Date post: | 01-Sep-2014 |
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Technology |
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Underground MiningUnderground MiningMethodsMethods
dip
Width,thickness
hang
ing w
all
foot
wall
overburden horizontal exetend
Ver
tical
ex
tent
Ore body elements
Ore body geometry
Seam or flat dipping vein
Steeply dipping vein
Massive deposit
Dip < 10 °
Thickness is much less than horizontal extend
Medium dipping vein
Dip > 45 - 50°
Thickness is much less than horizontal and verticalextend
10° < Dip < 45°
Thickness is much less than horizontal and verticalextend
Horizontals and verticalextends are equal
Room-and-pillar mining
Drilling and blasting
Loading and haulage
Scaling and Bolting
Room-and-pillar mining
Drilling Rig LHDTruck
Bolting Rig
Scaling Machine
Ventilation Drift
Pillars
Rib
Pill
ar
Transport Drift
Stop
e D
rift
Roo
m
Roo
m
Roo
m
Room-and-pillar mining
Mechanized room-and-pillar
mining of a thick ore body
Non mechanized room-and-pillar mining of an inclined
ore body
Room-and-pillar mining
Mechanized room-and-pillar step mining of an inclined ore body
Room-and-pillar mechanized multiple-passe mining
Mechanized multiple-passe mining
Room-and-pillar mining with caving of pillars
Primary extraction
Primary extraction
Primary extraction Secondaryextraction
Caving of residual pillars
Recoverable pillar
Residualpillars
Room-and-pillar mining with caving
Room-and-pillar mining with caving
Room-and-pillar mining with backfilling
Backfilling with cemented fillPrimary extraction
Secondary extraction
Filling of secondary opening with cemented fill
Tertiary extraction
Filling of tertiary openings with non cemented fill
Post-pillar mining of thick layers or massive deposits
Longwall mining with caving
Longwall mining with caving
Longwall multiple slicing with caving
2 slice
3 slice
5 slice
4 slice caved
1 slice
Longwall mining with backfilling
Longwall mining with backfilling
CC
C-C
Cooper mine Mansfelde (German)
1, 3 - transport drifts ; 2 - stope drifts ; 4 - crosscuts
Longwall mining with back timbering
Support by timbers Support by wood packs
Longwall mining with back timbering
Longwall mining with back timbering
Longwall mining
with caving
with backfilling
with back timbering
Post-pillar mining of thick layers or massive deposits
Méthode d'éxploitation
Puissance éxploitée
Conditions géomécaniques
Taux de défruitement
chambres et piliers abandonnés < 50 m Rp > 2si 50-80%
chambres et piliers foudroyés < 8 m Rp > 2si 70-90%
chambres et piliers remblayés Rp>=2i < 5 m Rp > 2si jusqu’à 95%
tailles foudroyées < 4 m Rp < 2si 70-90% ilôts < 4 m si<Rp < 2si 50-65%