The method for determining the optimum sub-cutoff grade is developed.
提出和建立了确定最优次边界品位的比较完整的理论方法。
The cutoff grade systems are discussed, and it proposes that China should change from dual cutoff grade system to a single one.
对矿石开采品位指标体系问题进行了探讨，认为我国必须从双指标体系转变到单指标体系。
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.
该模型考虑矿体的开采顺序和矿床不同区段的品位分布，实现了地下开采边界品位在时间和空间上的动态结合。
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.
以净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。
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.
以净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。
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