| In the development and utilization of mineral resources, the determination of cut-off grade ore directly affected the shape of the ore bodies, ore deposit reserves and other factors, which affect mine production scale and life cycle. Reasonable cut-off grade, need according to the ore deposit-grade distribution and mining ore prices, cost factors such as the calculation, the calculation results will change by ore prices fluctuate or mining cost. Even for a single metal deposit, also there are two problems worthy of studying. One is to determine cut-off grade method; the second is the marginal grade to determine dynamic problems. For the former, we can be used in practice experience assessment method, profit and loss balance calculation method, such as marginal grade is determined. In the latter case, when there is no corresponding technology.To study the solution of these problems, this paper, by using3d digital technology has solved the polymetallic ore deposit model of associated copper deposit equivalent copper deposit modeling problems. Substitute equivalent marginal grade copper polymetallic comprehensive marginal grade simplifies the marginal grade optimization; Through sensitivity analysis, will lead to the grade of ore-change more simplified as two factors, verify the grade of ore-a relatively static range; Designed the orebody overall mining and stripping plan stage of two-stage marginal grade optimization method, solve the grade of orebody distribution caused by the marginal grade optimization algorithm limitations; Developed the computer program is compiled to realize the3d deposit model data calls and marginal grade optimization index of the dynamic management.Based on the copper mines in dexing copper mine actual data as sample,3dmine mining software as the platform, set up the digital mineral deposit model and gun powder Kong Yan data ore body model, through the maximum net present value method and the maximum annual profit method to optimize the marginal grade two stage computer program calculation, to make the optimized marginal grade is more reasonable. From optimization index analysis can see, more comprehensive recycling metal open deposit can increase the economic benefits of mines, extend the mine service life; For marginal grade change with the price of the metal of the dynamic management, can make the profit of mining enterprises and the total net present value increase, not only make got comprehensive recycling utilization of resources, also can bring considerable economic benefit and social benefit. |
PDF Full Text Request