空场采矿法间柱与顶柱回收方法应用  

Application of the Recycle of Pillars after Sublevel Room Mining Method

作　　者：陈彬 郭广贤 严成涛 

机构地区：[1]首云矿业股份有限公司 [2]金诚信矿业管理有限公司

出　　处：《现代矿业》2011年第6期33-36,共4页Modern Mining

摘　　要：密云铁矿经多年开采,即将由露天转入地下开采。在露采转入地采的过程中,挂帮矿体采用了分段凿岩阶段空场法开采,回采结束后形成了体积约52 500 m3的空区,并留下了大量矿柱,总矿量达40多万t,随着时间延长,地压不断增加,矿柱已出现局部冒落破坏,随时会有冲击地压的产生,而以下矿体又改用无底柱分段崩落法,在崩落法正是回采前,需对采空区处理并回收矿柱遗存矿量。针对密云铁矿挂帮矿开采所留间柱与顶柱回收问题,从回收方法、爆破方案和回收顺序进行了分析探讨,并对全部遗留矿柱进行成功回收。After years of mining,the mining method in Miyun iron mine is changing from open-pit mining to underground mining.And in this process,sublevel rock drilling and stage room stoping method is used to take the ore in the pit outline.After its completeness,a vacant place about 52 500 m3 will be to take shape.Besides,a lot of pillars will be leaved behind and the ore in those pillars will be more than 400 000 tons.As time past,the earth pressure is increasing all the time and some pillars have collapsed.So impact earth pressure will happen at any time.Pillarless sublevel caving method will be used under the pit outline,so it is needed to deal with the vacant place and recycle the pillars before its beginning.Based on the problem of recycling of Pillars after sublevel rock drilling and stage room stoping in Miyun iron ore,it involves the recycling method,the blasting method and the recycling sequence and all the pillars have been recycled by this method successfully.

关 键 词：矿柱回收 采空区 空场法 崩落法 微差爆破 

分 类 号：TD861.1[矿业工程—金属矿开采]