现代矿业
現代礦業
현대광업
Express Information of Mining Industry
2011年
6期
33-36
,共4页
矿柱回收%采空区%空场法%崩落法%微差爆破
礦柱迴收%採空區%空場法%崩落法%微差爆破
광주회수%채공구%공장법%붕락법%미차폭파
Pillar recycle%Vacant place%Open stope method%Sublevel caving method%Millisecond blasting
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。
密雲鐵礦經多年開採,即將由露天轉入地下開採。在露採轉入地採的過程中,掛幫礦體採用瞭分段鑿巖階段空場法開採,迴採結束後形成瞭體積約52 500 m3的空區,併留下瞭大量礦柱,總礦量達40多萬t,隨著時間延長,地壓不斷增加,礦柱已齣現跼部冒落破壞,隨時會有遲擊地壓的產生,而以下礦體又改用無底柱分段崩落法,在崩落法正是迴採前,需對採空區處理併迴收礦柱遺存礦量。針對密雲鐵礦掛幫礦開採所留間柱與頂柱迴收問題,從迴收方法、爆破方案和迴收順序進行瞭分析探討,併對全部遺留礦柱進行成功迴收。
밀운철광경다년개채,즉장유로천전입지하개채。재로채전입지채적과정중,괘방광체채용료분단착암계단공장법개채,회채결속후형성료체적약52 500 m3적공구,병류하료대량광주,총광량체40다만t,수착시간연장,지압불단증가,광주이출현국부모락파배,수시회유충격지압적산생,이이하광체우개용무저주분단붕락법,재붕락법정시회채전,수대채공구처리병회수광주유존광량。침대밀운철광괘방광개채소류간주여정주회수문제,종회수방법、폭파방안화회수순서진행료분석탐토,병대전부유류광주진행성공회수。
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.
