摘要
针对姚家山煤矿回采巷道锚杆支护设计,采用FLAC3D5.00中Cvisc蠕变模型与Cable结构单元,分析埋深1050m的煤巷在蠕变作用下围岩变形与锚杆(索)应力变化规律。研究表明:在超千米深井高地应力条件下,巷道服务年限内(1.5a),锚杆支护煤巷由时间效应引起的变形量占总变形量的19%~77%,巷道变形依次经历瞬时变形区、静力平衡区、衰减蠕变区和等速蠕变区;锚杆(索)由时间效应引起的附加应力占总应力的31%~37%,锚杆(索)应力变化依次经历瞬时增阻区、静力平衡区、衰减增阻区和等速增阻区。
Aiming at the bolt supporting design of stoping roadway in Yaojiashan coal mine, Cvisc creep model and Cable struc- ture unit in FLAC3D 5.00 were used to study the deformation of surrounding rock and stress variation of bolt （cable） under creep effect in coal roadway at a depth of 1050 m. The results showed that, under the stress condition of coal mine at the depth more than 1000 m and within the roadway service life （1.5 a）, the deformation of coal roadway with bolt supporting caused by time effects accounted for the total deformation of 19% ~77 %; the roadway deformation experienced four stages from instanta- neous deformation, static equilibrium, attenuation creep to constant creep. Moverover, the additional stress in bolt （cable） caused by time effects accounted for the total stress of 31% ~37 %, and the stress in bolt （cable） experienced instantaneous in- crease area, static equilibrium area, attenuation increasing area, and constant increasing area.
作者
刘建伟
王永佳
宋选民
伊康
LIU Jianwei WANG Yongjia SONG Xuanmin YI Kang(Taiyuan University of Technology, Taiyuan, Shanxi 030024, Chin)
出处
《矿业研究与开发》
北大核心
2017年第6期14-17,共4页
Mining Research and Development
基金
国家科技支撑计划项目(2007BAK29B02)
关键词
超千米深井
煤巷
锚杆支护
蠕变
数值模拟
Mine at a depth more than 1000 meters, Coal roadway, Bolt supporting
Creep, Numerical simulation
