Mining methods2

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Mining methods2

  1. 1. Underground Mining Methods
  2. 2. Ore body elements dip Width,thickness hanging wall footwall overburden horizontal exetend Vertical extent
  3. 3. 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
  4. 4. Room-and-pillar mining Drilling and blasting Loading and haulage Scaling and Bolting
  5. 5. Room-and-pillar mining Drilling Rig LHD Truck Bolting Rig Scaling Machine Ventilation Drift Pillars Rib Pillar Transport Drift Stope Drift Room Room Room
  6. 6. 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
  7. 7. Room-and-pillar mining Mechanized room-and-pillar step mining of an inclined ore body
  8. 8. Room-and-pillar m echanized multiple-passe mining Mechanized multiple-passe mining
  9. 9. Room-and-pillar mining with caving of pillars Primary extraction Primary extraction Primary extraction Secondary extraction Caving of residual pillars Recoverable pillar Residual pillars
  10. 10. Room-and-pillar mining with caving
  11. 11. Room-and-pillar mining with caving
  12. 12. 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
  13. 13. Post-pillar mining of thick layers or massive deposits
  14. 14. Longwall mining with caving
  15. 15. Longwall mining with caving
  16. 16. Longwall multiple slicing with caving 2 slice 3 slice 5 slice 4 slice caved 1 slice
  17. 17. Longwall mining with backfilling
  18. 18. Longwall mining with backfilling Cooper mine Mansfelde (German) 1, 3 - transport drifts ; 2 - stope drifts ; 4 - crosscuts
  19. 19. Longwall mining with back timbering Support by timbers Support by wood packs
  20. 20. Longwall mining with back timbering
  21. 21. Longwall mining with back timbering
  22. 22. Longwall mining with caving with backfilling with back timbering
  23. 23. Post-pillar mining of thick layers or massive deposits

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