PRE-FEASIBILTY REPORT OF KEDLA UGP (0.18 MTY...

Pre Feasibility Report of Kedla UG (0.18MTY), CCL

Job No: 311248 1 of 77 RI-III, CMPDI

PRE-FEASIBILTY REPORT OF KEDLA UGP (0.18 MTY)

CONTENTS

CHAPTER PARTICULARS PAGE NO.

List of Contents

Summarized Data 4 - 9

I Introduction 10 - 11

II Marketability & Justification 12 - 13

III Project Site Information 14

IV Geology & Deposit Appraisal 15 - 19

V Mine Boundary, Reserves & Mine Life 20 - 22

VI Mine Entries 23 - 24

VII Mining Strategy 25 - 28

VIII Method of Mining 29 - 36

IX Mining Schedule 37

X Horizontal and Vertical Transport 38 - 39

XI Mine Ventilation 40 - 41

XII Water Management, Pumping & Drainage 42 - 43

XIII Coal Handling Plant & Despatch 44 - 46

XIV Workshop Store & Magazine 47

XV Power Supply, Illumination & Communication 48 - 63

XVI Civil Construction 64 - 66

XVII Manpower, Productivity & Training 67 - 68

XVIII Safety & Conservation 69 - 71

XIX Environment Management 72

XX Mine Closure Planning 73

XXI Project Implementation Schedule 74 - 75

XXII Financial Evaluation 76 - 77

Appendices



PRE-FEASIBILTY REPORT OF KEDLA UGP (0.18MTY)

LIST OF APPENDICES

Appendix No.

Particulars Page No.

STATEMENT SHOWING THE

A HEAD-WISE TOTAL CAPITAL INVESTMENT FOR THE MINE AP-1

A.1 ESTIMATED CAPITAL INVESTMENT ON LAND AP-2

A.2 ESTIMATED TOTAL CAPITAL INVESTMENT ON CIVIL WORKS AP-3

A.2.1 ESTIMATED CAPITAL INVESTMENT ON SERVICE BUILDINGS AP-4

A.2.2 ESTIMATED CAPITAL INVESTMENT ON RESIDENTIAL BUILDINGS AP-5

A.2.3 ESTIMATED COST INDEX FOR CIVIL WORKS AP-6

A.2.4 UNIT COST OF RESIDENTIAL BUILDINGS AP-7

A.3 ESTIMATED TOTAL CAPITAL INVESTMENT ON PLANT & MACHINERY AP-8

A.3.1 ESTIMATED CAPITAL INVESTMENT ON ELECTRICAL P & M AP-9

A.3.2 ESTIMATED CAPITAL INVESTMENT ON WORKSHOP P & M AP-10

A.3.3 ESTIMATED CAPITAL REQUIREMENT FOR PUMPS, PIPES & FITTINGS AP-11

A.4 ESTIMATED CAPITAL INVESTMENT ON FURNITURE & FITTINGS AP-12

A.5 ESTIMATED CAPITAL INVESTMENT ON RAILWAY SIDING AP-13

A.6 ESTIMATED CAPITAL INVESTMENT ON VEHICLES AP-14

A.7 CAPITAL INVESTMENT ON PROSPECTING & BORING AP-15

A.8.1 ESTIMATED CAPITAL OUTLAY IN MINES AP-16

A.8.2 ESTIMATED CAPITAL INVESTMENT ON ROADS & CULVERTS AP-17

A.8.2.1 CAPITAL INVESTMENT ON APPROACH ROAD & CULVERTS AP-18

A.8.2.2 CAPITAL INVESTMENT ON COLONY ROAD & CULVERTS AP-19

A.8.2.3 CAPITAL INVESTMENT ON APPROACH ROAD TO MAGAZINE AP-20

A.8.3.1 CAPITAL INVESTMENT FOR COLONY WATER SUPPLY AP-21

A.8.3.2 CAPITAL INVESTMENT ON SEWERAGE EFFULENT TREATMENT AP-22

A.8.3.3 CAPITAL INVESTMENT FOR INDUSTRIAL WATER SUPPLY AP-23

A.8.3.4 CAPITAL INVESTMENT ON SEWERAGE EFFLUENT TREATMENT AP-24

A.8.4 ESTIMATED CAPITAL INVESTMENT ON EMP AP-25

A.8.4.A CAPITAL INVESTMENT ON ENVIRONMENTAL POLLUTION & CONTROL MEASURES

AP-26

A.8.5 ESTIMATED CAPITAL INVESTMENT ON RESEARCH & DEVELOPMENT AP-27

B ESTIMATED JOB-WISE/CATEGORY-WISE REQUIREMENT OF MANPOWER AP-28

C.1 ESTIMATED COST OF PRODUCTION PER TONNE OF COAL AT 100% AP-29

C.2 ESTIMATED COST OF PRODUCTION PER TONNE OF COAL AT 85% AP-30

D.1 ESTIMATED NET REVENUE CASH OUTFLOW AND IRR AT 100% CAPACITY AP-31

D.2 ESTIMATED NET REVENUE CASH OUTFLOW AND IRR AT 85% CAPACITY AP-32




LIST OF PLATES

Plate No. Particulars Scale

I Location Plan of Kedla UGP 1 : 5000

II Geological Plan of kedla UGP 1 : 5000

III Layout Plan of Seam-VIII 1 : 5000

IV Layout Plan of Seam-VI 1 : 5000

V Layout Plan of Seam-VA 1 : 5000

VI Land Use Plan of Kedla UGP 1 : 5000

VII Surface Plan of Kedla UGP 1 : 5000

VIII Topographical Plan of Kedla UGP 1 : 5000


LIST OF ANNEXURES

S. No. Particulars

1 Table of Extractable reserve for seam-VIII, VI, VA

2 Schematic Diagram of Power Distribution of Kedla UGP at surface &

Underground

3 G.A of truck loading system at kedla UG



PRE-FEASIBILTY REPORT OF KEDLA UGP(0.18 MTY)

SUMMARISED DATA

S.N. Particulars Unit Title / Value

A. GENERAL

1. Name of Project Kedla UGP

2. Name of CCL Command Area in which project lies.

Hazaribag Area , CCL

3. Nearest Railway Station from project Name Km

Danea Railway Station 9.0 Km (approx.)

4. Nearest National / State Highway/ Approach Road

Name Km

NH-33

B. GEOLOGICAL

1. Name of geological blocks considered Name Part of Kedla Block

2. Area of the geological blocks Considered for UG mine

Sq.Km. 3.335

3. Borehole within the considered Geological Blocks

BHs/sq.km. 26 (overall)

4 Actual Mining Area Sq.km 3.335

5. Description of all coal seams within block

Seam Thickness Range (m) Borehole

intersections Geological Reserve

1 2 3 4

Surface Cover

XIA 0.52 1

Parting 1.01

XI 5.45-7.52 3

Parting 7.71-8.48

XA 0.25-1.95 5

Parting 13.14-21.07

X 4.00 -7.70 5

Parting 23.63-34.85

IXA 0.24-1.00 8

Parting 8.82-15.28

IX 0.50-2.10 16 0.806

Parting 10.97-35.77

VIII C 0.20-1.55 26

Parting 4.14-24.49

VIII B 0.10-1.94 37 3.021

Parting 0.70-18.39

VIIIA 0.26-1.85 39

Parting 1.70-18.80

VIII 1.30-4.50 49 8.075

Parting 1.81-17.74

VIIC 0.09-1.46 40

Parting 0.41-10.83

VIIB 0.07-2.44 49

Parting 1.15-31.84

VIIA 0.07-1.90 43



S.N. Particulars Unit Title / Value

Parting 5.48-37.21

VII TOP 0.16-3.85 60 3.860

Parting 0.26-2.80

VII BOTTOM 0.46-4.97 61 3.959

VII COMB 3.80-4.90 2

Parting 0.06-4.10

VI 0.21-3.93 60 6.983

VII/VI 3.54-6.30 8

Parting 0.25-3.94

VA 3.00-7.80 73 21.242

VII/VI/VA 8.10-12.65 4

Parting 6.70-47.25

V 4.40-11.60 94 54.281

Parting 3.17-21.29

IV 1.27-7.70 122 38.962

Parting 0.90-17.29

III A 0.10-1.90 76

Parting 1.30-19.30

III Top 1.80-7.00 90 42.135

Parting 0.30-8.81

III Bottom 0.16-3.71 91 5.147

III Comb. 4.35-5.09 3

Parting 1.18-21.60

II B 0.20-2.28 83 10.445

Parting 1.06-14.25

II A 0.06-3.90 73 10.937

Parting 3.05-21.50

II Top 0.55-3.00 77 16.177

Parting 1.10-10.51

II Bottom 0.52-6.00 82 24.664

II Comb 3.65-6.50 14 14.140

Parting 12.20-41.40

I 0.61-10.50 83 48.434

Parting 77.13-112.62

0 0.35-5.35 57 15.936

C. TECHNICAL

1. Area of the proposed mine

Sq.km. 3.335 sq.km

2. Borehole intersection up to Target Seam( I,e Seam-VA ) within the considered geological Blocks

73

3. Mine parameters Max Extent along strike Max Extent along dip

Km Km

Mine No-1 Along strike : 1.5 km(max) Along Dip : 1.00 km( max) Mine No-3 Along strike : 1.8 km( max) Along Dip : 1.0 km( max)

4. Coal seams proposed to be worked Development of Seam-VIII , VI & VA

5. Mine Entries



Entries Name/ No. Size (X-section / length) (mxm/m)

Gradient (1 in …../vertical)

Approach (from / to)

(surface/seam to seam)

Purpose

Mine No-1

Incline No.1A 4.2 x 2.8 1 in 10 Surface to Seam-VIII

Intake(Haulage)

Incline No.1B 4.2 x 2.8 1 in 10 Surface to Seam-VIII

Intake (Traveling)

Airshaft Dia -4.2m 10m Surface to Seam-VIII

Return

Mine No-3

Incline No.3A 4.2 x 2.8 1 in 8 Quarry Edge to Seam-VA

Intake(Haulage)

Incline No.3B 4.2 x 2.8 1 in 8 Quarry Edge to Seam-VA

Intake (Traveling)

Airshaft Dia -4.2m 20m Quarry Edge to Seam-VA

Return

SN

Particulars Unit Value

6. Method of Mining B&P (SDL)

7. Panel Parameters No. of headings in each panel

Size of galleries / roadways Pillar sizes

Nos.

m m x m

5 to 7

4.2 m x 3.0 m or seam thickness

28m x 28 m

8. Production Parameters No. of panels to be worked

Production from 2 panels

Nos.

TPD

2.0

600

9. Target Output Nominal production capacity (at 100%) Peak production capacity (at 120%) Production capacity (at 85%)

Mt Mt

Mt

0.18 0.22

0.15

10. Year of achieving target production (from zero date)

4 th Year

11. Production phasing (from zero date upto target year)

Year / Project

Year 1 Year 2 Year 3 Year 4 Year 5 to 18

Kedla UGP 0.09 0.09 0.14 0.18 0.18

12 Total mine life (at Nominal production

Years

18 years



capacity)

Construction period

Production build-up period

Targeted Production

Tapering / mine closure period

Years

Years

Years

Years

2 years

1 years

4 th years

1 year

13. Degree of gassiness (I/ II/ III) Degree- I (assumed)

14. Major equipment deployed in panels

Nos. SDL : 2 Set ( 6 nos) UDM : 2 set(4nos)

15. Average specific energy consumption

kWh/t

16. Total net manpower(proposed) Existing

Additional

Nos. Nos. Nos.

502 Nil Nil

17. Overall output per manshift (OMS)

Existing Incremental

Tonnes Tonnes Tonnes

1.36 (w.r.t net manpower) 0.44

SN


18. Grade of coal W-III to W-IV

19. Presence of Major Surface constraints (forest, nallas, road, power line, etc.)

(type) Forest Land within the mining area

20. Coal Transport i. Incline ii. Main trunk

roadway iii. Panel

i. By belt conveyor ii. -do- iii. –do-

21. Men Transport Man-riding system

22. Surface coal transport (from Pithead to washery)

Point of sale is washery

23. Name of any specific customer / industry

As decided by the Company

D. ENVIRONMENTAL & OTHERS

1. Civil Construction Residential houses

Housing satisfaction

Nos.

%

Nil 55

2. Potable Water Demand Industrial Water Demand

238 KLPD 0.024MLPD



3. Total land in Possession Non Forest Land

Forest land

Ha Ha.

274.72 58.78

4. Land to be acquired Non Forest Land

Forest land

Ha. Ha. Ha.

333.50 274.72 58.78

5. N.P.V for Non-Forest land N.P.V for Forest Land

Total Area Total Value

Rs. Lakhs / ha.

Rs Lakh/Ha Ha.

Rs.Lakhs

25.00

9.0 58.78

349.94

6. Cost of land & Rehabilitation Total Cost of Land

R&R Cost

Rs.Crores

3.94 Nil

7. Total EMP capital Environmental Protection Cost

Rs.Lakhs Rs / Te

60.00 6.00

8. Average annual rainfall mm 1200-1400

9. Make of Water Lit / sec 208

SN


11 Total installed pumping capacity (through borehole or through incline/ shaft)

LPS 240

12 Drainage of the Area (Name of river / nallah)

Chutua Nala

13 Any proposed diversion of nala or power line

Nil

E. FINANCIAL

1. Total Capital Investment Upto Target

Existing Additional

Beyond Target

Rs. Crores

53.91 14.67 39.24 5.13

2. Specific Investment upto Target

Rs./tonne 2994.76

3. Total Capital Investment on P&M

Upto Target Beyond Target

Rs.Crores

35.46 2.45

4. Specific Investment on P&M upto Target

Rs./tonne 1969.98

5. Additional Capital requirement Rs.Crores 39.24



upto Target year

6. Year of opening of Revenue Account (from zero date)

No REC

7. Earnings per manshift (EMS) Rs. 2576.44

8. Estimated cost of production At 100% production level At 85% production level

Rs./tonne 2829.92 3296.22

9. Estimated average selling price (at 98.5% sales realization)

Rs./tonne 1562.07

10. Estimated profit At 100% production level At 85% production level

Rs./tonne -1267.85 -1734.15

11 Financial Internate rate of return (FIRR)

At 100% production level At 85% production level

% -Ve -Ve

14. Break-even point Production

Production level

Mty %

0.35

192.24%

SN


15 Mine Closure Cost (for corpus fund)

Rs /Te 23.64

16 Expected Completion Capital Rs. Crores 56.76

17 Financial IRR for completion cost

% -Ve



CHAPTER-I

INTRODUCTION

1.0 BACKGROUND OF THE REPORT

As per the Project Monitoring Report of CCL & letter of CGM(P&P) vide letter no

CGM(P&P)/2012/2759-60 dated 24.8.2012 , Kedla UG is an existing mine. Presently, the property

under Kedla UG is being worked through three set of separate inclines / mines. Seam VIII has

been approached from Mine Nos. 1 & 2 while seam V-A has been approached from Mine No. 3

and reverse drift from seam-VIII.

