层状岩体中拱形巷道拱肩破坏机理分析  

Spandrel Failure Mechanism Analysis of Arched Roadway in Layered Rock Mass

作　　者：谷拴成[1] 王恩波[1] 史向东[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《煤矿安全》2014年第11期172-175,179,共5页Safety in Coal Mines

基　　金：陕西省教育厅科研项目计划资助项目(2013JK0961)

摘　　要：将拱形巷道层状岩体简化成悬臂岩梁模型来分析,通过对3层相邻岩体之间受力状态分析,考虑岩层挠曲变形时层与层之间摩擦力的作用,迭代出了每一岩层所受上覆岩层对其压力的大小及其传递关系。求出层状岩体中的水平应力,对每一岩层进行判断并求出破坏的具体位置,认为层状岩体中拱形巷道容易在拱肩处发生垮落。最后通过禾草沟煤矿5#回风大巷的实际情况,验证了这种破坏机理。Simplified arched roadway in layered rock to cantilever rock beam model, by stress state analysis of any three stratums, we considered the friction effect between stratum and stratum caused by stratum flexural deflection, and iterated size and transmission rela- tionship of compressive stress of any stratum beard from strata that above it. We calculated the horizontal stress in layered rock mass, determined each strata and the location of damage, and considered arched roadway in layered rock was easily failure at spandrel. The failure mechanism is validated by Heeaogou Coal Mineg 5^# return air roadway.

关 键 词：拱形巷道 层状岩体 拱肩 破坏机理 回风巷 

分 类 号：TD322[矿业工程—矿井建设]