浅埋厚大残留矿体安全回采方案研究  

Safe mining scheme of shallow buried large and residual ore body

作　　者：刘涛[1] 焦满岱[1] LIU Tao;JIAO Man-dai(Northwest Institute of Mining and Metallurgy,Baiyin 730900,Gansu,China)

机构地区：[1]西北矿冶研究院

出　　处：《矿冶》2019年第3期1-8,共8页Mining And Metallurgy

摘　　要：为了的对浅埋厚大囊状残留矿体进行安全回采,通过对矿体区域内的岩体进行调查和质量评价,得到了矿岩和围岩的RMR评分值,对矿岩和围岩进行了岩石力学试验,测得了主要的力学参数。根据残留矿体的空间赋存特征,通过方案技术、经济对比,确定采用垂向矿柱空场法为开采方案。对回采方案进行数值模拟分析,结果显示,矿房回采结束后,矿房顶部最大位移为2.36cm,对两种矿柱的回采顺序进行了模拟,并根据模拟结果进行了对比分析,最终确定了矿柱的回采顺序。矿柱回采后,空区顶板Z方向的最大位移达3.9cm,说明空区是稳定的,研究结论对回采存留矿体具有一定的指导意义,并从理论上分析了回采结束后空区的稳定性。In order to safely and effectively recover the large residual shallow ore body,the RMR score of ore rock and surrounding rock is investigated through the investigation and quality evaluation of the rock mass in the ore body area.Rock mechanics tests were carried out on the main rock mechanics parameters.According to the spatial characteristics of residual orebodies,through the program technology and economic comparison,it is determined that the vertical pillar method is adopted as the mining scheme.The simulation results show that the maximum displacement at the top of the mined bar is 2.36 cm after the end of mining,and the sequence of the recovery of the two pillars is simulated and compared with the simulation results to finalize after the pillars were recovered,the maximum displacement in Z direction of the roof of the empty area reached 3.9 cm,indicating that the empty zone was stable.The research conclusions had certain guiding significance for the recovery of orebodies,and theoretically analyzed the stability of the empty zone after the recovery.

关 键 词：浅埋 空场法 数值模拟 厚大矿体 

分 类 号：TD921[矿业工程—选矿] TD928