As per the CCL authority, it was communicated vide note sheet no CCL (H) / P&P / (2/8) /622

dated 27.9.2012 that, the said mine is running under violation and it requires fresh EMP. For the

said purposes, a pre feasibility report for kedla UGP is required.

1.1 SCOPE OF WORK

The scope of this pre feasibility report is limited to

a) Development & Depillaring of Seam-VIII. This seam is the top seam in the mining area of

Kedla UG and around 90% of the area is developed and depillared. Only 10% area is left,

which is partly developed & standing on pillar and partly virgin.

b) Development of underlying Seam-VA with the existing mine entries.

c) Development of underlying seam-VI which is around 3.0m above seam-VA.

1.2 REASONS FOR THIS LIMITED SCOPE

This report is only for EMP approval of kedla underground for a limited period to avoid

violation (up to the period of proposed kedla opencast (6.0Mty) comes in operation).

The mining area of existing Kedla underground has already been considered in the proposed

Kedla opencast project (6.0 MTY) up to seam-I and shelved due overburden dump problem.

Kedla opencast may be started only after exhaustion of Gose opencast. It is being proposed

that after liquidation of Gose Opencast in its adjoining area, the overburden of Kedla OCP will

be dumped into the de-coaled area of Gose opencast.

Seam-VIII, VI & V’A’ has already considered in the proposed project report of Kedla opencast.

This feasibility report also proposes the working in same seam.



The extraction of developed seam-VI, V’A’ by opencast will give higher percentage of recovery

in comparison to depillaring by underground mining methods.

Seam-VIII is mostly developed & depillared up to its full seam thickness except a small patch.

Hence this report envisages only development of seam-V’A’ and seam- VI & development

&depillaring of left out patch of seam-VIII.



CHAPTER-II

MARKETABILITY & JUSTIFICATION

2.1 DEMAND AND SUPPLY SCENARIO

The demand and supply scenario for CCL is given below:

S.N Particulars 2012-13 2013-14 2014-15 2015-16 2016-17

A PSA/LOA Commitment at 100% level without any regulation

1 For Power Sector 59.75 61.00 70.39 73.73 73.73

2 Other than Power Sector 16.35 16.35 16.35 16.35 16.35

3 E-auction @ 10% of total

production

5.50 6.20 7.00 7.60 8.30

4 Total Demand 81.60 83.55 93.75 97.68 98.38

5 Total Production 55.00 62.00 70.00 76.00 83.00

Gap -26.60 -21.55 -23.75 -21.68 -15.38

2.2 UTILITY OR MARKET FOR THE COAL FROM PROJECT

The coal produced from the proposed kedla Underground project will be of medium coking coal. Its

grade will vary from W-III to W-IV. Our country has huge requirement of coking coal for steel

industry. Presently our countries coking coal requirement is filled with indigenous coking coal

production of my country. Hence it is partly met by the import of coking coal from abroad. The coal

produced from this project will get good market potentiality and it will help in reducing the import of

coking coal from abroad.

2.3 AVAILABLE LINKAGE

The coal from the proposed Underground project is proposed for basket linkage from the mine pit

top to kedla washery. The point of sell of the coal produced from the proposed kedla underground

will be kedla washery.

2.4 JUSTIFICATION OF OPENING THE PROJECT BASED ON MARKETABILITY

Coal produced from Kedla underground is of medium grade coking coal ( grade varies from W-

III to W-IV )



The demand of superior grade coal is very high in the country; hence, it can be easily marketed.

The company is facing a negative gap between demand and availability of coal as shown in the

table above.



CHAPTER-III

PROJECT SITE INFORMATION

3.0 LOCATION & ACCESSABILITY

The integrated Kedla Block, lies in the West Bokaro Coalfields of CCL & is covered by survey of

India Topo Sheet No E 73/ 9 on RF 1 : 50,000. The area is also covered by the aerial photographs

on RF 1 : 10,000.

The NH-33, connecting Ranchi & Hazaribagh town passess along the western fringe of the

coalfields. The block is approachable from Naya more Kuju along the coal trunk route. The

nearest railway station is Danea railway station at an about 9.0km from the eastern fringe of the

block. The nearest airport is located at ranchi at a distance about 100km.

3.1 PHYSIOGRAPHY AND DRAINAGE

The general elevation varies from 326m to 388m.The natural topography of the area has been

obliterated to a certain extent by a network of opencast mine. However, in general, the topography

is undulating and at places is seen to be broken by hillocks. The topography is rugged in the NW

part also. It is rugged & hilly.

The drainage of the block is controlled by the Eastern flowing Chutua Nala in the north along the

northern boundary, the easterly flowing Bokaro River in the south beyond the block boundary.

3.2 CLIMATE

The climate is extreme during summer and temperature reaches up to 46 degree and during winter

comes down up to 5 degree Celsius.



CHAPTER-IV

GEOLOGY & DEPOSIT APPRAISAL

4.1 GEOLOGY OF THE BLOCK

The integrated Kedla block covers a large area and comprises the kedla UG and kedla opencast

projects. This block shows the existence of Barakar & Karharbari formation.Barakar formation

shows the existence of seams from seam-I to XI where as karharbari formation shows the

existence of ‘0’ seam.

An igneous intrusion of about 0.6m thickness with a vertical disposition (Dyke) was encountered in

the underground workings of seam-VIII. The strike of dyke is almost East-West . A dyke has also

been encountered in borehole CMK135.Another dyke (East-West) alignment , is exposed on

surface in the sothern part of the kedla integrated block near BH nos NCWBK26 and CMK159..

Alluvium , having a thickness of about 10m or so is observed on the banks of the Chutua Nala. In

fact the flood plain of this nala is the repository of alluvial soil in the area. Its thickness is seen to

decrease towards south.

4.2 EXPLORATION STATUS

The block is geologically explored. The overall borehole density in the block is 26 boreholes /

sqkm. The borehole density for seam-I & II is around 11 boreholes / sqkm. Where as the borehole

density for 0 seam comes around 7boreholes / sqkm.

4.3 GEOLOGICAL STRUCTURE OF THE BLOCK

The block is structurally a north dipping Homocline that forms the southern limit of the northern

synform of this coalfield. The general strike of the strata is East-West with northerly dips of 5o to

10o on an average. Local variations are noticed mainly near faults in different sectors of the block.

The present structural interpretation of the block has revealed the presence of 13 no of faults

having throw of 2m to 200m or more. The faults in the block in general are dip & oblique faults.

Fault F14 in the north and roughly following the trend of the Chutua Nala is the only strike faults in

the block.Fault F1 & F14 have the throw of 200m or more. Other faults have throw ranging from 2m

to 50m.



4.3 DESCRIPTION OF COAL SEAMS

There are 25 regionally correlatable coal seams from Seam-XIA , which is is the youngest to seam

‘0’ the oldest. Splitting & merger characteristics have been observed in seam-VII, III & II. The

sequence of coal seams within the Kedla Integrated geological block is as under:

Seams Thickness Range(m) Parting(m) with overlying seam

BH intersection

XIA 0.52 1

XI 5.45 - 7.50 1.01 3

XA 0.25 – 1.95 7.71 – 8.48 5

X 4.00 – 7.70 13.14 – 21.07 5

IXA 0.24 – 1.00 23.63 – 34.85 8

IX 0.50 – 2.10 8.82 – 15.28 16

VIII’C’ 0.20 – 1.55 10.97 – 35.77 26

VIII’B’ 0.10 – 1.94 4.14 – 24.49 37

VIII’A’ 0.26 – 1.85 0.70 – 18.39 39

VIII 1.30 – 4.50 1.70 – 18.80 49

VII’C’ 0.09 – 1.46 1.81 – 17.74 40

VII’B’ 0.07 – 2.44 0.41 – 10.83 49

VII’A’ 0.07 – 1.90 1.15 – 31.84 43

VII(TOP) 0.16 – 3.85 5.48 – 37.23 60

VII(BOT) 0.46 – 4.97 0.26 – 2.80 61

VII(COMB) 3.80 – 4.90 0.26-2.80 2

VI 0.21 – 3.93 0.06 – 4.10 60

VII / VI 3.54 – 6.30

VA 3.00 – 7.80 (VII/VI/VA-8.10 – 12.65)

0.25-3.94 73

IV 1.27 – 7.70 3.17 – 21.29 122

III’A’ 0.10 – 1.90 0.90 – 17.29 76

III(TOP) 1.80 – 7.00 1.30 – 19.30 90

III(BOT) 0.30 – 3.71 0.30 – 8.81 91

III(COMB) 4.35 – 5.09 3

IIB 0.20 – 2.28 1.18 – 21.60 83

IIA 0.06 – 3.90 1.06 – 14.25 73

II(TOP) 0.55 – 3.00 3.05 – 21.50 77

II(BOT) 0.52 – 6.00 1.10 – 10.51 82

II(COMB) 3.65 – 6.50 14

I 0.61 – 10.50 12.20 – 41.40 83

0 0.35 – 5.35 77.13 – 112.62 57

Out of the above mentioned coal seams, Barakar formation contains seams up to seam-I where as

karharbari formation contains only o seam. The proposed scheme proposes workings of seam-VIII,

VI & VA only.



Seam V A

Seam VA occurs below Seam VI with a parting ranging from 0.25 m to 3.94 m. Average parting is

around 2.5m.The seam overlies Seam V with a parting ranging 6.70m to 47.25m. The thickness of

seam VA varies from 3.00m to 7.80m.

Depth of Intersection of Seam VA from surface:

Shallowest : 21.86m (old data)

Deepest : 159.65 m (old data)

Stratigraphic Position of Seam VA

Seam VA lies between Seam V and Seam VI.

Parting : The parting of Seam VA with underlying Seam V is 6.70 to 47.25m and with overlying

seam VI is 0.25 to 3.94m.

Splitting : No splitting reported.

Roof & Floor: Roof of the seam VA is carbonaceous shale excepting 1 borehole where it is shale

and sandy shale. The Floor of the seam is mostly carb. Shale sometimes grey shale or alternating

bands of shale and sandstone.

Incrop/ Outcrops : The Seam VA does not outcrop in the area.

Seam VI

Seam VI occurs below Seam VII Bottom with a parting ranging from 0.06 m to 4.10 m. The seam

overlies Seam VA with a parting ranging 0.25m to 3.94m. The thickness of seam VI varies from

0.21m to 3.93m.

Depth of Intersection of Seam VI:



Stratigraphic Position of Seam VI: Seam VI lies between Seam VA and Seam VII Bottom.

Parting: The parting of Seam VI with underlying Seam VA is 0.25 to 3.94m and with overlying

seam VII Bottom is 0.06 to 4.10m.

Splitting: No splitting reported.



Roof & Floor: Roof of the seam VI is generally carbonaceous shale followed by grey shale,

alternating bands of sandstone and shale. The Floor of the seam is mosly carb. Shale sometimes

grey shale or alternating bands of shale and sandstone.

Seam VIII

Seam VIII is the youngest workable seam in the Kedla UGP and also is the only workable seam

whose in crop exists within the project. The seam is being mostly developed & depillared through

Mines No. 1&2. The thickness of seam VIII varies from 1.30m to 4.50m.

Status of mining : Worked seam

Depth of Intersection of Seam VIII.



Stratigraphic Position of Seam VIII : Seam VIII lies between Seam VIITop and Seam VIIIA.

Parting : The parting of Seam VIII with underlying Seam VII Top is 8.85 to 97.62m and with

overlying seam VIIIA is 1.70 to 18.80m.

Splitting : No splitting reported.

Roof & Floor: Roof of the seam VIII is mostly carbonaceous shale, & sandstone. The Floor of the

seam is mostly carb. shale, grey shale and alternating sandstone and shale and sandy shale.

Incrop/ Outcrops: The Seam VIII incrops in all the sectors in the area.

4.5 QUALITY OF COAL SEAMS CONSIDERED FOR THIS SCHEME

The seam considered in this scheme is seam-VIII, VI & VA. Seam-VA is comparatively thick and

better in quality. Seam-VI is moderately thin with low ash content.



Coal Seams Sample Type Ash % GCV (kcal/kg) range (as per GR)

VIII Ex –Band

21.8 – 30.7 5846 – 6273 (8440 – 8655)

In-Band 25.6 – 45.6 5846 - 6025

VI Ex -Band 14.9 – 28.6 6230 – 7066 (8479 – 8675)

In-Band 19.0 – 30.9 5614 - 6724

V’A’ Ex -Band 21.3 – 30.8 5305 – 6482 (8543 – 8666)

In-Band 24.3 – 31.1 5734 - 6264

Note: Figures in the bracket indicates the GCV of the coal where as other figures shows the UHV of the

coal.

4.6 GEOLOGICAL RESERVE OF SEAMS CONSIDERED

The geological reserve considered for this scheme is as under:

Seam Grade Geological Reserve(M.Te)

VIII W-III to W-IV 8.075

VI W-IV 6.983

VA W-III to W-IV 21.24

Total 36.298



CHAPTER-V

MINE BOUNDARIES, RESERVE & MINE LIFE

5.0 ESTIMATION OF EXTRACTABLE RESERVE

The following considerations have been adopted for estimation of extractable reserve:

a) The reserve has been estimated for the workable mining area only. No area having hard cover less

than 15m have been considered for the purpose of estimation of extractable reserve.

b) The height of extraction for the proposed mining area have been considered as full seam thickness

maximum up to 4.5m after leaving 0.6m coal in roof. Since, the immediate roof of seam-VIII, VI & VA is

of carbonaceous shale. Therefore, it is proposed to leave 0.6m coal against shale roof. The panel wise

thickness has been considered on the basis of boreholes falling within the panel or its adjoining panels

and isocore of the seams.

c) The seam wise development height and width of the gallery considered for estimation of

extractable reserve are as under :

Seam

Status of seam

Pillar Size (Existing / Proposed)

Workable seam thickness in the mining area

Existing Development Height

Proposed Dev Height (m)

Proposed Depillaring Height

Width of Gallery (Existing / Proposed)

VIII Mostly Develo

ped

28m x 28m 2.20-3.25 3.00 3.00 Full seam thickness

4.2m

VI Virgin 28m x 28m 2.0 – 3.93 Virgin 3.00 or seam

thickness

Full seam thickness

4.2m

V’A’ Partly Develo

ped

28m x 28m (Existing)

2.89 - 4.25 (Mine No-3)

3.00 3.00 Full seam Section

4.2m

28m x 28m (Existing)

3.03 – 5.39 (Mine No-1)

3.00 (partly virgin)

3.00 or seam

thickness

Full seam Thickness or max. up

to 4.5m

4.2m

Note : Proposed development height is after leaving 0.6m coal against shale roof.

