Case studies of simultaneous mining and

This paper develops the themes explained at the previous SAIMM Platinum conference by Whittle and Burks. Optimization techniques can significantly increase the value of mining businesses by enabling better long-term planning decisions. This study evaluates open pit and underground mine design, mine scheduling, cut-off grade and blending, stockpiling, and links these to metallurgical recovery processes. Additionally, transport or sale of intermediate products and market requirements are considered. Experience indicates that net present value (NPV) can be enhanced by 5-35 percent or more, often even before substantial project capital expenditure. The case studies presented encompass an operation comprising multiple open pits and PGM concentrators linked to offsite processing, an operation with an integrated portfolio of mines and processing plants prioritizing sources of ore, an underground operation in Zimbabwe calculating optimum mining width and evaluating expansion plans, and a mine with diverse sections developing a schedule to maintain capacity with high-value material throughout its lifespan. The concluding section provides strategic recommendations on how to implement the optimization findings effectively.