| ISSUES |
REHABILITATION OBJECTIVES |
MEASURES |
| Physical Stability Issues: |
| Openings to Surface |
Prevent inadvertent access |
- minimize number of openings
- permanently plug or seal openings to surface
- backfill shafts, raisses and slopes open to surface
- vent water and gas pressures
|
| Surface Disruption |
Prevent inadvertent access |
- use mining method resuting in stable surface
|
| Surface and underground stabilization |
- stabilize surface
- ditch/berm; fence and sign post unsafe areas until natural stabilization occurs
- backfill surface openings, if practical
|
| Surface Disturbance Subsidence |
Stabilize surface |
- use mining method resulting in stable surface
- re-contouring or diversion to re-establish drainage patterns
|
| Barrier Pillars Stability |
Prevent collapse and flooding of and/or stress transfer to adjacent mine |
- permanently support boundary pillar
- ensure access to neighbouring mine and continued pumping
|
| Chemical Stability Issues: |
Acid Drainage and/or Leaching of Minerals or Contaminants
Seepage of Mill Reagents from Backfill |
Meet surface water quality objectives by: controlling reactions and/or controlling migration; collect and treat |
- flood workings to control reaction
- permanently plug workings and drillholes to control migration
- collect and treat
- drain oil containing equipment, motors, transformers, etc.
|
| Land Use Issues: |
| Productivity and Aesthetics |
Return surface to original or approved use |
- backfill disrupted areas and openings where practicable
- contour surface
- revegetate
|
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Environmental Technology for Mining