Part of the property (in the west of fault F5) is mostly developed through mine no-3 of seam VA. The

Pillar size in this area is 28m x 28m with gallery width 4.20m. Seam-VI is workable over this area (in

the west of fault F5) with a parting less than 3.0m. Hence, seam VA and seam VI in this section (I,e in

the west of fault F5) are contiguous to each other. Hence the pillar in both the seams should be

vertically coincident with each other. Hence the pillar size & gallery width for development of seam VA

have been considered as that of seam VA.



The part of the property of seam VA(I,e in the east of fault F5), is also developed through reverse drift

from seam-VIII having pillar size 28m x 28m with gallery width 4.2m. Hence, the pillar size & gallery

width for the remaining area where development is proposed have been considered as that of the

existing pillar size & gallery width of 28m and 4.2 respectively. The said data regarding pillar & gallery

size have been provided by the colliery during field visit.

d) The percentage of extraction for the in-situ developed pillar has been taken as 65%.of the total

in-situ pillar reserve.

e) The specific gravity of the coal has been considered as per the average grade of the coal within

the panel. The average grade has been considered based on the analyzed borehole falling within the

panel or as per isograde of the coal falling within the panel or its adjoining panels. The formula used

for determination of specific gravity is as under

Sp Gravity = 1.28 + 0.01 x Ash%

f) Reserve lost in panel barriers, due to % of extraction, barrier against fault, river, nala, and panel

barriers etc have been considered as the mining losses for the project.

g) Extractable reserves of the individual panels have been determined by multiplying the area of

the panel, average workable seam thickness( after leaving 0.6m coal against shale roof) in the panel

and specific gravity of coal of that panel , % of extraction in development for a particular pillar size

and seam thickness within the panel.

h) In mine no-3, generally roof coal more than 0.6m is left to maintain a minimum parting of 3.0m

between seam VA & VI.

i) Extractable reserves have been estimated after leaving barriers against river / nala as per

statute with due consideration of angle of draw as 30 degree.

The seam wise development and depillaring reserve for the proposed kedla underground is as

under:

Seam Extractable Reserve(M.Te)

Total Development Depillaring

VIII 0.12 0.44 0.57

VA(Mine-3) 0.43 3.20 3.63

VA(Mine-1) 0.96 2.74 3.70

VI 1.02 1.58 2.60

Total 2.58 7.96 10.54

Reserve for this Scheme

3.02 ( Development reserve of all three seams + Depillaring reserves of seam-

VIIII )



Mine wise, seam wise, grade wise extractable Reserve

Mine No Seam GCV Dev Dep Total Weighted Av GCV(Kcal / Kg)

Mine No -1 VA 5758.24 0.142 0.378 0.520 5988.46

6040.72 0.82 2.360 3.18

Total Mine No-1 0.96 2.74 3.70

Mine No-3 5755.52 0.335 2.135 2.47 5844.24

6037.87 0.095 1.067 1.162

Total Mine No-3 0.430 3.203 3.63

Mine no -3 Seam-VI 6137.10 0.406 0.576

0.980 6278.81

6372.30 0.615 1.005 1.620

Total Mine No-3(Seam-VI) 1.021 1.581 2.602

Mine No-1 Seam-VIII

6044.26 0.12 0.44 0.56 60444.26

Total Extractable Reserve 2.22 7.15 9.37

5.1 ESTIMATION OF MINE LIFE

The scope of this scheme is limited to only development of seam-VI, VA & partly seam-VIII and

development and depillaring of seam-VIII (remaining part of area). The development reserve for seam-

VIII, VI & VA comes around 2.58M.Te. In the remaining part of the area of seam-VIII, the depillaring

reserve comes around 0.44M.Te. The total extractable reserve considered for this scheme comes

around 3.02 M.Te. This 3.02 M.Te extractable reserve includes development reserve of seam VIII, VA

& VI and depillaring reserve of seam-VIII.

It is proposed to work two SDL district at a time. In one SDL district there will be three SDL with two

UDM. The productivity of one SDL(as per CIL norms) has been taken as 100TPD.

Production from one SDL District : 3 x 100 = 300TP

No of districts in operation : 2

Total Production in a day : 2 x 300=600 TPD

Nominal Production in a year : 0.18 MTY

Peak Production in a year : 0.22 MTY

Estimated Production Period : 16 Year

Construction Period : 2 Year

Life of the mine including construction period: 18 Year

(Note: The existing production of Kedla UG is around 300 TPD which will continue during

construction period.)



CHAPTER-VI

MINE ENTRIES

6.0 EXISTING MINE ENTRIES

Presently, the property under Kedla UG is being worked through three set of separate inclines / mines.

Seam VIII has been approached from Mine Nos. 1 & 2 while seam V-A has been approached from Mine

No. 3 and reverse drift from seam-VIII to seam VA (in the area east of fault F5 I,e in the area of mine no-

1).

In Mine No.1, seam VIII has been mostly developed & depillared except area lying below HFL of Chutua

nala. In Mine No. 1, seam V-A has also been approached from seam VIII in underground by a pair of

reverse drifts. Only part of development has been made in seam V-A.

In Mine No. 2, only seam VIII has been approached by a pair of inclines. The area in the west of fault F5

has already been developed and depillared.

In Mine No. 3, seam VA has been approached from the high wall of old quarry of Kedla OCP. The seam

is under development by B&P method.

Mine / Incline Incline Specification Existing Uses

Mine No-1

Incline no-1A Length-60m, Gradient ,1 in 8.0 Haulage

Incline no-1B Traveling

Air Shaft Dia -4.2m, Depth -10m Return

Mine No-2

Incline no-2A Length-60m, Gradient ,1 in 8.0 Haulage

Incline no-2B Travelling

Incline no-2C Return

Mine No-3

Incline no-3A Approached from Quarry Edge Haulage

Incline no-3B Travelling

Incline no-3C Return

6.2 PROPOSED MINE ENTRIES

The area of mine no-3 & mine no-1 is separated by a fault F5 having westward throw of 20m .It is

proposed to approach the area of mine no-1 from mine no-3 in seam VA with a set of three drifts

from panel III5A-18 to I5A-11.The proposed two drift will serve the purpose coal evacuation &

material supply and act as intake airway and one will act as return of mine no-1 .



Seam-VI is lying around 2.5m above seam VA. In the east of fault F5, the seam-VI is not workable

due to low seam thickness. In the west of fault F5, seam-VI is workable (I,e in the mining area of

mine-3). The seam-VI in this area is contiguous with of seam-VA. Hence it is proposed to extract the

coal in both the seams simultaneously. Seam VA is mostly developed in this area and standing on

pillars. The panels of seam-VI have been proposed vertically superimposed with seam-VA with same

pillar size & gallery width. It is proposed to approach the seam-VI through set of three drifts from

trunk headings of seam-VA of mine no-3 near panel III5A-17.

The details of the various drifts & their uses are as under:

Drift from to Specification Purposes

D1 Mine-3

Seam-VA

Mine-1

Seam VA

Length-90m

Gradient-1 in4.5

Coal Evacuation / Intake

D2 Mine-3

Seam-VA

Mine-1

Seam VA

Length-90m

Gradient-1 in4. 5

Material Transport / Intake

D3 Mine-3

Seam-VA

Mine-1

Seam VA

Length-90m

Gradient-1 in4. 5

Return of the mine

D4 Mine-3

Seam-VA

Mine-1

Seam VA

Length-90m

Gradient-1 in4. 5

For Pumping from mine-1

to mine-3

D5 Mine-3,

Seam VA

Mine-3 Seam-VI Length-14m

Gradient – 1 in 4.5

Coal Evacuation from

seam-VI

D6 Mine-3,

Seam VA


Gradient – 1 in4.5

Material Transport for

seam-VI

D7 Mine-3,

Seam VA


Gradient – 1 in 4.5

Return airway for seam-VI

In addition to above drifting lump sum provision has been made for sump arrangement & other

drivages in this report.

Note : The existing mine entries is proposed to be utilized for the proposed kedla underground.



CHAPTER-VII

MINING STRATEGY

7.0 MINING STRATEGY

The mining area of kedla underground has following constraints.

7.1 SURFACE CONSTRAINTS

These are the following surface constraints for the existing Kedla underground.

The Chutua nala makes the northern boundary of the mine.

Houses & Hutments of CCL are falling over the mining area of Kedla underground.

Villages & other surface infrastructures

Incrop of seam-VI& VA are extracted by opencast. In mine no-3, seam-VA has been approached

from the quarry batter.

7.2 UNDERGROUND CONSTRAINTS

Seam-VIII is mostly developed & depillared. Seam-VI & VA is lying within 60m from the floor of

seam-VIII.

Seam-VI & VA is contiguous with each other parting ranges from 2 to 3 m within the proposed

mining area.

The proposed underground mining area is traversed by three faults F5, F6 & F16.

Seam VA is manually developed along the floor of the seam and the seam has swinging floor

contour.

The immediate roof of seam VA, VI & VIII is of carbonaceous shale.

7.3 STRATEGY TO WORK IN KEDLA UNDERGROUND

a) STRATEGY TO WORK: It is proposed to utilize the existing mine infrastructure like mine entries,

surface bunker, manpower, residential & service buildings. It is proposed to introduce mechanization

with SDL for development & depillaring of seams. There will be three SDL and two UDM in a district.

There will be two districts in operation .Firstly, it is proposed to developed & depillared the remaining

few panels of seam-VIII. After completion of development & depillaring of seam-VIII, both the SDL

districts are proposed to be shifted in mine no-1 of seam-VA for its development in virgin patch. After



completion of development of seam-VA in mine no-1, both the SDL districts are proposed to be

shifted for development of seam-VI in mine no-3 of seam-VA. Seam-VA & VI are contiguous with

each other; hence it is proposed to depillar the seams simultaneously maintaining a parting between

the seams as 3.0m. However, no depillaring is proposed in seam-VA & VI in this report. The pillars

and galleries of seam-VA & VI are proposed vertically coincident with each other. The pillars and

gallery widths of seam-VI are proposed as that of seam-VA to make the pillars and galleries. It is

proposed to work one seam at a time with two SDL districts to improve the work concentration and

for higher production & productivity with due consideration of safety.

b) STRATEGY FOR COAL EVACUATION : It is proposed to rationalize the coal evacuation system.

In order to rationalize the coal evacuation system, it is proposed to connect the mine no-1 & mine no-

3 with set of three drifts. Seam-VA & VIII is already connected with reverse drifts in mine no-1.Initially

when development & depillaring will be in seam-VIII, the coal extracted from the faces will be brought

to seam-VA of mine no-1 through reverse drifts with series of gate & trunk belt conveyors. From mine

no-1, the coal is proposed to bring in seam-VA of mine no-3 through drift with belt conveyors. From

mine no-3, the coal will be transported up to surface with main trunk belt conveyor. The centralized

coal evacuation system have been proposed in this report from mine no-3.Coal extracted from

seam-VI is proposed to bring in seam-VA through staple pit or belt in drift and finally up to surface

with the main trunk belt in seam-VA.

c) STRATEGY FOR PUMPING : Since, the overlying seam-VIII, in majority of the area in mine no-1

is depillared with caving. The dip most point in the developed area is below HFL. Hence, borehole for

pumping can not be made in the HFL area. Outside the HFL of seam VIII, borehole for pumping may

be done. The main sump for seam-VIII in mine no-1 area will be in the trunk roadway of that seam.

There fore it is initially proposed that while development and depillaring of the remaining part of seam

–VIII, water will be collected at the main sump in trunk heading of seam-VIII and accumulated water

will be pumped out in to chutua nala through settling tank(after proper treatment) through borehole

pumping . The existing pumps of seam-VIII are proposed to be utilized for the purpose. After

depillaring of seam-VIII in mine no-1, borehole pumping will not be practically possible through

goaved out area, hence, incline pumping have been proposed for the remaining life of the mine.

While development of seam-VA, the pumping of seam-VA in mine up to the trunk heading & panel-

I5A-7, the pumping will continue with existing pumping system. After development of panel I5A-7,

one drift has been proposed from mine no-1 to mine no-3 in seam-VA. Through this drift, it is



proposed that the water collected at the main sump of seam-VA in mine no-1 area will be pumped

into mine no-3 in seam-VA main sump, from where the accumulated water will be pumped out up to

surface through inclines. Accordingly provisions have been made in this report.

While working in seam-VI in mine no-3 area, the water collected in the seam is proposed to bring to

main sump of seam-VA of mine no-3 through staple pit, from where water will be pumped out to

surface through inclines.

The pumping in seam-VA for both mine no-1 & mine no-3 will continue to prevent from water logging.

Accordingly provisions have been made in this report.

c) STRATEGY FOR MAN & MATERIAL SUPPLY : In case of seam-VIII, existing

haulage of mine no-1 is proposed to be utilized for material supply from surface to underground trunk

roadway. From trunk roadway various endless haulages have been proposed for material supply up

to working districts.

In case of seam-VA & VI, existing haulage of mine no-3 is proposed to be utilized for material supply

from surface to underground trunk roadway. From trunk roadway various endless haulages have

been proposed for material supply up to working districts.

Man riding system is proposed for man transport from surface to underground for seam VA, VI & VIII.

The shifting of man riding system may be required .

d) STRATEGY FOR VENTILATION: Existing air shaft in mine no-1 is proposed to be utilized for

return airways for seam-VIII, mine no-1 area. In case of seam-VA & VI development, existing fan

installation of mine no-3 is proposed to be utilized for return airway to rationalize the manpower

deployment. However, it is proposed to conduct ventilation study with the revised layout of the mine

and the recommendations of the ventilation study should be complied effectively for proper

ventilation of the mine.

e) STRATEGY FOR WORKING WITH SURFACE CONSTRAINTS: In case of chutua nala, a barrier

against HFL of Chutua nala is left as per statute along with considering angle of draw of 30 degree.

