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 Jingtieshan Mine as an example,the peper deals with several problems with applying non-dilution ore drawing mw thod. 以镜铁山矿为例研究了无贫化放矿方式在矿山应用的若干问题。
