Optimizing Long-Term Production Plans In Underground And Open Pit Copper Mines
The authors present a methodology for long?]term mine planning based on a general capacitated multicommodity network flow problem formulated as a comprehensive math programming model. The planning methodology considers underground and open pit ore deposits sharing multiple downstream processing plants over a long horizon. The purpose of the model is to optimize several mines in an integrated fashion, though the real size instances are hard to solve due to the combinatorial nature of the problem. They tackle this by solving the relaxed problem of a tight linear formulation and they round the resulting near?]integer solution with a customized procedure.