No working is proposed below HFL except prior permission of DGMS. In case of Seam-VIII, pillars

are already developed below HFL. Beyond HFL, a small patch of seam-VIII may be workable after

leaving the barrier against HFL, which can be approached only through developed workings below

HFL. Hence, prior to work this small patch, DGMS permission is proposed to be obtained. In case of

other seams like seam-VA & VI , no working is proposed below HFL and within the barrier left

against HFL.



A barrier against the boundary of house & hutments considering angle of draw of 30 degree have

been left. No depillaring is proposed below houses & hutments and villages in the mining area of

kedla underground. However this report envisages only development of seam-VA & VI. But while

depillaring of seam-VIII , the said precautions is to be taken.

f) STRATEGY TO WORK WITH UNDERGROUND CONSTRAINTS :

Mine No-1: The parting between seam-VA & VIII is generally less than 60m except borehole no

CMK-120 & NCVBK-04) in mining area of mine no-1. These two boreholes show parting between

seam-VIII & VA 67m and 62m respectively. The depillaring of seam-VIII in the mining area of mine

no-1 is extracted using wide & stall method to protect the surface features. Hence, it is almost sure

that the area where wide & stall method have been used will be completely filled with water. This

attracts Reg 127 of CMR 1957. Therefore, it is proposed that while depillaring of the panels in

underlying seam-VA & VI, dewatering of overlying panels in seam-VIII should be ensured by putting

long boreholes in roof through burn side boring machine. However, no depillaring is proposed in

these underlying seams in this report. If any abnormal seepage is observed while development in

underlying seams, the thickness of parting & reasons for abnormal seepage should be checked by

putting lone hole with burn side boring equipment .Accordingly, provision of burn side boring machine

and additional pumping provisions has been made in this report for safe and secure mining.

Mine no-3: The parting between seam-VA & VIII is generally less than 60m in mining area of mine

no-3. Parting between seam-VIII & VA and between seam-VIII & VI varies from 58.77m to 48.35m

and 54.85m to 42.05m respectively. This attracts Reg 127 of CMR 1957. Therefore, it is proposed

that while depillaring of the panels in underlying seams, dewatering of overlying panels in seam-VIII

should be ensured by putting long boreholes in roof through burn side boring machine. However, no

depillaring of underlying seams in this mine area have been proposed in this report.

The proposed mining area is traversed by three faults. A barrier of 20m has been proposed to be left

on either side of the fault for safety reasons.



CHAPTER-VIII

METHOD OF MINING

8.0 METHOD OF MINING

8.1 APPROACH TO SEAMS: The existing inclines of mine no-1 & 3 are proposed to be

utilized as mine entries for the seams.

8.2 TRUNK ROAD DEVELOPMENT IN SEAMS : The existing trunk road developed in seam-VIII

& VA is proposed to be utilized for the seams. The parting between seam-VI & VA in the mining area

of mine no-3, varies from 1.08m to 2.75m (based on randomly selected boreholes within the mining

area). Hence, it is proposed that pillars & galleries of the trunk heading of seam-VI will be vertically

superimposed to the gallery and pillar sizes of seam VA.

8.3 PANEL DEVELOPMENT IN SEAMS : In case of already developed seams paneling

have been proposed considering its natural panel barrier left while development of seams. In case of

virgin seams five heading self draining panels have been proposed in accordance with existing pillar

sizes from centre to centre and gallery width of the seams. Since, seam-VI & VA are contiguous, the

superimposed panels of seam-VI & VA have been proposed in this report.

8.4 METHOD OF MINING : Bord & Pillar with SDL

8.5 MINING PARAMETERS : The seam wise mining parameters within the considered

mining area of the proposed Kedla underground are as under:

Seam-VIII

i) Depth of the panels from Surface : 6m-100m( Mine No-1) & 9.36m – 77.08m( Mine no-3)

ii) Seam thickness : 2.08m to 3.0m ( Mine no-1) &1.97m to 3.03m ( Mine no-3)

iii) Av. pillar size (Centre to Centre) : 28m x 28m ( Center to centre)

iv) No. of Headings in a panel : 5 headings

v) Panel width : up to 153m

vi) Panel length : up to 850 m

vii) Development height : seam thickness (>1.5m) up to 3.0m

viii)Extraction height : Full seam thickness or max. 4.50m



ix) Roadway / gallery width : 4.2m (Existing)

( Note : The seam is mostly developed & Depillared within the leasehold of Kedla underground

except a small patch in the mining area of Mine No-1. Hence, the proposed pillar sizes are as per the

size of existing developed pillars and gallery sizes are as per the existing gallery size of seam-VIII).

Seam-VI

i) Depth of the panels from Surface : 59.98m-137.85 m (Mine No-1)

& 40.91 m – 133.24 m ( Mine no-3)

ii) Seam thickness : 0.21m to 1.37 m ( Mine no-1)

2.10m to 3.93m ( Mine no-3)



v) Panel width : up to 153m



viii) Extraction height : Full seam thickness or max. 4.50m


( Note : The seam is virgin and it is contiguous with seam-VA in mine no-3 area. Seam-VI is

workable in the mining area of mine no-3 only. Hence, the proposed pillar sizes of seam-VI are as

per the size of existing developed pillars and gallery sizes of seam-VA).

Seam-VA

i) Depth of the panels from Surface: : 60.44m-140.94 m( Mine No-1)

46.24 m –138.06 m( Mine no-3)

ii) Seam thickness : 3.03m to 5.86 m ( Mine no-1)

4.16m to 5.01m ( Mine no-3)



v) Panel width : Max up to 153m



viii) Extraction height : Full seam thickness or max. 4.50m


( Note : The seam is partly virgin in mine no-1 &3 area. In part of the area it is developed having pillar

sizes 28m x 28m with gallery size 4.2m. Hence to maintain the uniformity of pillar sizes, the pillar size

proposed for the virgin area is as that of existing developed pillar size.)



8.6 METHOD OF PANEL DEVELOPMENT

Panel Layout: It is proposed to develop trunk roadways & working panels with 5-heading/galleries,

having pillar size as suggested above. The heading would be joined at regular intervals, at a

distance equal to applicable pillar size, by driving level galleries along dip-rise. It is proposed for

uniform pillar size. The pillar size will be 28m (centre to centre) & gallery width will be of 4.2m. During

development of a panel, gallery height would be the seam height or maximum 3.0m where thickness

is more than 3.0m.

System of Panel Development: It is proposed to develop 5-headings in a panel with a view to

optimise the resources utilisation in achieving higher production. Total available faces would vary

from 9-11 (depending on the face position). Depending upon the number of equipment, the

distribution of work load in headings may be as follows:

Three faces for dressing ,drilling & supporting operation

Three faces for charging and blasting

Three faces under loading operation by SDL

Remaining faces for other production & safety related works.

Sequence of operations during panel development: The B&P panel consists of a number of faces

where activities essentially consisting of Coal Preparation, Supporting & Coal Loading are required to

be performed. The sequence of operation is cyclic and requires sequential operations/activities of

drilling, charging & stemming, blasting, fume clearance, dressing & supporting, coal

loading/evacuation by SDL, cleaning/dressing and preparing for next cycle of operation.

Simultaneously, different operations/activities are continued at different faces. Considering the

manpower and face equipment, the different activities are needed to be optimised for enhanced

production and productivity.

The winning of coal would be done by” drilling and blasting off the solid”

Drilling would be done by the drilling crew using UDM (Universal Drilling Machine)

Drilling pattern would be such to achieve maximum pull in a blast.

After completion of drilling, the shot holes will be charged by explosives (permitted) followed by

appropriate stemming (compaction) for efficient blasting by the shot firing crew.

Coal is blasted off-the-solid by the shot firer after alerting & withdrawing the manpower from the

faces.



After blasting of the faces, it should be cleared from the blasting fumes by appropriate ventilation

by auxiliary fan before re-entering the face, properly dressed, & supported as per approved

‘Systematic Support Plan’.

Holes for support and coal preparation shall be drilled by UDM.

The green unsupported roof at faces is supported. This is necessary for safe working of person

& equipment under supported area. Supporting of green roof should be done by roof bolting.

The faces are then examined for misfires, blown out shots/ blown through shots etc and

condition of roof and sides after blasting.

If any misfire occurs, it should be carefully dealt as per CMR 1957.

Blasted coal would be loaded by SDL on to link / face conveyor which will further discharge on to

the Gate Belt conveyor.

Development Height & Horizon: As the seam thickness in the property proposed for B&P with SDL

is generally more than 3.0m in seam-VA , the development height for seam VA have been proposed

as 3.0m or its full seam thickness(where seam thickness is less than 3.0m). It is proposed to make

the panel development along floor of the seam.

In case of seam VI & VIII, the seam thickness is generally varying from 2.0m to 4.0m. Therefore, the

development heights for seam VI & VIII have been proposed as 3.0m or its full seam thickness

(where seam thickness is less than 3.0m). It is proposed to make the panel development along floor

of the seam. The immediate roofs of the seams are generally carbonaceous shale. Hence, for safe

working, it is proposed to leave 0.6m coal in the roof. This will result the reduction of extractable

seam thickness. Accordingly development reserve of the seams has been estimated in this report.

8.7 METHOD OF PANEL EXTRACTION : Depillaring of panels has been proposed only for seam-

VIII in mine no-1. In other seams only development is proposed with the assumption that the

developed pillar will be extracted by opencast which will provide better coal recovery in comparison

to depillaring by underground mining method. In seam-VIII, most of the area is depillared. Only a

patch is left for development & depillaring. Therefore depillaring of seam-VIII in remaining area has

been proposed.

Once the panel is developed up to the end of the panel (mine boundary), the extraction of the

developed pillar would be commenced from the dip most boundary or end of the panel and gradually

retreats towards the main / auxiliary trunk headings. The equipments, which are proposed for panel

development, will be used for the extraction of the pillars (for seam-VIII only). Extraction of pillars



below surface features and within its safety barriers are not proposed. While extracting the pillars,

diagonal line of extraction is proposed to be followed.

Panel Layout & system of extraction: The panel layout & system of pillar extraction would remain

same as followed in traditional pillar extraction for Bord & Pillar technology with SDL. During

depillaring operation, each developed pillar would be splitted in two equal parts by driving a split

gallery along the level / strike, having width of gallery 4.2m.The split pillar on dip side would be

extracted first from the split gallery by slicing method. The last part of the split pillar on rise side

would be extracted from the original gallery.

Sequence of operation in Pillar Extraction:

For depillaring, firstly splitting of the original pillar is to be done by driving the split gallery of the

dimension same as original gallery

The operation of splitting of pillars may extend up to maximum of two pillars ahead of the

diagonal line of extraction (i.e, two pillars ahead of pillar under attack).

The split pillar would be extracted by slicing. The dimension of the slices should not be less than

the dimension of the split gallery. The width of rib pillar between two slices may be 1.8 –2.0m against

goaf. The number of slices in a split pillar will be 3 or more depending upon the pillar size. While

retreating, these ribs may be judiciously reduced during extraction of split pillar.

The depillaring of pillar in a SDL panel may be executed by maintaining the diagonal line of

extraction (preferably 45o).

The panel would be preferably extracted by retreating from dip to rise.

During depillaring, the working faces would comprise of split faces and slices. At each working faces,

the mining operation is of cyclic nature and consists of same activities during development

(described earlier).

8.8 FACE EQUIPMENT

The list of equipment in a SDL panel may be as under:

SDL (Side Discharge Loader) : 3

(Low Height SDL)

UDM (Universal Drilling Machine) : 2

(Low Height UDM)

Electric Rotary Coal Drill : 1 (stand bye)



Portable Bolter : 1 (stand bye)

Link Conveyor : 3

Auxiliary Fan : 2

Face Pump : 2

Other equipment like Endless haulage, Gate Belt Conveyor etc would be working in the panel for

uninterrupted operation within the panel. Two SDL panel will be worked simultaneously having three

SDL & two UDM in each panel.

(Note: As per GR of the block, the seam gradient within the mining area varies 5 degree to 10 degree

where as the seam gradient provided by the project varies from 1 in 7.3 to 9.7. As per the colliery

data and GR data this property may be suitable for deployment of LHD / CM also. Presently, the

development is in progress with SDL in seam VA. As per discussion with the project official ,

HoD(Env & Forest),CCL & Regional director, it was said by the project authority & HoD(Env &

Forest),CCL that the seams where present underground working is going on with SDL is already

considered in the proposed kedla opencast ( 6.0MTY) and it will be extracted by opencast. Since,

kedla underground is an existing running underground mines and it can not be stopped immediately.

Hence, prepare a feasibility report for the kedla underground with some additional SDL having target

capacity of the project around 0.18 MTY with peak production of 0.22 MTY. The same have been

communicated in form-I of Kedla underground for EMP approval. Accordingly report has been

prepared for kedla underground.)

8.9 SUPPORT SYSTEM : As per data provided in mine capacity assessment of Kedla

underground, the RMR of seam-VA is 42.4 & 52.8. Considering lower value of RMR, the support

requirement with cement capsule and resin has been analyzed and it is found that bolting with resin

will require less no of bolts than cement capsule. The cost of bolting per tone of coal is lesser in case

of bolting with resin. Therefore roof bolting with resin capsule have been proposed in this scheme.

A. Bolts Requirement at different location with cement capsule

Particulars Gallery

Width(m) RMR

Rock Load(Te/sqm)

Row & Bolt Spacing(m)

No. of bolts/row

Strength/bolt(Te) for 22mm rod

Factor of

Safety

Permanent Roadways Junction 4.2 42.4 4.53 1.2 4 13 2.28

Permanent Roadways 4.2 42.4 4.53 1.2 4 13 2.28

Temporary Gallery 4.2 42.4 4.53 1.2 4 13 2.28



Temporary Roadways Junction 4.2 42.4 4.53 1.2 4 13 2.28

A. Bolts Requirement at different location with resin capsule

Particulars Gallery

Width(m) RMR

Rock Load(Te/sqm)

Row & Bolt Spacing(m)

No. of bolts/row

Strength/bolt(Te) for 25mm rod

Factor of

Safety

Permanent Roadways Junction 4.2 42.4 4.53 1.8 3 25 2.19

Permanent Roadways 4.2 42.4 4.53 1.8 3 25 2.19

Temporary Gallery 4.2 42.4 4.53 1.8 3 25 2.19

Temporary Roadways Junction 4.2 42.4 4.53 1.8 3 25 2.19

In case of junction 25% more bolting density has been proposed for safety of the mine. However

detailed SSR should be prepared and approved by DGMS and it should be implemented as per

approved SSR.

