Hans Greve_Aker Wirth

8/12/2019 Hans Greve_Aker Wirth

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part of Aker

2009 Aker Solutions

Innovative Tunneling Methods forUnderground Mining

Hans Greve EVP Mining & Construction

Aker Wirth GmbH


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2009 Aker Solutions part of Aker

Workshop Expomin April 2010

Slide 2

Contents

Introduction

Overview of technologies

Mechanised excavation methods in block caving

Mobile Tunnel Miner

Discussion


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Slide 3

Introduction

Hard Rock Tunneling

Applications

Infrastructure

Mine development

Products

Tunnel boring machines

Roadheaders

Microtunneling machines

Mining

Applications

Mine development

Production technology

Products

Roadheaders

Continuous Miners

Shaft and raiseboringmachines

Foundation Drilling

Applications

Foundation drilling

Diamond drill ships

Products Pile top drill rigs

Universal drill rigs

Drill ship equipment

Aker Wirth was founded in 1895 and since 2009 part of Aker Solutions


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Slide 4

Overview of Excavation Technologies

Drill & Blast

Proven technology

Limited in advance rate (100-150m/month)

Low investment capital equipment

High operating costs

More overbreak and additionalsupport

Use of explosives

Safety


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Slide 5

Mechanised Excavation Methods

Continuous Miner

Room & Pillar Mining

Roadway Development

Coal, Salt Mines

Roadheaders

NATM Tunneling projects

Roadway Development

Coal, Salt, Copper Mines

Tunneling projects

Hard Rock TBM

Tunneling projects

Infrastructure for various

purposes e.g. water, traffic, HEP

Mobile Tunnel Miner

Undercutting technology

Infrastructure for hard rock

mining


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Slide 6

Application of equipment

Rock strength, UCS


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Slide 7

Typical Underground Mining Layout


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Slide 8


Shaftboring

Blind hole drillingRaiseboring


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Slide 9


Main Infrastructure

Access and infrastructure

tunnels area 20-30 m

Supported with bolting &

shotcrete (50-100 mm)

Mobile and short turning

radius


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Slide 10

Mobile Tunnel Miner 6 arm

Exclusive development of the MTM6 as Tunnel Boring System for

Rio Tinto project the Mine of the Future Capable to excavate up to 6 m in diameter, but different tunnel

shapes

Fast and cost effective tunneling methods (> 10 m/day)

Fully self-supporting in excavation, lining support and logistics

L1

L2

Excavation Tunnel supportMaterial handling and logistics


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Slide 11


Development & Haulage tunnels

(footprint) Development and haulage tunnels

area 15-20 m

Roof supported with bolting &

shotcrete (?)

Mobile, reversible and short turning

radius High advance rate


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Slide 12

MTM4 main characteristics

Cutting

arms

Gripping mechanism

Bolting & optional shotcreting

Roof support

Loading discs Dust collection pipe

Stepping mechanism

during cutting process

Crawler for tramming

Gripping mechanism

Reels for cable

water, air

Conveyor

for muck cars

Conveyor

throat

Control cabin

The design of the MTM is robust and uses a combination of proven technologies

The system provides a safe working place, with protective areas for operators and

a high quality of dust control.


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Slide 13

MTM4 Cutting profile with undercutting technology

Cutting area of theinner arm

Cutting area of theouter arms

The Aker Wirth MTM is capable to produce different tunnel cross-sections,

using one and the same machine, from rectangular, to horseshoe and

circular shape.


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Slide 14

MTM4 Manoeuvrability

Due to its own crawler drive, the system has a relatively highmaneuverability and flexibility to travel underground from one face to

another. 25 m turning radius, with articulated machine design

Independent forward and reverse movement on crawler tracks

Cable reels for power cables, water hoses


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Slide 15

Mining sequence footprint design

Support functions:

Deduster

Transformer

Secondary roof support

Muck transport

MTM

Ventilation

Flexibel connection

Power cable

WaterAir suction line

The MTM is capable of achieving advance rates of 12 m/day in

varying rock classifications.

There is no limit in rock strength for the application of the MTM

system. The advance rates and wear costs remain economically

acceptable in high strength rock (> 200 MPa UCS).


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Slide 16

Mine design and planning

Challenges for mine design and planning

How to use the advantages of:

Safer excavation method - roof & rib support

Faster excavation method - development stages

25 m excavation radius - footprint layout

Utilize new technolgies such as the Mobile Tunnel

Miner to achieve a faster and more cost effective minedevelopment


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Slide 17

Thank you for your attention

Creighton Norite 260 MPa


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Slide 18

Copyright

Copyright of all published material including photographs, drawings and images in this documentremains vested in Aker Solutions and third party contributors as appropriate. Accordingly, neither thewhole nor any part of this document shall be reproduced in any form nor used in any manner withoutexpress prior permission and applicable acknowledgements. No trademark, copyright or other noticeshall be altered or removed from any reproduction.


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Slide 19

Disclaimer

This Presentation includes and is based, inter alia, on forward-looking information and statements thatare subject to risks and uncertainties that could cause actual results to differ. These statements andthis Presentation are based on current expectations, estimates and projections about global economicconditions, the economic conditions of the regions and industries that are major markets for AkerSolutions ASA and Aker Solutions ASAs (including subsidiaries and affiliates) lines of business.These expectations, estimates and projections are generally identifiable by statements containingwords such as expects, believes, estimates or similar expressions. Important factors that couldcause actual results to differ materially from those expectations include, among others, economic and

market conditions in the geographic areas and industries that are or will be major markets for AkerSolutions businesses, oil prices, market acceptance of new products and services, changes ingovernmental regulations, interest rates, fluctuations in currency exchange rates and such otherfactors as may be discussed from time to time in the Presentation. Although Aker Solutions ASAbelieves that its expectations and the Presentation are based upon reasonable assumptions, it cangive no assurance that those expectations will be achieved or that the actual results will be as set outin the Presentation. Aker Solutions ASA is making no representation or warranty, expressed orimplied, as to the accuracy, reliability or completeness of the Presentation, and neither Aker Solutions

ASA nor any of its directors, officers or employees will have any liability to you or any other personsresulting from your use.

Aker Solutions consists of many legally independent entities, constituting their own separate identities.Aker Solutions is used as the common brand or trade mark for most of these entities. In thispresentation we may sometimes use Aker Solutions, we or us when we refer to Aker Solutionscompanies in general or where no useful purpose is served by identifying any particular Aker Solutionscompany.

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