破碎围岩环境下薄矿脉采场不同支撑方式能量释放规律研究  

Research on the law of energy release in narrow vein stope with breakage of surrounding rock when using different support methods

作　　者：王新民 党建东 王晓军 曾强 刘健 Wang Xinmin;Dang Jiandong;Wang Xiaojun;Zeng Qiang;Liu Jian(School of Resource and Environment Engineering,Jiangxi University of Science and Technology,Jiangxi Key Laboratory of Mining Engineering,Ganzhou Jiangxi 341000,China;Anhui Tongguan(Lujiang)Mining Co.,Ltd.,Hefei Anhui 231500,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西省矿业工程重点实验室,江西赣州341000 [2]安徽铜冠(庐江)矿业有限公司,安徽合肥231500

出　　处：《化工矿物与加工》2022年第2期21-26,40,共7页Industrial Minerals & Processing

摘　　要：针对某急倾斜薄矿脉钨矿床在采用普通留矿法开采时出现的围岩易发生板裂状垮落、采幅无法控制、只能局部挑采等问题,采用数值模拟手段模拟3种不同支护情况(无矿柱、原生矿柱、人工矿柱)下的上下盘围岩状态,结果表明:随着矿体不断上采,岩体释放的能量逐渐增大,能量变化具有一定的规律性,且在上采至一定高度后各支护方案之间表现出了明显的差异;结合位移变化情况分析,预设原生、人工矿柱对围岩的控制效果达到了矿山设计要求,而设人工矿柱的矿房在回采结束后,可以通过人工溜井回收矿石,矿石损失率较小,且不影响采场人行井与回风线路的布置。因此,建议采用人工散体矿石作为支柱支撑矿房回采薄矿脉。In order to solve the problems of the ordinary shrinkage stoping for a steep and narrow vein tungsten mine,which include the surrounding rock prone to plate cracking and falling,uncontrollable mining scale,and only local mining operation available,using the numerical simulation methods,the status of surrounding rock both the upper and lower wall were simulated under three different supporting conditions(free of pillars,primary pillars,artificial pillars respectively).The results show that with the continuous raising extraction of ore body,the energy released from the rock mass gradually increases with a certain law-likeness.At a certain mining level a significant difference of energy released was found between using different support schemes.In combination of displacement changes,analysis results show the control of the surrounding rock using primary pillars and artificial pillars can be realized to meet the mine design requirements.Upon completion of stoping,the room provided with artificial pillars may be recovered via man-made ore pass,resulting in little ores loss and no adverse effect on the passenger shaft and air return line in the stope.Therefore,it is recommended to use artificial bulk ore to support the mining room for extracting ores from the narrow vein.

关 键 词：破碎围岩 薄矿脉 矿柱 支护 能量 FLAC^(3D) 

分 类 号：TD853[矿业工程—金属矿开采]