8.10 SUBSIDENCE

The proposed method of depillaring for seam VIII is Bord & Pillar with caving. The amount of

subsidence for seam-VIII comes around 0.8m. The tensile strain generated for maximum depth of

100m (seam-VIII) will be around 12mm / m which beyond permissible limit and it will impact the

surface topography by generating the surface cracks 50mm to 100m width with mark able

depression over the depillared panel. In case of shallower depth the amount of strain generated

(25m depth, (assuming 10m of weathered mental & 15m of hard cover)) will be around 30mm / m.

This will show the wider crack with depression over the panels and may cause tilting or fall of tress

falling within the crack zone. This scheme doesn’t envisage the depillaring of seam-VI & VA, hence,

no impact assessment has been done for the depillaring of seam VI & VA.

8.11 PRODUCTION PARAMETERS

Two SDL districts have been proposed for this scheme, the productivity of one SDL has been

considered as per CIL norms (100 Te / day / machine).

Production from SDL : @ 100TPD / Machine



Production from each panel with three SDL : 3x100 TPD = 300TPD

Production from SDL Districts with two panels : 2x300TPD = 600TPD

Total SDL production from the project : 0.18 MTY (600TPD)

Peak production from the project : 0.22 MTY (733 TPD)

8.12 SCHEDULE OF SDL PROCUREMENT

The SDL procurement schedule is as under:

Sl.

No.

Particulars

of Major

Equipment

Population Year of Phasing

Existing New Y1 Y2 Y3 Y4 Y5

1. SDL

Set-1

4 4

2. SDL

Set-2

Nil 2 2

8.13 PRIOR PERMISSION REQUIRED FROM DGMS

a) Permission to work below HFL

b) Permission to work contiguous property.

c) Permission for depillaring of panels in seam-VIII.



CHAPTER-IX

MINING SCHEDULE

9.0 PRODUCTION SCHEDULE

The production schedule of Kedla underground is as under:

Year Mine / Seam

Production (MTY)

Av. GCV (Kcals / Kg)

Year Mine / Seam

Production (MTY)

Av. GCV (Kcals / Kg)

1 Mine No-1 / Seam-VIII

0.09( Existing) 6044.26 11 Mine no-3 / seam VA

0.18 5844.24

2 0.09(Existing) 12 Mine No-3 / Seam-VI

0.18 6298.09

3 0.14 13 0.18

4 0.18 14 0.18

5 0.18 15 0.18

6 Mine No-1 / Seam VA

0.18 5976.86 16 0.18

7 0.18 17 0.18

8 0.18 18 0.18

9 0.18

10 Mine no-3 / seam VA

0.18 5844.24 Total 3.02

(The average GCV of the seam shows the weighted average GCV of that particular seam)

9.1 ROM QUALITY

The ROM quality of coal produced from the mine will boe of W-III & W-IV.( having ash% from 24 to

30%). Year-wise ash percentage wise coal production is shown in above table. The mine wise seam

wise weighted average GCV of the ROM coal produced from the proposed kedla underground is as

under :

S.N Mine Seam Average GCV(Kcal/kg)

1 Mine No-1 Seam-VIII 6044.26

2 Mine No-1 Seam-VA 5976.86

3 Mine No-3 Seam-VA 5844.24

4 Mine No-3 Seam-VI 6298.09



CHAPTER-X

UNDERGROUND TRANSPORT

10.0 UNDERGROUND TRANSPORT

Centralized coal evacuation system has been proposed in this report. It is proposed to connect mine

no-1 & mine no-3 with set of drifts in seam VA for coal evacuation and material supply. Seam VA in

mine no-1 area is already connected with reverse drift from seam-VIII. It is proposed to evacuate the

coal produced from seam-VIII (development & depillaring both) with series of belt conveyors via

reverse drift & drift connecting mine no-1 & mine no-3 from mine no-3 main trunk belt conveyor. It is

proposed to evacuate the entire coal produced from seam VIII, VI & VA from mine no-3 centrally.

10.1 COAL EVACUATION SYSTEM FOR SEAM-VIII: The link belts of the panel will discharge

coal on to the gate belt of the individual districts. Gate belt of the panels will discharge coal on to the

trunk belt of the seam. This trunk belt will discharge coal on to belt of the reverse incline belt. This

reverse incline belt will discharge coal on to the belt installed in the trunk headings of seam-VA in

mine no-1 & it discharges the coal on to conveyor belts in drift connecting mine no-1 & mine no-3

with the help of reclaiming belt. This drift belt will discharge the coal on to the trunk belt of mine no-3

which will finally discharge on to surface bunker conveyor and finally in to surface bunker.

10.2 COAL EVACUATION SYSTEM FOR SEAM-VA (MINE -1): The link belts of the panel will

discharge coal on to the gate belt of the individual districts. Gate belt of the panels will discharge coal

on to the trunk belt of the seam. This trunk belt will discharge coal on to the belt installed in the drift

connecting mine no-1 & mine no-3 with the help of reclaiming belt. This drift belt will discharge the

coal on to the trunk belt of mine no-3 which will finally discharge on to surface bunker conveyor and

finally in to surface bunker.

10.3 COAL EVACUATION SYSTEM FOR SEAM-VI (MINE-3): The link belts of the panel will

discharge coal on to the gate belt of the individual districts. Gate belt of the panels will discharge coal

on to the trunk belt of the seam. This trunk belt will discharge the coal on to the trunk belt of mine no-

3 through staple pit which will finally discharge on to surface bunker conveyor and finally in to

surface bunker.



10.4 COAL EVACUATION SYSTEM SEAM-VA (MINE -3): The link belts of the panel will discharge

coal on to the gate belt of the individual districts. Gate belt of the panels will discharge coal on to the

trunk belt of the seam. This trunk belt will discharge the coal on to the main trunk belt of mine no-3

which will finally discharge on to surface bunker conveyor and finally in to surface bunker.

Proposed Belt parameters: The proposed sizes of gate and trunk belt conveyor for coal evacuation

are of 1000mm. Link belts have been proposed as 800mm width. The details of the belts have been

given in the concerned appendices of the report.

Bunker Capacity : No underground bunker has been proposed in this scheme. One shift

coal storage capacity in bunker (2 x 100Te capacities) has been proposed at surface.



CHAPTER-XI

MINE VENTILATION

11.1 VENTILATION REQUIREMENT

The air requirement at LVCs of different districts has been estimated considering the various statute

of CMR 1957. The details of estimated air requirement at LVC are as under:

Estimation of air Requirement for the Kedla UGP(0.18 MTY)

Unit

Production in a day from ventilating

District

Manpower in the

largest shift

Width of roadway(m

)

Height of roadway(m

)

Air at LVC as per

manpower(m^3/Sec)

Air at LVC as per

production(m^3/sec)

Air at LVC as per

Velocity of air

(m^3/sec)

Air at LVC as per Temp>35

dgree (m^3/sec)

Air at LVC as per

statute(m^3/sec)

SDL District1

300 163 4.2 3.0 16.30 12.50 6.3 12.6 16.30

SDL District2

300 163 4.2 3.0 16.30 12.50 6.3 12.6 16.30

Total Require

ment 32.60

With the above table it appears that the total air requirement at fan point will be 32.60 m^3 / sec.

tentatively, mine resistance for the proposed kedla underground is estimated as 0.17 gaul. The

estimated motor power of the main mechanical ventilator is as under

CALCULATION OF MOTOR POWER FOR MAIN MECHANICAL VENTILATOR

Quantity of air required at LVC of As per Thumb Rule

District 1 16.3

District 2 16.3

Total Quantity of air Required 32.6

Assuming 60% as VEQ, Quantity of air required from fan point 54.33

Mine Resistance 0.17

Fan Pressure 487.83

Required Air Power 26505.21

Efficiency of Transmission 0.9

Fan Efficiency 0.6

Estimated Motor Power 49.08372568

Estimated Motor Power with 10% allowances 53.99209825 Say 55

KW



The existing kedla underground has two main mechanical ventilator installed in mine no-1 & mine no-

3. The fan installed in the existing kedla underground is as under:

Mine / Incline Fan Type Location of Fan

Mine No-1 PV200 In Air Shaft up to Seam-VIII

Mine No-3 PV 160 In Incline up to seam-VA

The existing fan of kedla underground will meet the requirement of proposed kedla underground.

Hence, no provision has been made in this scheme for main mechanical ventilator. However, a lump

sum provision has been made in this scheme for rationalization of ventilation. However, fresh

ventilation study has been proposed in this scheme to improve the ventilation efficiency.

11.2 PROPOSED VENTILATION SYSTEM

While working in seam-VIII, the existing ventilation system will continue. The return of seam-VIII will

be through airshaft of mine no-1. In case of seam-VI & VA working, it is proposed that the return of

seam-VA will be through mine no-3. The fan installed at 3C incline of mine no-3 will serve as the

return for mine no-1 & mine no-3. A drift connecting mine no-1 & mine no-3 has been proposed in

this report. However, the detailed ventilation study is proposed in this report.



CHAPTER-XII

WATER MANAGEMENT, PUMPING & DRAINAGE

12.1 INTRODUCTION

The Pre-feasibilty report for the proposed Kedla underground mine has been planned for targeted

production of 0.18 MTY of coal. The tentative estimate for the make of water has been done on the

basis of rain fall and natural inflow of ground water. The pumping system for the project has been

proposed accordingly.

12.2 ESTIMATION OF QUANTITY OF WATER FOR PUMPING

12.2.1 Source of water

The different source of water inflow into this project is as under:

i) Percolation of water due to rain fall within the surface area of the proposed UG.

ii) Seepage of water from the strata/ ground water.

iii) Seepage due to goaved out working of seam-VIII.

iv) Percolation of water due to spraying at coal faces .

12.2.2 General Consideration / Assumption

The following assumptions and available data of the proposed mine :

a) The maximum rainfall in the mine area during the monsoon period.

b) The average rainfall during the monsoon has been considered as 9.97mm per day. The

average rainfall during monsoon period i.e. 4 months (120 days) has been taken as basis of

calculation.

c) It is presumed that 33% (1/3 rd) of rain water falling in the catchments area will percolate

down the mine after evaporation and natural drainage.

d) Natural make of water is assumed to be 10% of the percolation due to rain fall and proximity

of nearby Chutua nala.

e) Percolation of rain-fall water for the area of caving due to depillaring which has been

proposed during period of operations.

f) Catchments area has been considered as 3.33 Sq.km.



g) Pumping system to be capable of pump out 24 hours make of water in effective 18 hours of

pumping.

12.3 MAKE OF WATER

The make of water for the proposed kedla underground is around 753 cum/hr (208lps). Pumping

system has been proposed accordingly.

12.4 PUMPING CAPACITY

The proposed pumping capacity is 240lps.

12.5. PROPOSED PUMPING SYSTEM

Face pump will discharge water into the main sump. From main sump water will be discharged in to

surface through inclines via settling tank. Accordingly provisions have been made in this report.The

seam wise pumping system is as under:

Seam-VIII : The existing pumping arrangement of the mine no-1 will continue till its

exhaustion.

Seam-VA : The centralized pumping from mine no-3 is proposed. The water accumulated in the

main sump of seam-VA of mine no-1 will be discharged in to main sump of seam-VA in mine no-3

through drift. From main sump of seam –VA in mine no-3, water will be pumped out to surface

through inclines. Accordingly provisions have been made in this report.

Seam-VI : Water accumulated in the main sump of seam-VI will be brought in to the main sump of

seamVA in mine no-3 through staple pit and it will be finally pumped out to surface through inclines

of seam-VA in mine no-3.

Note : Some of the additional pumps have been proposed in this report. Where as the existing

pumps are also proposed to be utilized for the project.



CHAPTER-XIII

COAL HANDLING PLANT & DESPATCH

13.1 INTRODUCTION

Kedla UG mine has been planned for target capacity of 0.18 mty. The coal handling plant shall have

facilities for receiving coal from main incline conveyor, conveying, storing and loading into tipping

trucks for onward transportation to kedla washery. The coal handling plant will also have been

provided with suitable running repair facilities.

13.2 DESIGN PARAMETERS:

The Coal Handling Plant has been designed based on coal production as well as following factors

have been considered for finalising the location of the CHP.

a. Incline Mouth

b. Topography

c. Mine boundary

d. Loading point

e. Overall economy of the system.

13.3 BASIC DATA

The following data have been considered while formulating the coal handling plant :

Particulars Data

Production capacity of the project (ultimate) MTY : Nominal-0.18mty,

Peak-0.22 mty

No. of working days considered / year : 300

No. of working shifts / day : 3

No. of effective working hours / shift : 5

Quality and other parameters of coal

Average Grade of coal : W-III / W-IV

Feed size of coal to the coal handling plant(mm) : ROM form SDL

Mode of despatch : Truck

Consumer : Kedla washery



Loading hours/day : Round the clock

Life of the project (years) : 18 years

13.4 SYSTEM CAPACITY

The system capacity of the coal handling plant have been designed in such a way so that it can

handle fluctuations in the coal production within an overall rated production of all the three seams

from the mine. There is sufficient cushion to absorb fluctuations in coal production.

13.5 DESCRIPTION OF CHP

The CHP shall have the following important units :

a) Receiving arrangement of underground coal

b) Storage of coal in over head hoppers

c) Load out System (Truck loading arrangement)

d) Dust suppression, plant safety, fire fighting system etc.

e) Road weigh bridge.

13.5.1 RECEIVING ARRANGEMENT OF COAL

The main incline conveyor will feed coal to the receiving transfer house. From this receiving house,

coal will be given onward to receiving surface hoppers.

13.5.2 STORAGE & RECLAMATION

The coal from transfer house at coal touch point will be reclaimed for onward despatch to 2x100te

overhead hoppers by 1000mm conveyor.

13.5.3 LOADING & DESPATCH

Surface CHP will comprise of two numbers of truck loading hoppers of 100 te capacity each fitted

with motorised sector gate below the hoppers. Ground stock storage has also been provided at the

end of the elevating conveyor of the CHP. The coal will be loaded into the truck below the hoppers

with the help of motorised sector gate. From ground stock coal will also be loaded to the trucks by FE

loader for onward transportation of coal to nearby kedla washery. General arrangement of Truck

loading hoppers is given in drawing nos. R3-E&M-M2808.



