Chapter 6

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6.0 Chapter 6: Prevention And Mitigation (Ward Wilson)

  • 6.1 Introduction
  • 6.2 Objectives of Prevention and Mitigation
  • 6.3 The ARD Prevention and Mitigation Approach
  • 6.4 Relevance of ARD Source
  • 6.5 Consideration of ARD Factors
  • 6.6 ARD and Metal Leaching and Sulphate Production
  • 6.7 Climatic and Other Factors
  • 6.8 Phased Approach
  • 6.9 Overview of Methods
    • 6.9.1 Remining
    • 6.9.2 Special Handling Methods
      • 6.9.2.1 Incorporation in Mine Plan
      • 6.9.2.2 Segregation
      • 6.9.2.3 Desulphidization
      • 6.9.2.4 Compaction and Physical Tailings Conditioning
      • 6.9.2.5 Encapsulation and Layering
      • 6.9.2.6 Blending
      • 6.9.2.7 Co-disposal
      • 6.9.2.8 Permafrost and Freezing
    • 6.9.3 Additions and Amendment Methods
      • 6.9.3.1 Passivation
      • 6.9.3.2 Alkaline materials
      • 6.9.3.3 Organics
      • 6.9.3.4 Bactericides
    • 6.9.4 Water Management Methods
      • 6.9.4.1 Hydrodynamic controls
      • 6.9.4.2 Dewatering
      • 6.9.4.3 Diversion
      • 6.9.4.4 Filling
      • 6.9.4.5 Seals
    • 6.9.5 Dry Cover Methods
      • 6.9.5.1 Organic
      • 6.9.5.2 Soil
      • 6.9.5.3 Limestone and Alkaline
      • 6.9.5.4 Synthetic
      • 6.9.5.5 Gas
      • 6.9.5.6 Vegetation
    • 6.9.6 Water Cover Methods
      • 6.9.6.1 Subaqueous
      • 6.9.6.2 Partial water cover
      • 6.9.6.3 Wetland covers
    • 6.9.7 Impact Mitigation
      • 6.9.7.1 Attenuation
      • 6.9.7.2 Dispersion
      • 6.9.7.3 Stream Flow Regulation
      • 6.9.7.4 Water recycle and reuse
  • 6.10 Secondary Impacts
  • 6.11 Evaluation of Alternatives
  • 6.12 Design and Construction Considerations
  • 6.13 Maintenance and Monitoring Considerations
  • 6.14 Closure and Long-term Considerations
  • 6.15 ARD Prevention and Mitigation FAQ's
  • 6.16 References