缓倾斜极薄矿体全面法开采残留点柱回采方案及稳定性分析研究  

Study on stope scheme and stability analysis of point pillar of gently inclined and extremely thin orebody

作　　者：侯国权 刘光生 樊川 郭利杰 黄丹 原野 HOU Guoquan;LIU Guangsheng;FAN Chuan;GUO Lijie;HUANG Dan;YUAN Ye(BGRIMM Technology Group,Beijing 102628,China;;National Center for International Joint Research on Green Metal Mining,Beijing 102628,China)

机构地区：[1]北京矿冶科技集团有限公司,北京102628 [2]国家金属矿绿色开采国际联合研究中心,北京102628

出　　处：《中国矿业》2018年第10期117-121,共5页China Mining Magazine

基　　金：国家自然科学基金项目资助(编号:51774040)

摘　　要：某石英脉型钨矿床,矿体倾角平均20°,矿脉厚度0.3~0.8m,采用全面法开采。经过20多年的开采遗留下大量点柱和空区,而且相邻的采空区、以及相邻中段的采空区基本已相互贯通形成空区联合体。随着暴露时间的延长,采场应力集中,采空区安全隐患大,同时造成大量矿柱资源浪费。为了确保矿山生产安全和可持续发展,同时对遗留的矿柱进行回收,通过研究采场顶板允许暴露面积、结合开采技术条件、充填工艺研究等,确定的矿柱回收工艺和采场充填工艺,并针对试验采场的回收方案进行采场矿柱回收稳定性数值分析,综合验证了点柱充填回采的方案是安全可行的,从而为矿山空区治理与点柱安全回收提供指导。In a quartz vein type tungsten deposit,the orebody dip average is 20°,the vein thickness is 0.3-0.8 m,it is using the shrinkage method.After more than 20 years mining,left a large number of point pillars and mine goafs,and adjacent goafs,as well as the adjacent middle of the mined-out area has basically been formed into an empty zone complex.With the extension of exposure time,the stress concentration in stope,the hidden danger of goafs,and the waste of pillars resources.In order to ensure the safety and sustainable development of stoping,at the same time,the residual pillars are recovered,the pillar recovery process and stope filling technology are determined by studying the allowable exposed area of stope roof,combined with mining technology condition and filling technology,and the numerical analysis of stope pillar recovery stability is carried out according to the recovery scheme of test stope.It is proved that the scheme of the point pillar filling stoping is safe and feasible,and to provide guidance for the management of mine goafs and the safety recovery of point pillars.

关 键 词：采空区 点柱 回采 胶结充填 数值模拟 

分 类 号：TD862.5[矿业工程—金属矿开采]