13.5.4 DUST SUPPRESSION

Necessary measures for dust suppression and ventilation have been provided at various places.

Dust suppression arrangement shall be provided at loading points.

13.5.5 PLANT SAFETY & FIRE FIGHTING SYSTEM

For plant safety and fire fighting dry type fire fighting equipment have been provided.

13.5.6 WEIGHMENT

One no of electronic road weigh bridge of 60te capacity complete with all accessories have been

provided to weigh the loaded trucks.

13.6 CAPITAL ESTIMATE

The estimated capital costs for the surface coal handling plant have been given in appendix A.3.4.



CHAPTER-XIV

WORKSHOP, STORE & MAGAZINE

14.1 WORKSHOP: A unit workshop has been proposed for the Kedla UGP to cater the day to

day requirement of the mine. Although, the major overhauling and other works for pumps and

SDLs are proposed to be carried out either contractually by the outside party or by the central

workshop of CCL.

14.2 STORE: A unit store has been proposed to cater the day to day requirement of the mine.

143. MAGAZINE : The existing magazine of kedla underground shall be utilized for

the proposed underground project. Considering one week requirement the capacity of magazine

should be for 1800 kg explosive and 4000 detonator and it should be approved under Indian

Explosive Act. It is being communicated by the area / mine official that the existing magazine has

the sufficient capacity for storage of above said amount of explosive and above said number of

detonator. Hence no provision for magazine has been made in this report.



CHAPTER-XV

POWER SUPPLY, ILLUMINATION & TELECOMMUNICATION

15 .1 INTRODUCTION

Kedla underground mine is located in East Bokaro Coalfield of CCL. The mine is being planned for a

target production of 0.18 MTY with 2 numbers of SDL districts.

15.1.1 POWER SUPPLY

Source of power : 2 x 10 MVA, 33 /11 kV Kedla Regional sub-station is the nearest source of

power supply to the Kedla UG mine.

Existing Power Supply system : At present Kedla UG sub-station having installed capacity of 2x1

MVA,11/3.3 kV receives power through single circuit 11kV OHTL of approximately 3 km in length

from Kedla Regional sub-station. This sub-station caters the existing mining load including colony

load.

Proposed Power Supply System : Both the existing transformers are overloaded and to cater the

increased load ,It is proposed to install 2x3.15 MVA, 11/3.3kV, sub-station at Kedla UG sub-station in

place of existing sub-station . It will receive power at 11 kV through existing 11 kV OHTL from Kedla

Regional Sub-station. The details of different installations in the substation are as given below:

a) Outdoor Installations:

11 kV O/D bus Sections for receiving power

11 kV, O/D gang operated Isolator with/without earthing switch/with earthing switch & DO

fuses

11 kV, O/D type C.Bs, 350 MVA, 630 A

L.A. for 11 kV system voltages

Power transformers, O/D, DY11, 3 .15 MVA, 11 /3.3 kV: - 2nos.

(restricted earthed):

Lighting transformers, 250 kVA, pole mounted, 11/0.23 kV (L-L): -1nos.

b) Indoor Installations.

11 kV Remote control panels for C.B.s: 4 Nos.

3.3 kV, Sectionalized I /D type Switch Board .

415 Volt L.T. Distribution Board .



550 Volt power distribution board

Capacitor bank, 3.3 kV, with APFCR panels etc

Indoor Illumination.

110 V D.C. Distribution Board.

Battery, Battery Chargers.

Earthing with grid.

3.3 kV Sectionalized Indoor type Switch Board

Substation (Refer Plate No. R-3/E&M / E2785 )

a) One number 16-panel 3.3kV I/D type sectionalized switch board energized from the

secondary of the two transformers rated 3.15 MVA, 11/ 3.3 kV, installed at the S/S would control the

power supply to all the surface and UG installations/equipment of the project .

The different functions of the 16 nos. VCBs in this switchboard will be as described below:

630 A for Secondary Control of 3.15 MVA transformers: 2 nos.

630 A for Sectionaliser Control: -1 no.

630A for U.G. Feeder control: - 2 nos.

400 A for O/G Control to CHP & Workshop: - 2nos.

100A for O/G Control to Direct haulage: -1 no.

630 A for colony power control:- 2 nos.

400A for Capacitor Banks Control: - 2 nos.

400 A for primary control of 250 kVA transformers:- 2 nos.

400 A as Spare:- 2 nos.

b) One no. 550 V, 7 panel sectionalized indoor type switch board fed from the secondary of

the two transformers rated at 250 kVA, 3.3/0.55 kV would be installed in the substation for controlling

the power supply to the direct haulage and ventilation fan motors installed on surface. The various

functions of the circuit breakers in the switchboard will be as follows:

400 A CB for secondary control of 250-kVA transformers: -2 nos.

400 A CB for sectoinaliser control: - 1 no.

100 A CB for Direct Haulage Control: - 1 no.

100A CB for Ventilation fan control: - 1 nos.

100A CB as spare: - 2 no.



c) A separate 8 panel 415 Volt, 3 phase & N, indoor type switch board fed from the

secondary of the 250 KVA, 11/0.23 KV(L-L) pole mounted lighting transformer has been proposed to

be installed for controlling the various lighting and other L.T loads in and around this substation. The

lighting distribution board will comprise the following:

1 no. Incoming control 400 A, 4 pole MCCB.

4 nos. O/G control 63 A, 3 pole MCB

3 nos. O/G control 32 A, 2 pole MCB.

Connected Load / Maximum Demand (Refer Table : 15.1 A) : As per the proposals made in this

report, mine wise major electrical equipment / installations and their operating loads are as given

below:

(i) Total connected load in operation : 3663 kW

(ii) Maximum Demand at an Improved P.F. 0.98 : 2021 kVA

The transformers for the sub-station have been selected considering overall power

factor of 0.98, starting of large HT motors and 100 % stand-bye capacity.

Protection of Substation, control & signaling : Circuit breaker shall in conjunction with current

transformer offer protection of the transformers against O.C, S.C, and E.F. These circuit breakers

shall also trip for internal fault of transformers actuated by differential relays and winding temperature

relays. Following protections have been envisaged.

(i) Combined IDMT and high set instantaneous relay consisting of 3 O.L. units (range 50 to 200%), 1

E.F. unit (range 10 to 40 %) and3 high set instantaneous units (range 400 to 1600 %)

(ii) Auxiliary relays for oil and winding temperature and alarm.

The live parts of the circuit breakers shall be properly shrouded as per relevant safety rules. The

control switches built in the control panel in the substation room, which contains all the relays and the

rectifying units also, shall perform remote control of 11 KV circuit breakers.

The following system of signaling will be used in the sub-station.

Signaling to inform personnel about automatic tripping of circuit breaker due to fault.

Warning signal about occurrence of abnormality in any particular device.



Signaling to show actuation of automatic and protective relays.

Similar control, protection devices are to be incorporated in the 3.3kV indoor panels also. Insulation

monitoring device is to be provided in the 3.3 kV bus.

Protection against Lightning :

For protection against lightning, lightning arrestors conforming to IS: 3070 and IS: 4004 will be

provided in the substation yard. The lightning arrestors on the 11 kV side are to be provided with

counters so that preventive actions can be taken. Shield wires will be provided for outdoor yard

equipment to protect them from direct strokes. For protection of building from lightning, spikes will be

provided over the building and these will be interconnected by means of flats to form a grid. This grid

will be connected to the earth pits at the four corners of the building by means of down conductors.

Interlocking System :

The air break isolators associated with the 11 KV circuit breakers will be interlocked with the circuit

breakers to avoid mal- operation. The 3.3 kV sectionaliser C.B. in the 3.3kV switch board will have

electrical interlock with the incoming circuit breakers to avoid parallel operation of transformers.

Primary and secondary C.B.s are to interconnected for inter tripping, i.e. secondary control C.B. shall

trip automatically when the primary control C.B. trips.

Earthing :

Main earthing grid shall be provided around the periphery of all the substations for interconnection of

grids as well as to earth all the electrical equipment. Substation earthing shall conform to IS:

3043(current). Motor body, switch gears, enclosures, 3.3kV switch boards, transformer tanks,

marshalling boxes of transformers, conduits of wiring, support structures, cross arms of O.H. line

poles, cable armouring, earth terminals of surge arrestors, cable trays, earthing switches, contactors

associated with isolating switches shall be earthed at two separate and distinct connections to earth

through earthing strips as per IE rule 1956 & IS: 3043(current). In addition to above, earthing of all

the motors would also be provided through armouring of various feeder cables. Main earth bus strips

shall not be less than 65mmx5mm. Interconnecting strips shall not be less than 25mmx5mm. Cable

trays shall not be treated as earthing conductors, Cable trays shall be earthed at every 10m intervals.



Separate earth pits for earthing of neutral of transformers and lightning arresters shall be provided.

All earth connections and joints to the earth bus will be done by proper welding/bolting. The

resistance to earth shall not exceed 1 ohm. Test pits shall be provided at all interconnecting grid

connections. Earthing of different equipment in the U.G. would be provided from the substation

through the armouring of cables.

Separate earth pits would also be constructed around workshop, CHP. GI strips of adequate size

connecting the main earth bus laid around the workshop would properly earth all the drives in the

workshop etc.

Restricted earth neutral system has been envisaged for 3.3 kV side distributions. The neutral of all

the power transformers in the substations / quarry shall be earthed through resistance with individual

earth pits.

Energy Consumption : Estimated energy consumption by different groups of electrical

receivers at targeted rate of production works out at 4.82 MkWh (Refer Table: 15.1 A)

System Voltages:

i) Incoming supply Voltage : 11kV

ii) U.G. power distribution : 3.3 kV

iii) Utilisation Voltage of Ventilation fan : 0.55 kV

iv) CHP/ Workshop power supply : 3.3 kV

v) Utilisation Voltage Of Pumps : 3.3 / 0.55 kV

vi) Utilisation Voltage Of Other U.G. equipment : 0.55 kV

vii) Workshop Supply Voltage : 3.3 KV

viii) Workshop utilization voltage : 0.44 kV.

ix) Surface / U.G. Illumination : 230 V / 110 V

Power factor Improvement

In order to maintain high system power factor of around 0.98, 2 sets of capacitor banks each rated at

3.3 kV, 634 kVAr would be installed at the two bus sections of the 3.3 kV sectionalized switch board

at the main substation building. The capacitor banks would be connected through automatic power



factor correction and relay panels having contactors so as to connect and disconnect the required

number of units at a time depending upon the loading pattern at the substation.

Under ground Power Supply Distribution

( Refer Plate No.R-3/E&M /E2786) : It is proposed to install one 3.3 kV, FLP, mining type

underground power distribution center (P.D.C.), at suitable place in the main trunk route, depending

upon the position of working in underground. This will receive power at 3.3 kV by means of U.G

feeders drawn from the main substation in the following ways as described below:

a) U.G Power Distribution Centre :

U.G PDC (12 panel) is proposed to receive power from the main surface substation by means of

PVCDWA power cable drawn through incline. PDC will comprise the following 3.3 kV Circuit

Breakers:

PDC will comprise the following 3.3 kV FLP circuit breakers.

Incomer Control: -2nos.

Sectionaliser control: - 1 no.

Outgoing control to Tran switch Units.: - 3 nos.

Outgoing control to Main HT Pumps: - 1 no.

Outgoing control to LT Pumps- : - 1 no

S.D.L. District: 2 no.

Spare: - 2 No.

These FLP circuit breakers in the underground power distribution center shall be of low height,

mining type, FLP suitable for use in underground. The rating of these circuit breakers shall be 400 A,

75MVA, 3.3 kV, 50 HZ. Power would be distributed to various underground load centers through

different Tran-switch units rated at 315 kVA, 3.3/0.55 kV, fed by means of PVCDWA, Cu cables.

Distribution of L.T power i.e. 550 V to different equipment would be made through respective 550 V

controlling air circuit breakers and gate end boxes connected to the secondary of each Tran switch

unit.

Power Supply to township : At present one no. 630 kVA,3.3/0.415 kV ,Distribution transformer is

existing to cater the power demand of kedla UG colony and it receives power from existing 1



MVA,11/3.3 kV power transformer . A lump sum has been provided for expansion/strengthening of

existing colony , in the estimate.

Power Supply to CHP & Workshop : CHP and workshop would be supplied power at 3.3 kV from

the main substations by means of two separate feeders. At the workshop and CHP, power at 3.3 kV

would be stepped down to 0.44 kV for further distribution to different power receivers at these load

centers.

15.2 ILLUMINATIONS

Surface illumination

i) Approach road, colony roads, service roads would be illuminated by 125 / 150 W HPSV lamps in

street light luminaries, mounted on steel tubular poles of 9 m height erected at 30 m spacing.

ii) Illumination of service buildings, offices would be done by 1 x 40 W or 2 x 40 W Fluorescent lamps

or 18 / 23 W CFL lamps.

Underground illumination

iii) Mine roadways, loading points, pump houses etc. would be illuminated with FLP / mining

type fittings provided with wire guard protection, weather proof suitable for accommodating single or

twin 20 W fluorescent lamps at 110 volt supply.

iv) Coalfaces would be illuminated with FLP/ mining type fittings (well glass), suitable for

accommodating 2 x 18 W CFL at 110 Volt supply. The fittings shall be provided with reflector,

hemispherical type with strong glass lenses and wire guard protection.

v) Adequate number of FLP lighting transformers rated at 5 kVA, 550/110V have been

provided in this report for this purpose.

15.3 POWER BALANCE / ENERGY CONSUMPTION (Annual/Year-wise)

Based on the deployment of different equipment / installations in all the quarries of the project, a

power balance has been prepared to know the maximum power demand and maximum annual

energy consumption, Maximum Annual Power bill and other related matters of the whole project

(Refer Table - 15.1 A). Year wise phasing of energy consumption and power bill has also been

calculated. (Refer Table 15.2 A)



15.4 SALIENT ELECTRICAL FEATURES & COST ESTIMATE

Salient Electrical Features:

i) Total connected load in operation (kW) : 3663

ii) Maximum Demand at an Improved P.F. 0.98 (kVA) : 2021

iii) Major Transformers : 2 x 3.15 MVA,11/3.3 KV

iv) Energy consumption in MKWh per Annum : 4.8233

v) Maximum Annual Power Bill In Rs. Lakhs : 163.991

vi) Power Cost: in Rs./ t of coal production : 91.106

vii) Specific Energy consumption (KWh /t) : 26.796

viii) Capacitor Banks Provided In KVAr : 1268 KVAr

viii) Lighting Transformer Provided :1 x 250 kVA, 11 / 0.23 kV(L- L)

- 1 No.

