论文部分内容阅读
一、降低矿石损失贫化指标的经济效益胡家峪矿主要使用有底柱分段崩落法采矿,垂直扇形中深孔,小补偿空间挤压与逐次挤压爆破。电耙出矿,现实际年产量为55万～60万吨。矿山采矿生产,损失贫化指标的优劣,对矿山资源的回收以及经济效益的影响较大。从1976～1982年的生产实际情况(见表1)作一分析,每年可在以下几个方面获得经济效益。
I. Economic Benefits of Reducing Ore Dilution Index of Ore Loss Hujiayu Mine mainly uses subsidence caving method with bottom column mining, vertical fan-shaped middle-deep hole, small compensation space extrusion and successive extrusion blasting. Electric rake out of ore, the actual annual output of 550,000 to 600,000 tons. Mine mining production, loss of the merits of poor indicators, the recovery of mining resources and the greater impact on economic benefits. From 1976 to 1982, the actual production situation (see Table 1) for an analysis, each year in the following areas to obtain economic benefits.