多金属条件下的露天矿边际品位指标优化应用研究

he cut-off grade is one of the important parameters of mining production. It is economical and effective to some extend. The reasonable cut-off grade can provide scientific basis for mining plan and provide investment decision analysis for mining managers. In view of multiple metal open-pit, the paper has proposed that multiple metal cut-off grade optimization model is set using the objective function to maximize net present value(NPV). The method of equivalent coefficient calculation is proposed. Then the method of plan review techniques is used to determine the price of molybdenum and tungsten products in a large open-pit mine. Based on 3D metal deposit model, the distribution of grade-tons is analyzed. The multiple metal cut-off grade optimization model is used to provide reasonable analysis for investment decision and production management. A reasonable cut-off grade is proposed to guarantee investment returns, extend the mine service life, and increase the mineral resources recycling.