Cost Estimate( P&M – Electrical)

The estimated total capital investment on P&M – electrical including the substation buildings has

been worked out. Details of such items are given in Appendix - A.3.2.

15.5 EDP & COMMUNICATION

15.5.1 EDP system facilities :

It is proposed to deploy Electronic Data Processing (EDP) facilities for production planning, control

and project management etc. The system envisages for playing key role in establishment of effective

Data Base Management System (DBMS) and Management Information System (MIS) as below:

- Pay Roll

- Financial accounting

- Inventory control

- Material management

- HEMM utilization, breakdown analysis, idle time analysis etc.

- Production, dispatch schedule and variances.

- Accident records etc.

- Resource utilization etc.

Before initiating action for installation and implementation of the above EDP system, a detailed study

would have to be carried out, with clearly defined system objectives for identifying the data



processing needs and management information system needs of the project. Based on the results

and findings of the study, the system configuration and specification have to be decided.

Internet Facility

An Internet connection is proposed for the project to cater to the needs of information gathering, file

transfer and speedy correspondence by e-mail etc. The main Internet link will be provided by BSNL

by means of Broad band / dial-up modems.

Software

The EDP centre should be equipped with standard application software like MS-Office 2007, MS

Project 2007 & Fox Pro software of latest versions. Anti-virus software like Symantec should also be

used on each machine for protection against viruses.

15.5.2 Voice & Data Communication

Communication : Coal production has become highly capital intensive due to large scale

mechanisation for production and transportation using the modern technology. To cope with

mechanisation, to maintain safety and to improve the efficiency there is a need to establish an

efficient means of voice and data communication. The effectiveness and reliability of decision

making process depends on a reliable means of information exchange among the different units of

surface and underground which totally depends upon the integrated telecommunication systems for

voice and data.

In order to improve operational efficiency of the mine, it is necessary to integrate its operational units,

in underground and at surface, service units, maintenance units, stores, workshops, administration

deptt., road and rail dispatches, etc. with efficient and reliable communication links which may

provide all facilities to be made available for quick decision making, for safety, production and

transportation.

Proposed Communication System : The proposed communication system should cater the need

of voice communication among personnel related to mine operation, administration and equipment

maintenance. The system also takes into account the data communication requirement for mine

operation and planning along with the latest office automation facilities.



While preparing the system, due consideration has been given to the state-of-art networking

architecture involving the communication of voice, data and multimedia over the same network

path, so as to avoid duplicated investment in network and proper conservation of bandwidth.

Communication for Underground :

Central Despatch System : A CDS System having 30 lines, is proposed for U/G Communication.

The system consists of surface unit, isolator and IS Underground Unit including IS telephones.

The Underground units should be intrinsically safe and DGMS approved to use in the Underground

Indian coal mines. The system should have facility to interlink with the surface exchange so that

the persons from any location of the important surface units can communicate to the persons

working in different location of underground. and vice-versa to meet the main requirement of

safety and production.

Surface/Administrative Communication :

To meet all the requirements of data and voice communication, 150 lines of IP Enabled Exchange

is proposed having the following main features:

IP Enabled Exchange : A 150 line automatic telephone exchange has been envisaged for the

effective communication between the various units on the surface. The EPABX will preferably

employ PCM-TDM technique with a non-blocking structure. The EPABX shall have all the latest

features like E1 port, LAN/WAN port, etc. EPABX shall be interfaced with BSNL exchange for

extending external communication having STD & ISD facility. Self-diagnostic facility shall be

provided for EPABX extensions. Sufficient no. of junction lines are to be provided for terminating

BSNL, Tie and Trunk lines.

A. Technical Specification of EPABX

The exchange shall be microprocessor based stored programme control and PCM-TDM switching

with state of art technology. Exchange shall be suitable to be operated with DP, DTMF, digital and

IP telephones.

The line cards slots/channels in the main cabinet must be universal type, so that any type of line

can be used in any line slot/channel and there shall be no limitation in slot position.

Exchange shall have both voice and data switching capacity.



Krone type MDF having capacity equivalent to ultimate capacity of the exchange with GD tubes for

high voltage protection and poly-switches for current protection on all extensions and trunks.

System software shall have auto-diagnostic programme to detect the faults and localize them.

The exchange should support multi-media application as per latest trend. It should be possible to

connect PC’s, host computers etc. without modem through Digital/ISDN line. Exchange shall be

DoT/TRC approved with ISDN facility. The IP Gateway port of the exchange can be connected with

the LAN backbone network for VOIP communication.

B. Networking Facility

Exchanges are required to operate in any one of the following and shall be suitable for both.

i) BSNL junction and extension exclusively for BSNL lines

ii) Exchange should also be able to inter-face directly with OFC/DECT systems, if required.

System should be capable to network with the following types of lines:

a. Loop disconnect tie lines.

b. Ring down hot line.

c. Direct inward dialing trunk and outward dialing trunk. (2W/4W E&M Trunks).

d. ISDN line.

C. Features

a. Flexible numbering scheme

b. Privacy of calls

c. DTMF DID facility junctions.

d. Conferencing

e. Automatic call back on busy extn.

f. Call transfer and Call pick up.

g. Last number radial.

BSNL Communication : It is proposed to provide 6 nos. BSNL telephone extensions to the Mine

Office in order to facilitate external communication and to link the Mine with the BSNL's national

telephone network. The BSNL telephones shall be provided at the offices and residences of

important officials. The BSNL communication facility can be extended by terminating about 5 BSNL

lines on the proposed IP enabled EPABX and configuring the same. Besides fixed line BSNL

telephones, 10 Nos. of BSNL cell one Mobile connection with sets may also be provided to important

personnel of the project.



BSNL 2Mbps Leased Line : A BSNL 2 Mbps Leased Line is proposed for communication with

Area HQ. This leased line shall be used both for voice and data communication with Area HQ. A

multi service voice and data router shall be used in this network. The router will be equipped with 2

Nos. of WAN port and one 1 No. of LAN port minimum.

Specification for Router :

Data Interface : 2 Nos. high speed data interface with DOT-35

1 No. RS-232 Sync/Async port.

1 No. Ethernet LAN port.

Link protocol : V.35/X.21, SDLC and TCP/IP

Protocol support : TCP/IP ,RIP

Management : SNMP

Power Supply : 230V AC +/- 10% single phase.

LAN and Internet : It is proposed to deploy electronic data processing facilities for production

planning, control and project management etc. The system envisages to play a key role in

establishment of highly effective Data Base Management System (DBMS) and Management

Information System (MIS) etc.

The type of computer would be small business computer with broad facilities and also

have specific facilities to carry out :

- Pay rolls

- Financial accounting

- Inventory control

- Material management

- HEMM utilisation, breakdown analysis, idle time analysis etc.

- Production, despatch schedule and variances.

- Accident records etc.

- Resource utilisation & MIS.

Before initiating action for installation and implementation of the above EDP system, a

detailed system study would have to be carried out, with clearly defined



system objectives for identifying the data processing needs and management information system

needs of the project. Based on the results and findings of the study, the system configuration and

specification have to be decided.

management information system needs of the project. Based on the results and findings of the

study, the system configuration and specification have to be decided.

A Local Area Network with 15 PCs is proposed for this project. The PCs will be

connected to a 24 port L2 switch. The proposed network structure will be that of a workgroup.

Suitable OS and other application software will be provided and the network shall facilitate sharing of

information and computing resources amongst different departments/ disciplines. The network shall

be capable to add more nodes as and when the number of users grow and it will be equipped with

the latest state-of-art technology.

Internet connection shall also be provided.

L3/L4 Switch : The L3/L4 Switch shall have 24 nos.of 10/100 ports and gigabit ports for connection

to the distantly located L2 switches. The Switch shall have sufficient backplane and throughput along

with QoS features for both voice & data.

Technical Specification :

-24, 10/100 base auto-sensing ports + expansion module slot for Gigabit module for connecting to L2

switches.

-Standards Compliance - support IEEE 802.3X (flow control), IEEE 802.1p ( prioritization), IEEE

802.1 Q (V-LAN Trunking), IEEE 802.1d (spanning tree protocol)

-Management – have built-in SNMP, Web based and Command Line interface for Management,

SNMP v1/v2/v3 , RMON .

24 port L2 switch : The managed L2 Switch shall be a workgroup switch 24 port 10/100 having a

gigabit uplink port. The switch shall have sufficient backplane and throughput alongwith QoS features

for both voice and data connectivity.

Technical Specification :

- Configuration: 24 Nos. 10/100 Autosensing Ports + 1 gigabit uplink port.

- The switch should support QoS classification of incoming packets for QoS flows based on Layer

2,Layer 3 and Layer 4 fields.

-Standard Compliance- support IEEE 802.3 x ( flow control), IEEE 802.1p ), IEEE 802.1Q (V-LAN

Trunking), IEEE 802.1d ( spanning tree protocol)



-Management- Have built-in SNMP, Web based and Command Line Interface for Management.

SNMP v1/v2/v3, RMON.

Electronic Attendence System : This system shall be for attendance monitoring and evaluation

.The whole attendance system consists of card reader/data collection terminals, hardware and

support software with inbuilt clock and timer .The plastic card with contact less chip /magnetic stripe

having the unique identification will be read by special reader unit, installed at the attendance room .

The card can be personalized by digital printing, thermoprinting or by embossing .

Master_Slave Digital Clock : Four – digit display units indicating hours and minutes , shall be

installed at key location in the administrative building, project office , pit office and other selected

areas .These will be controlled from a master station located in the dispatcher control room . Digits

should be readable in the day and night from a distance of at least 25 meters .

Specifications of UPS

a. Capacity : 2 KVA, Single phase

b. AC Input voltage : 220/230 V, 1 phase +15-20 % variation

c. Frequency : 50 Hz + 5 %

d. AC output voltage : 230 VAC, ! phase

e. Power factor : 0.8 lagging to unity

f. Regulation : Both line and load + 1 %

g.Wave form : Sinusoidal ,< 5 % THD

h. Noise level : 55 db

i. Charger : Constant voltage limited current type, charging time for 90 %

discharged battery maximum 10 hrs.

j. Battery: Sealed Maintenance free ( of total capacity around 3100 watt hours ) Battery Back – up : 4

hrs at full load .

k. Certification : EU?EN?UL?ISO 9001

l. Rack mount Design: 19” mountable with sliding guides.

m. Communication: RS232 interface port & Ethernet port with Web management supports.

Features

a. The 2 KVA UPS with 4 hrs. battery back-up & accessories shall have the facility of input

voltage cut off device to protect the 2 KVA UPS with 4 hrs. battery back-up & accessories against

excessive over/under voltage condition at the input side .

b. The system shall have surge suppression to prevent hardware damage .



c. The system shall have facility for continuous display of load and battery charging

conditions and automatic cut off device to avoid over loading and over charging .

d. The 2 KVA UPS with 4 hrs. battery back-up & accessories system shall be true on-line

state of art based system capable of providing precise sine wave out put to the load .

Testing & Measuring Equipment

a) Digital Multimeter : Hand-held and compact type with necessary probes, cover etc., 4 ½

digit with sharp LCD display

Functions:

a. DC voltage measurement: 500mV to 1000 V +0.025 %

b. DC current measurement: 500mA to 10 A +0.2 %

c. AC voltage measurement: 500mV to 750 V +0.3 %

d. AC current measurement: 500mA to 10 A

e. Resistance measurement: 500 W to 50 MW

f. Easy calibration facility

g. Overload protection in all ranges .

h. Power supply : Battery ( 6 V or 9 V) operated .

i. Frequency : 0.6 Hz to 500 KHz + 0.03 %

j. Capacitance measurement : 50 nF to 50 micro F , + 1.0 %

k. Component test : for diode & transistor

l. Continuity test : Continuity Buzzer

m. Standard Accessories : Test lead, Rubber Holster

c) Power Supply :

The DC power supply of different range is proposed for testing & calibrating of the electronic cards

and equipment. The variable DC output from 0 to 30 V and fixed DC output of +5 V and + 12 V are

proposed in the same power supply unit . The specifications are as under :

Input voltage - 220 V AC + 5 %, 50 Hz

Output voltage - a) 0-30 V @ 0-5 A ( Variable )

b) 5 V ( Fixed output ) @ 3 A

c) + 12V( Fixed output) @ 1.5 A

Display - Digital, for voltage & current

Output polarity - Positive & negative

Protection - Overload

Ripple voltage - Less than 1 MV p-p



c) Tools & Accessories : Suitable tool sets such as screw drivers of different sizes,

soldering iron , desoldering pump solder, wire cutter , wire stripper etc. are required for proper

maintenance of the system .

Budgetary Cost Estimate: Enclosed in Annexure A.3.2

Manpower Requirement: To maintain the Automation, Control and Communication System

suitable manpower requirement is as given below:

Sl. No. Manpower Nos.

1 E2/E3 1

2 Asstt. Foreman/Foreman 2

3 Technician 2

4 Lineman/Helper 2



CHAPTER-XVI

CIVIL CONSTRUCTION & WATER SUPPLY

16.0 GENERAL

The life of Kedla Underground Project has been estimated as 18 years and existing residential and

Service building will be utilized for Kedla Underground Project Hence, No further permanent type of

construction has been proposed for buildings except Rest Shelter. The cost estimate for civil

construction has been prepared based on the cost index.

16.1 COST INDEX & SPECIFICATION OF BUILDINGS

The cost index has been worked out as 3303 with respect to 100 base at Delhi as on 01.10.1976.

The details have been given in Appendix- A.2.3.

16.2 SERVICE BUILDINGS

Provision has been made in this report for construction of Rest Shelter only because P.O. office, Pit

office, E&M Workshop, Sub station, Store, Community Hall, Officers’ Club, Dispensary etc already

exist.. Details of service buildings and statement showing capital investment have been given in

Appendix- A.2.2.

16.3 RESIDENTIAL BUILDINGS

It is not proposed to provide a township for Kedla Underground Project because residential buildings,

50.20% housing satisfaction has already been exist. The manpower provision for this project is 502.

