空场法在稳固性较差矿体中的应用

Application of open-stope method in relatively unstable ore body

柏坊铜矿刘家湾矿段53#矿体为该矿深部小矿体。由于该矿体赋存情况特殊,矿体稳固性较差,按常规不适宜用空场法回采。经过技术经济分析,利用矿体顶板围岩稳固性较好且呈特殊的穹窿状构造的有利条件,设计提出了两种空场法方案,即房柱法和无底柱矿房留矿法,取得了较好的技术经济效果。实践证明,在一定的地质条件下稳固性较差的矿体仍可用空场法回采。

No.53 ore body of Bofang Copper Mine is a deep small body. Because the ore body was endowed with bad stability, openstope method can not be used for mining usually. Through technical and economical analyzing, and considering relatively unstable upper rock with domesharp, we have designed two kinds of stope method, that are roomandpillar method and shrinkage method without sill pillar. The two kinds of stope method have been used well, and better technical and economical results have been got. The practice proved that stope method can be used in relatively unstable ore body under same condition.