下向扇形孔回采顶柱的实践  

Practice of Crown Pillar Mining with Down Fan-pattern Holes

作　　者：肖富国[1] 蹇兴仁[1] 

机构地区：[1]水口山矿务局铅锌矿,湖南常宁市421504

出　　处：《矿业研究与开发》1999年第6期12-15,共4页Mining Research and Development

摘　　要：水口山矿务局铅锌矿２ ＃ 矿体中Ｗ８０２ 顶柱的上、下部均为大空区，对该顶柱用下向扇形孔回采，取得了较好的效果。文中较详细地介绍了该顶柱回采的爆破设计。There were large mined-out areas above and under W802 crown pillar in 2 # orebody of Lead-Zinc Mine of Shuikoushan Mining Bureau.This crown pillar was extracted with down fan-pattern holes,achieving good results.The paper introduced the blasting design for recovery of the crown pillar in detail.

关 键 词：顶柱 下向扇形孔 爆破设计 铅锌矿 采矿 

分 类 号：TD862.2[矿业工程—金属矿开采] TD862.3[矿业工程—矿山开采]