TheControlManagementofAcidMineDrainage課件.pptVIP

The Control Management ofAcid Mine Drainage By Andy Robertson and Shannon Shaw Disclaimer These slides have been selected from a set used as the basis of a series of lectures on Acid Mine Drainage presented in 2006 at the University of British Columbia, Vancouver, BC. No attempt is made here to provide linking text or other verbal explanations. If you know about Acid Mine Drainage, these slides may be of interest or fill in a gap or two—going back to basics never hurts the expert. If you know nothing of Acid Mine Drainage, these slide may be incomprehensible, but on the other hand they may be an easy way to ease into a tough topic—good luck. ARD Prevention Control Measures Primary, secondary and tertiary controls Oxygen control Groundwater control Surface water control Covers Collection and treatment Control Technologies Prevention Control designed and implemented before the event of ARD No acid product storage Abatement and Mitigation Control implemented after the fact Acid product storage Approaches to Control Primary - control of acid generation Secondary - control of migration of contaminants Tertiary - collection and treatment ARD Control Technology Selection Segregation Blending Segregation: Feasibility of sulphide removal Sometimes applicable to tailings which can be floated Not applicable to waste rock Feasibility of separation by rock unit classification Depends on variability and selective mining capability Requires: Long range planning for designing of waste dumps and coarse scheduling Short range planning to schedule haulage to correct destinations by time period Accurate, reliable in-field sampling, testing and prediction (blast hole sampling and modeling) Very strict effective operations control Segregation Blending Blending methods: Layering Coarse blending by scheduling Fine blending by truck loads and dozer pushing Alkali addition Blending Blending Blending Blending Oxygen Control Process by which oxygen enters reactive waste deposits: Diffus