锡矿山锑矿缓倾斜薄矿体开采中贫化率的控制

锡矿山锑矿主要薄矿体呈缓倾斜似层状，赋存于厚110m钙质页岩下的硅化灰岩中，过去长期采用杆柱房柱法开采，矿石贫化率超过20％，现在已改用杆柱砂浆充填法开采，并从设计、施工、出矿等多个环节进行严格控制管理，矿石贫化率已低于15％，大大提高了出矿品位，节约了开采费用，取得了较为显著的经济效益。

Control of Dilution Rate for Gently Inclined Thin Ore Mining in the Hikushang Antimony Deposits

The main thin ore-body was gently inclined stratoid in the Hikushang antimony deposits, and occurred in the silicified limestone directly beneath of 110 m thick calcareous shale, the long - standing it used the post room and pillar mining method, ore dilution rate of which was over 20%, and now most have switched to the post mortar backfill mining, and made strict control and management from the design, construction, mining and other aspects. The ore dilution rate is below 15% ,and mining cost savings achieve more significant economic benefits.