复杂矿体条件矿石损失贫化原因及对策

Reasons and countermeasures of ore loss and depletion in complex orebody conditions

针对复杂矿体条件无底柱分段崩落法矿山存在的矿石损失贫化率高、矿山地质储量消耗过快、采掘比例失调等突出问题,详细分析了复杂矿体条件下无底柱分段崩落法矿石损失贫化的主要原因.并针对矿山存在的问题,提出了降低矿石损失贫化技术措施及下盘切岩开采+上分段下盘围岩辅助回收小进路回采下盘残留矿石新工艺,对目前国内相关矿山具有借鉴意义.

Focusing on the problems that the ore loss and depletion rate are high, the geological reserves consumption are too fast and the excavating proportion is imbalance in complex orebody conditions with pillarless sublevel caving method mine, this paper analyzed the main reasons of the ore loss and depletion in the complex orebody conditions with pillarless sublevel caving method mine. According to the problems existing in mine, this paper put forward some measures to reduce the ore lose and dilution and a new method that uses the footwall cutting stopping technology combined with the small assistant mining erterance stoping technology in the surrounding rock of head piece-wise's footwall for mining the footwall residual ores, which provided a reference case for the relevant mines.