爆破扰动下巷道围岩临界破坏深度分析  

Analysis of critical failure depth of surrounding rock of roadway under blasting disturbance

作　　者：王夏楠[1] WANG Xianan(School of Civil and Architectural Engineering,Anyang Institute of Technology,Anyang 455000,Chin)

机构地区：[1]安阳工学院土木与建筑工程学院,河南安阳455000

出　　处：《工矿自动化》2018年第7期31-35,共5页Journal Of Mine Automation

摘　　要：基于弹性力学分析得出爆破扰动下巷道围岩临界破坏深度的数学表达式,在此基础上结合正交试验分析巷道开挖半径、爆破振动速度、围岩黏聚力等对钻爆开挖巷道稳定性的影响规律,推导出不使围岩发生破坏的临界爆破振动速度。分析结果表明,巷道开挖半径每增大1m,临界破坏深度就相应增加0.365m;随着爆破振动速度增加,临界破坏深度呈对数规律增大;随着围岩黏聚力增大,临界破坏深度呈指数规律减小;黏聚力和爆破振动速度是临界破坏深度的最显著的影响因素。Mathematical expression of critical failure depth of surrounding rock of roadway under blasting disturbance was obtained through elasticity analysis.On the basis,influence rule of roadwayexcavation radius,blasting vibration speed and cohesion force of surrounding rock on stability of roadway for drilling and blasting excavation were discussed by orthogonal test.Critical blasting vibration velocity which will not destroy surrounding rocks was derived.The analysis results show that as excavation radius of roadway increases by 1 m,the critical failure depth increases by 0.365 m;the critical failure depth increases logarithmically with increase of blasting vibration velocity;the depth of critical failure decreases exponentially as cohesion of surrounding rocks increases;cohesion and blasting vibration velocity are the most significant factors affecting the critical failure depth.

关 键 词：巷道围岩 巷道稳定性 临界破坏深度 临界爆破振动速度 爆破扰动 弹性力学 

分 类 号：TD263[矿业工程—矿井建设]