文章摘要
王伟,李小龙,宋彦琦,李向上,马宏发.基于FLAC3D的巷道分步开挖支护稳定性模拟研究[J].矿产勘查,2020,11(9):2045-2052
基于FLAC3D的巷道分步开挖支护稳定性模拟研究
Simulation study of stability in the roadway of step-by-step excavation support based on FLAC3D
投稿时间:2020-04-22  
DOI:
中文关键词: 深部软岩巷道  分步开挖  FLAC3D数值模拟  位移监测  支护体
英文关键词: deep soft rock roadway,step-by-step excavation,FLAC3D numerical simulation,displacement monitoring,support body
基金项目:国家重点研发计划课题(编号:2018YFC0808402)、国家自然科学基金联合基金资助项目(编号:U1704242)及中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室开放基金课题(编号:SKLGDUEK2017)资助。
作者单位
王伟 河南龙宇能源股份有限公司陈四楼煤矿,河南 商丘 476600 
李小龙 中国矿业大学北京 力学与建筑工程学院,北京 100083 
宋彦琦 中国矿业大学北京 力学与建筑工程学院,北京 100083 
李向上 中国矿业大学北京 力学与建筑工程学院,北京 100083 
马宏发 中国矿业大学北京 力学与建筑工程学院,北京 100083 
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中文摘要:
      针对陈四楼煤矿-850m深部软岩巷道,为研究巷道开挖时和支护后围岩稳定性,本文基于巷道围岩支护理论,采用FLAC3D对巷道围岩进行模拟,锚杆加喷浆支护的方式,提高锚固岩体的稳定性,并对锚喷支护前后的围岩应力和位移变化进行分析。研究表明支护后围岩塑性区范围减小幅度在20%~30%,且最大应力值下降10.88%;有支护下的围岩位移变形量仅为未支护时围岩位移变形的5.9%;发现第二次支护对第一次支护具有加固作用,且随着开挖深度及长度的增加,支护体最大应力值和位移值均有所增加。研究工作可为相似深部软岩巷道支护工作提供依据。
英文摘要:
      For the soft rock roadway in Chensilou-850m deep, in order to study the stability of the surrounding rock during excavation and after support, this paper uses FLAC3D to simulate the surrounding rock of the roadway based on the surrounding rock support theory of the roadway. The way of protection improves the stability of the anchored rock mass, and analyzes the changes of stress and displacement of the surrounding rock before and after the bolt-shotcrete support. The study shows that the range of plastic zone of surrounding rock after reduction is reduced by 20% to 30%, and the maximum stress value is reduced by 10.88%; the deformation deformation of surrounding rock with support is only 5.9 of the deformation deformation of surrounding rock without support %; It is found that the second support has a strengthening effect on the first support, and with the increase of excavation depth and length, the maximum stress value and displacement value of the support body have increased. The research work can provide a basis for the support work of similar deep soft rock roadways
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