基于岩体质量的井筒保安矿柱优化与应用  

Optimization and Application of Shaft Safety Pillar Based on Rock Mass Quality

作　　者：刘智权[1] 李鹏程 孙丽军 刘海林[2,3] LIU Zhiquan;LI Pengcheng;SUN Lijun;LIU Hailin(Sichuan Metallurgical Design&Research Institute;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.;State Key Laboratory of Safety and Health for Metal Mines)

机构地区：[1]四川省冶金设计研究院 [2]中钢集团马鞍山矿山研究总院股份有限公司 [3]金属矿山安全与健康国家重点实验室

出　　处：《现代矿业》2024年第4期84-87,共4页Modern Mining

摘　　要：为兼顾井筒稳定和减少资源的不必要浪费,在常规的岩层移动角井筒保安矿柱圈定法基础上,采用工程类比法,将Ⅱ级岩体质量围岩部分的井筒保安矿柱尺寸优化为80m,形成上部台体下部圆柱体的保安矿柱。同时对优化后的保安矿柱周边压覆资源采取控制采场顶板暴露面积和分层充填的保护性开采措施。数值模拟结果表明:按优化后的保安矿柱范围开采周边矿体后,地表井架、卷扬机房及井筒内壁变形量均未超过最大允许变形值,说明优化方案具有可行性。In order to balance wellbore stability and reduce unnecessary waste of resources,based on the conventional method of delineation of wellbore safety pillar with rock strata movement angle,the engineering analogy method is used to optimize the size of wellbore safety pillar in the surrounding rock part of GradeⅡrock mass to 80 m,forming a safety pillar with a cylinder at the lower part of the upper platform.At the same time,the protective mining measures of controlling the exposed area of the stope roof and stratified filling are taken for the optimized overlying resources around the security pillar.The numerical simulation results show that after mining the surrounding ore body according to the optimized security pillar range,the deformation of the surface derrick,the winch room and the inner wall of the wellbore does not exceed the maxi-mum allowable deformation value,indicating that the optimization scheme is feasible.

关 键 词：岩体质量分级 保安矿柱 井筒 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]