Mine closure is a complex multidisciplinary effort typically requiring several years of planning and execution. After numerous years of mining, the final stages are closure and post-closure monitoring. The solutions are often unique and complex owing to the different nature of the geology, mining methods employed, and a high degree of uncertainty in the conditions of the various mine wastes. This session will describe the common basis of site risks and Parsons’ approach to managing these risks to provide the best value to owners.
Michael Nahir, P.Eng., will describe some of the common key risks and challenges in the consideration of mine closure. Physical and chemical processes will be described in terms of how they affect various mine site components. Various closure methods will be described, along with design life and other considerations. The current state of practice in mine closure will be presented. The Faro and Giant mines are the two largest and most complicated mine closure projects in Canada, each with a different set of challenges. These two case studies will be presented by Jamie Carss, P.Eng., and Michael Nahir, P.Eng. Water management is critical to meeting closure objectives. Les Cordone, PE, will showcase the Faro water treatment program, including an in-situ treatability assessment to determine the most cost-effective and compliant treatment process.
To be cost-effective, it is critical to managing all the numerous closure aspects to drive to solutions that meet the owner’s requirements. Michael will present Parsons’ approach to managing site risks and closure plan implementation to provide the best value to owners.