多中段空区稳定性分析及间柱回采顺序优选  

Stability Analysis of Multiple Mid-section Goaf Areas of A Mine and Optimization of the Order of Inter-column Recovery

作　　者：黄德镛[1] 高聪 贾子月 吕世玮 刘孙政 郭琦 HUANG Deyong;GAO Cong;JIA Ziyue;LYU Shiwei;LIU Sunzheng;GUO Qi(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093

出　　处：《有色金属工程》2023年第6期105-114,共10页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(U1602232)。

摘　　要：以甘肃某铅锌矿为工程背景,针对矿山复杂条件下多中段采空区中遗留大量高品位的矿柱,如何安全高效回采残矿已成为提高矿山安全和经济效益的重要因素,通过对回采方案及复杂采空区的稳定性进行分析,探究最佳矿柱回采方案和回采顺序。根据研究区域的矿柱数量,对中段间、中段内开采顺序及方向进行组合,最终得出14个方案,并通过选取矿山的矿岩样品和尾砂,进行岩石室内力学参数试验,得出相应力学参数,并根据井下实际情况建立FLAC^(3D)模型。将折减后的岩体力学参数带入FLAC^(3D)数值模拟软件中,从应力、位移和塑性区等方面分析采区的稳定性,从而优选出中段自下而上、中段内采取隔一采一、由中间向两翼回采的方案。This study takes a lead and zinc mine in Gansu as the engineering background,aiming at the large number of high-grade ore columns left in the multi-middle goaf under the complex conditions of the mine,how to safely and efficiently recover the residual ore has become an important factor to improve the safety and economic benefits of the mine,and through the analysis of the recovery scheme and the stability of the complex goaf,the optimal pillar recovery scheme and recovery sequence are explored.According to the number of ore columns in the studied area,the mining sequence and direction between and in the middle section are combined,and finally 14 schemes are obtained,and the corresponding mechanical parameters are obtained by selecting the ore samples and tailings of the studied mine,and the corresponding mechanical parameters are obtained according to the actual situation of the down-hole.,the FLAC^(3D)model is established.The mechanical parameters of the reduced rock mass are brought in the numerical simulation software,and the stability of the mining area is analyzed from the aspects of stress,displacement and plastic zone,so as to optimize the bottom-up recovery scheme of the middle section,and the recovery scheme of mining from the middle to the two wings is adopted in the middle section.

关 键 词：矿柱回采 多中段采空区 采空区稳定 回采顺序 FLAC^(3D)数值模拟 

分 类 号：TD325.3[矿业工程—矿井建设] TD853.391