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.
作者
刘智权
李鹏程
孙丽军
刘海林
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)
出处
《现代矿业》
CAS
2024年第4期84-87,共4页
Modern Mining
关键词
岩体质量分级
保安矿柱
井筒
数值模拟
rock mass quality classification
safety pillar
shaft
numerical simulation
