1·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。
2·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。
3·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。
4·According to this cutoff grade, the paper has calculated the ratio of ore and rock while cutoff drawing that provide science fo...
据此计算了截止放矿时的矿岩比，为小官庄矿放矿提供了科学依据。
5·According to this cutoff grade, the paper has calculated the ratio of ore and rock while cutoff drawing that provide science foundation for the drawing of Xiaoguanzhuang iron mine.
据此计算了截止放矿时的矿岩比，为小官庄矿放矿提供了科学依据。
6·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。
7·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。