Mining methods2

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Text of Mining methods2

  • Underground Mining Methods
  • Ore body elements dip Width,thickness hanging wall footwall overburden horizontal exetend Vertical extent
  • 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 vertical extend 10 < Dip < 45 Thickness is much less than horizontal and vertical extend Horizontals and vertical extends are equal
  • Room-and-pillar mining Drilling and blasting Loading and haulage Scaling and Bolting
  • Room-and-pillar mining Drilling Rig LHD Truck Bolting Rig Scaling Machine Ventilation Drift Pillars Rib Pillar Transport Drift Stope Drift Room Room Room
  • 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 m echanized multiple-passe mining Mechanized multiple-passe mining
  • Room-and-pillar mining with caving of pillars Primary extraction Primary extraction Primary extraction Secondary extraction Caving of residual pillars Recoverable pillar Residual pillars
  • Room-and-pillar mining with caving
  • Room-and-pillar mining with caving
  • Room-and-pillar mining with backfilling Backfilling with cemented fill Primary 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 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