Thus, number of quarters required at 50.22% housing satisfaction is 252. and at 55% housing

satisfaction comes around 276 . The different types of quarters are sufficient to meet the

requirement of residential buildings for the project. The details of the existing quarters are as under :

S.N Type of Quaters No of Quaters

1 D-Type 1

2 C-Type 10

3 Temporary C-Type 5

4 B-Type 23

5 Temporary B-Type 12

6 S.B. Type 10

7 NHS Type 43

8 A-Type 47



9 Miners Type 61

10 Barrack Shed 92

11 LCH Type 40

12 Total 344

The details of number of houses are also given in Appendix A.2.1. Hence, no additional residential

quarters have been proposed in this report.

16.4 ROAD AND CULVERTS

16.4.1 APPROACH ROAD / COAL EVACUATION ROAD

For strenthening of 0.30 km approach road to mine site and construction of 0.20 km for approach

road to Bunkar in mine site, provision has been made. The estimated capital investment for

approach road has been furnished in Appendix- A.8.2.3.

16.4.2 COLONY ROAD

Township already exist at Kedla Underground Project .Hence no new Colony Road is required

Details are given in Appendix- A.8.2.1

16.4.3 APPROACH ROAD TO COLONY

The approach road to the proposed Colony has already been exist

16.4.4 COAL TRANSPORTATION ROAD

No additional provision of Coal transportation road has been made in this report.

16.5 WATER SUPPLY AND SEWERAGE

16.5.1 WATER DEMAND

The potable & industrial water requirement for the project has been assessed as follows:

(i) Potable Water Demand : 238 KLPD

(ii) Industrial Water Demand : 0.024 MLPD

16.5.2 SOURCE OF WATER

No additional source has been considered in this proposal as source of water with water supply

system already exist.

16.5.3 COLONY WATER SUPPLY

Colony water supply system already exist .



16.5.4 COLONY SEWERAGE

Township already exists at Kedla Underground Project .Hence .Hence no new Colony Sewerage is

proposed.

16.5.5 INDUSTRIAL WATER SUPPLY

Industrial water supply system already exists in the Project.

16.5.6 INDUSTRIAL SEWERAGE

A lump sum amount of Rs. 20.00 lakh has been provided for this purpose.

Estimated capital expenditure have been furnished in Appendices A.8.3.



CHAPTER-XVII

MANPOWER, PRODUCTIVITY & TRAINING

17.1 EXISTING MANPOWER

As per the colliery data, the existing manpower (as on June ‘2013) of kedla underground is as under:

Type of Manpower No of Manpower

Executive 27

Supervisor 63

Time / Daily Rated Workers 481

PR worker 194

Total 765

17.2 PROPOSED MANPOWER:

The details of the proposed manpower for kedla underground are as under:

PROPOSED MANPOWER OF KEDLA UG

Types of Manpower Cat UG S / F Total

Category

V 0 5 5

IV 80 10 90

III 62 25 87

II 172 19 191

I 6 3 9

Monthly Rated A- H 41 63 104

Executives E2 - E7 12 4 16

Total 373 129 502

The detailed manpower for the proposed kedla underground is shown in Appendix B of this report.

The existing manpower is more than the proposed manpower for kedla underground. Hence, it is

proposed that the existing manpower will be utilized for the proposed kedla underground.

17.3 MANPOWER PHASING

The phasing of the proposed manpower are as under :

Year 1 2 3 4 5 6 7

Manpower 261 161 457 502 502 502 502

8 9 10 11 12 13 14 15-18

502 502 502 502 502 502 502 502



17.4 OMS : The total manpower proposed is 583. Some of the manpower is

outsourced and some of the manpower is apportioned with the existing kedla opencast. Total 49

manpower have been outsourced where as 33 manpower have been apportioned with the existing

kedla opencast. The OMS estimated with the total manpower and net manpower are 1.17 and 1.36

respectively.



CHAPTER-XVIII

SAFETY PRECAUTIONS & COAL CONSERVATION

18.1 DEGREE OF GASSINESS

The degree of gassiness of the existing kedla underground mine is of degree-I .Hence, for planning

purposes, the degree of gassiness has been assumed as Degree-I. It is proposed that degree of

gassiness of the seam-VI should be freshly determined after opening of the seam for development.

Accordingly provisions have been made in this report.

18.2 GENERAL SAFETY MEASURES

All precautions stipulated under CMR, 1957 and circulars issued by DGMS from time to time shall be

strictly complied with, for the maintenance of safe working condition in the mine. Some of the

anticipated dangers and their preventive measures are as under:

a) Inundation from surface water: The Chutua nala makes the northern boundary of the

kedla underground mine. It may be always possibility of inundation from surface inrush of water into

the mine from this nala. The precaution proposed to deal with danger is that no working either

development or depillaring of pillars have been proposed within HFL of Chutua nala & its statutory

barrier. The barrier against HFL is proposed considering the statute mentioned in CMR 1957 & angle

of draw as 30 degree. No working is proposed below this barrier and below HFL. The existing

workings of seam-VIII show the developed pillars below HFL. No depillaring is proposed in this

developed area. There is a small patch after crossing HFL of Chutua nala , which is outside the HFL

of other bank of nala , where panels have been proposed in this scheme. But it is proposed that prior

permission is to be obtained for working in this patch. If DGMS permits , then only working should be

made in that patch.

b) Inundation from Underground water: The seam-VIII of kedla underground is mostly depillared

and waterlogged. The underlying seams (Seam-VI & VA) are lying at a parting of less than 60m,

which attracts Regulation 127 of CMR 1957. The cumulative thickness of extraction of seams (seam-

VA & VI) is around 7.5m. Hence, the crack developed on depillaring will generate wider cracks in the

parting between the seams and will provide the path for inrush of underground water in to the

workings of seam-VI & VA. Hence, it is proposed that while development & depillaring in underlying

seams, advance borehole should be made in the panels for ensuring the water condition in the



overlying seam. If any abnormal water seepages are observed, adequate precautions should be

taken to avoid the danger and completely withdraw the persons working below ground.

c) Dangers due to working in contiguous condition : Seam-VI & VA are contiguous to

each other. The parting between seam VI & VA is around 3.0m or less. Some where roof coal of

seam-VA may be required to leave to maintain a parting of minimum 3.0m between two sections.

Since the seams are contiguous, hence depillaring of both the seams should be done

simultaneously. While development in seam-VI, the pillars and galleries of seam VI should be

vertically coincident with pillars and galleries of seam-VA. The verticality of pillars and galleries

should be regularly ensured by putting hole in the parting of gallery of both seams.

d) Precautions against fire & spontaneous combustion : The proposed method of

mining is Bord & Pillar with solid blasting. The recovery percentage from a panel in Bord & Pillar

method of mining is around 70%. Around 30% of coal is bound to left in the goaf either in the form of

roof coal, rib pillar, panel barrier etc. On depillaring it may catch fire in the goaf due to spontaneous

heating of coal in the goaf. This goaf fire may propogate in to active working of seams if it is not

properly sealed off. Hence, it is proposed that the depillared panels should be effectively sealed with

explosion proof stopping. In addition to that the following additional precautions should be adopted to

prevent from spontaneous heating & fire are as under

- Approved type hydraulic fluid should be used in SDL

- As minimum as possible coal should be left in goaf.

- Other precautions as per CMR 1957 should be strictly complied with.

e) Precautions against dust: The source at which dust is generated should be identified and

precautions should be taken accordingly. In addition to that following additional precaution should be

adopted

- Proper ventilation of the face.

- Proper water spraying at the face & transfer point of the belt conveyors

- Provide dust mask to individual workers

- Steps for not making dust airborne etc

f) General Precaution : All underground workers shall be provided with self-rescuers and all such

resources, which are required for the safety of the workers, employed below ground or in surface and



shall be examined and maintained in proper condition. The various provisions of CMR, 1957 related

with the safety of the mines and persons employed there in should be strictly complied with.

g) Precautions for strata control:

1. While development or depillaring of the panel, the supporting should be done as per the

approved SSR.In case of roof bolting, it must be supplemented with the conventional support as and

when required.The scientific body should conduct the scientific study for the strata of kedla

Underground to determine the geo-physical characteristics of the strata and accordingly support

system should be prepared and implemented after approval from DGMS.

2. Adequate no. of convergence recorder, load cells etc. should be installed while depillaring

in any panel to protect from danger of air blast. Record of local fall and main fall should be properly

maintained and analyzed in the safety committee meeting, so that the general awareness regarding

local fall and main fall can be created among the workers and officials.

3. A strata-monitoring cell should be established at the project level for monitoring the strata

behavior regularly and precautions should be taken accordingly. The provision for Strata Monitoring

Cell has been made in this report.

All other steps as needed by the situation in accordance with the provisions of regulations and

circulars should be taken to avoid any mishaps due to roof fall.

In addition to above, all other provisions of CMR, 1957 which is attracted by strata problems together

with various related circulars should be effectively complied for safe working of the mine.

h) Precaution for signaling & Lighting : Sufficient lighting as per standards

should be provided at all the required places i.e. at all coal transfer points, loading points, working

faces, along trunk and gate belts, of SDL districts. addition to above, the provisions of CMR, 1957

together with related circulars should be complied.

18.3 COAL CONSERVATION: In order to extract maximum coal from the seams, the

depillaring of developed seams have not been proposed in this report. It is being proposed that the

developed pillars will be extracted by opencast which will provide maximum recovery of coal.



CHAPTER-XIX

ENVIRONMENT MANAGEMENT

Kedla underground is an existing underground mine. There is no approved EMP of this underground

project. As per guide lines of MoEF prior environmental clearance is to be obtained from MoEF but

till today EMP is not approved. For the approval of EMP, a pre feasibility report is required.

Accordingly, this pre feasibility report is prepared. In order to get EMP approval, a detailed

Environmental Impact Assessment & Environmental Management Plan will be prepared in which all

environmental aspects will be dealt properly. The total capital under EMP head has been estimated

and shown in appendix A.8.4 of this report. Further, provisions have been made for EMP related

activities from revenue account @ Rs.6.00/te. as “Environmental Protection cost”.



CHAPTER-XX

MINE CLOSURE PLANNING

Mining is a hazardous operation. After completion of mining operation, the project should have

adequate mine closure plan considering technical, environmental, social and financial aspects.

As per CMR 1957, the notice of abandonment on completion of mining activities should be given to

the Chief Inspector of Mines and Regional Inspector of Mines explaining the reasons of

abandonment and number of persons likely to be affected thereby, within 40 days of abandonment of

mining operation. Hence, this legislative requirement should be made by the owner of the company

within the prescribed period.

In order to perform the activities related to mine closure, adequate funds shall be required. Hence, a

corpus fund is proposed to be created by deducting @ Rs 1.30Lakh / Ha of land required UG mining

area for the project from revenue account and will be released at the time of undertaking mine

closure activity. The estimated mine closure cost for the proposed kedla underground is 433.86 lakhs

for 333.5 Ha of land (as per the norms with WPI of Dec, 2012). This amount has been distributed

over the projected life of 18 years with 5% early escalation.

However, the approved mine closure cost for thirty years of life is 742.36 lakhs. This is approved in

the 394th meeting of Board of Directors on 23.03.2013.



CHAPTER-XXI

PROJECT IMPLEMENTATION SCHEDULE & LAND DETAILS

21. LAND

The leasehold area of kedla underground is around 333.50 Ha. The land details within this leasehold

are as under:

S.N Type of Land Amount of Land(Ha)

1 Leasehold Area 333.50

a Forest Land 58.78

b Non Forest Land 274.72

21.1 ACQUISITION STATUS OF LAND

S.N Details of Land Acquisition Status of Land (Ha)

Forest Land

1 Total Forest Land 58.78

a Stage-I Clearance 29.19

b Applied for Stage-I

clearance

29.59

Non-Forest Land

Non-Forest land in

possession

274.72

As per the communication made by the project authority vide letter no PO/KUGP/13/730 dated

27.06.2013 and discussion with the project official that within the mine boundary (I.e. leasehold

boundary), forest land is 58.78 Ha and non forest land is 274.72 Ha. Out of the 58.78 ha , 29.19 Ha

of land has having stage-I clearance and remaining 29.59 Ha is applied for stage-I clearance. As

communicated by the mine official that the non-forest land falling within the leasehold area is in

possession. Therefore, capital provision for 58.78 Ha of forest land have been made in this report.

No capital provision has been made for non-forest land.



21.2 PROJECT IMPLEMENTATION SCHEDULE :

Since, the proposed underground is an existing running mine of CCL. The zero date for the project

will be the approval of the report. The existing production will continue with the existing four numbers

of SDLs and existing mine infrastructures.



CHAPTER-XXII

FINANCIAL EVALUATION

22.0 FINANCIAL EVALUATION

The capital requirement both Initial as well as beyond target year, has been proposed from the own

resources of the Company. The estimated capital requirement is given below:

Sl. Particulars

Rs.Crores

1 Initial Capital (Up to target year) 53.91

2 Additional Capital (up to target year) 39.24

3 Existing Expenditure up to 31.3.13 considered

in this PR (refer Appendix A’)

14.67

4 Capital beyond target year. 5.13

5 Specific Investment Rs./t 2179.95

22.1 GRADE OF COAL SELLING PRICE & PROFITABILITY

The present declared grade of Kedla UG is Washery Grade III and Washery Grade IV Coal. The

same has been considered for the purpose of present economic evaluation. The weighted average

selling price per tonne (Non-Power sector coal) has been worked out to 1562.07 including sizing

upto 250 mm 39/tonne. The overall estimated average cost of production of Rs.2840.18/t and Rs.

3308.39/t at 100% and at 85% operation levels respectively, the project is likely to incur loss of

1278.11/t and Rs. 1746.32/t, respectively.

22.2BREAK-EVEN PRODUCTION

It is estimated that the project would break-even at 192.24% of production capacity.

22.3 INTERNAL RATE OF RETURN

The overall financial Internal Rate of Return (FIRR) of the Project works out to Negative (-Ve) at

both 100% and at 85% level of production. The year-wise production and present declared grade

Washery Grade III & Washery Grade IV the weighted average selling price of Rs. 1562.07/t has

been considered for IRR calculation.

http://upload.wikimedia.org/wikipedia/commons/e/ee/Indian_Rupee_symbol.svg





Note:

The PR has also been worked out considering GCV based coal 5800-6100 and 6100-6400. The

weighted average selling price (non-power sector coal) has been arrived at 3020.09 including

sizing up to 250 mm 39 per tonne. The project will breakeven at 94.16%. The relevant results for

this option at 100 % and 85% capacity have been shown below;

Cost per Tonne

At 100%

At 85%

2855.94

3322.79

Profit/Tonne

At 100%

At 85%

164.15

-302.70

Financial IRR

At 100%

At 85%

8.35%

-ve-



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