超千米深井锚杆支护煤巷蠕变规律数值模拟研究  

Numerical Simulation Study on Creep Laws of Coal Roadway with Bolting Support at a Depth More than 1000 Meters

作　　者：刘建伟[1] 王永佳[1] 宋选民[1] 伊康 LIU Jianwei WANG Yongjia SONG Xuanmin YI Kang(Taiyuan University of Technology, Taiyuan, Shanxi 030024, Chin)

机构地区：[1]太原理工大学,山西太原030024

出　　处：《矿业研究与开发》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)

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.

关 键 词：超千米深井 煤巷 锚杆支护 蠕变 数值模拟 

分 类 号：TD353.6[矿业工程—矿井建设]