低品位矿体回采对采空区稳定性影响数值模拟分析  

Factors Affecting the Goaf Stability of Low-grade Ore Body:from the Aspect of Numerical Simulation

作　　者：肖国喜 郁富林 XIAO Guoxi;YU Fulin(Jiangxi Guotai Wuzhou Blasting Engineering Co.,Ltd.,Nanchang 330096,Jiangxi,China;Jiangxi Blasting Engineering Technology Research Center,Nanchang 330012,Jiangxi,China;Jiangxi Hukeng Tungsten Industry Co.,Ltd.,Ji’an 343205,Jiangxi,China.)

机构地区：[1]江西国泰五洲爆破工程有限公司,江西南昌330096 [2]江西省爆破工程技术研究中心,江西南昌330012 [3]江西浒坑钨业有限公司,江西吉安343205

出　　处：《中国钨业》2022年第6期9-18,共10页China Tungsten Industry

摘　　要：为了充分回收矿产资源,弥补矿山现有生产能力之不足,本研究对江西某钨矿低品位矿体回采过程进行数值模拟,对比分析低品位矿体回采前后采空区及其邻近区域塑性区、最大主应力与竖直方向位置位移的变化特征。结果表明:对140~240 m中段低品位矿体进行回采,当前采空区及其邻近岩体塑性区、最大主应力、竖直方向位移的分布与范围不会发生明显改变,140~240 m中段低品位矿体回采总体可行。该研究为后期该钨矿低品位矿体回采方案设计提供理论依据。For the targets of recovering mineral resources and making up for the shortage of the existing production ca-pacity of the mine,this study numerically simulates the mining process of a low-grade ore body of a tungsten mine in Jiangxi Province,and compares and analyzes the changing characteristics of plastic zone,maximum principal stress and vertical displacement of goaf and its adjacent areas before and after the mining of low-grade ore body.The results show that the distribution and range of plastic zone,maximum principal stress and vertical displacement of the goaf and its adjacent rock mass will not change obviously when the low-grade ore body in the middle section of 140-240 m is mined,and the mining of the low-grade ore body in the middle section of 140-240 m is generally feasible.This study provides a theoretical basis for the mining scheme design of the low-grade ore body of this tungsten mine in the later period.

关 键 词：低品位矿体 回采 采空区 稳定性 数值模拟 

分 类 号：TD864[矿业工程—金属矿开采]