煤矿安全2017，Vol.48Issue(5)：57-60,4.DOI:10.13347/j.cnki.mkaq.2017.05.016
层状岩体圆形巷道破坏特征及锚固支护对比试验研究
Experimental Study on Deformation and Failure Characteristics of Circle Roadway and Anchorage Support Contrast in Layered Rock Mass
摘要
Abstract
In order to obtain the circular roadway deformation and failure characteristics and the anchoring effect in layered rock mass,by using CM60/10 plane strain test-bed and combing with three-axis servo testing machine,through the method of similar material simulation,we loaded initial circular roadway with 400 m depth in layered mass step by step.The deformation and failure characteristics of surrounding rock of roadway under no supporting state and bolt-mesh-cable-shotcrete support state were analyzed.Experimental result shows that under no supporting state,the two sides of surrounding rock became the shape of "wedge".Taking roadway waist line as the center,two sides of shallow surrounding rock appear mutually vertical movement;the rock whose shape is "crescent" dropped from the roof,and the floor appears bulge obviously,and the deformation and failure characteristics of surrounding rock were serious;under no supporting conditions,roadway roof subsidence and floor heave quantity of bottom increased obviously in the late loading;under the condition of the same ground stress and anchorage support,amount of floor heave at the bottom and the subsidence of roof were basically linear growth in slow rate.It showed that the supporting controlled the deformation and failure effectively.关键词
层状岩体/圆形巷道/锚网索喷支护/变形破坏/巷道支护Key words
layered rock mass/circular roadway/bolt-mesh-cable-shotcrete support/deformation failure/roadway support分类
矿业与冶金引用本文复制引用
洛锋,王凯,李海江,崔景昆,郭利军,张浩..层状岩体圆形巷道破坏特征及锚固支护对比试验研究[J].煤矿安全,2017,48(5):57-60,4.基金项目
河北省教育厅科学研究计划资助项目(QN2015069) （QN2015069）
邯郸市科技局计划资助项目(1521109072-7) （1521109072-7）
