不同深度软弱煤岩矩形巷道的FLAC3D数值分析  

Analysis of FLAC3D in tunnel with different depth of soft coal and rock

作　　者：曹日跃 吴德义[1] 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《河南城建学院学报》2016年第6期49-54,共6页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金(51374009)

摘　　要：利用FLAC3D软件对某深部矩形巷道进行开挖模拟,得到巷道在不同深度下的应变分布规律及塑性圈破碎范围。并得出以下结论:(1)随着巷道埋深的增加,巷道帮部位移和顶板位移变形都随之增大,且前者的变形速率明显大于后者,得出巷道帮部和拐角处是巷道支护的关键部位;(2)随着埋深增加,巷道塑性区范围也明显增加,且巷道帮部和拐角处的塑性区增加趋势大于顶板,再次表明巷道帮部和拐角处在开挖中最容易被破坏。结论可为类似工程设计与施工提供参考。Using FLAC3 D software to simulate the excavation of a deep rectangular tunnel,the distribution law of the strain and the plastic ring breaking range under different depth are obtained. And conclusions are as follows：（ 1） with the increase of the depth of the roadway,the roadway sides and roof displacement displacement increase,and the displacement and deformation of roadway sides deformation rate are significantly greater than the roof,the sidewall and the corner are a key part of roadway.（ 2） with the increase of buried depth,the plastic zone of roadway is increased obviously,and the plastic zone at the corner of the roadway is larger than that of the top plate,which can provide reference for similar engineering design and construction.

关 键 词：矩形巷道 FLAC3D 松动圈 关键部位 

分 类 号：TD263[矿业工程—矿井建设]