the existing method is to determine the cutoff grade of ore draw by calculating the marginal balance of revenue-expenditure of one blast step but not whole block or ore body.
现行的方法是按每个崩矿步距(而不是整个矿块或矿体)计算收支平衡条件,从而确定放矿截止品位的。
based on the technical and economical index, an optimal decision for the cutoff grade of ore drawing is presented.
在获取矿石技术经济指标的基础上,对截止放矿品位进行了优选政策。
taking maximum net present value as an optimum target and considering factors in mining, milling and metallurgy, a dynamic optimum method for optimizing cutoff grade of underground orebody is given.
以凈现值最大为优化目标,同时考虑采、选、冶三阶段因素,给出了地下开采矿体边界品位动态优化的方法。
the model considers the mining order and the grade distribution in different deposit sections and has realized the time-space dynamic combination of the cutoff grade in underground mining.