不同断面形式深埋巷道围岩破坏数值模拟分析  

Simulation analysis of surrounding rock damage for deep-buried roadway with different cross-sections

作　　者：冯海英[1] 刘德乾[1] 赵鹏燕[1] 

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2011年第3期26-30,共5页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：河北省自然科学基金项目(E2010001012)

摘　　要：以Ⅲ级围岩为例,利用有限差分软件FLAC对不同埋深情况下不同断面形式的巷道进行数值模拟,分析矩形、直墙拱形和圆形断面巷道围岩应力应变、围岩塑性区随埋深的变化规律及特点。结果表明:拱形断面巷道的围岩变形、围岩塑性区最小,尤其是顶板下沉量较矩形和圆形断面巷道的要小得多;圆形断面巷道围岩水平向位移最小;矩形断面巷道围岩应力及变形随埋深增加幅度都要大于拱形和圆形断面巷道。The roadways in the rock of Grade Ⅲ of different cross-sections in different buried depths were simulated with the finite difference software FLAC,and the stress-strain behaviors of rock,the rules of the plastic zone changing with the buried depth of the roadways with rectangular,vertical wall-arch and circular cross-section were analyzed respectively.The results show that both the surrounding rock deformation and plastic zone of the roadway with the vertical wall-arch cross-section are the smallest,the roof settlement is also less than that of the roadway with rectangular and circular cross-section;the surrounding rock＇s horizontal displacement of roadway with the circular cross-section is the smallest;as to the contents of the stress-strain increasing with the buried depth,the roadways with rectangular cross-section is better than the roadways with vertical wall-arch and circular cross-section.

关 键 词：深埋巷道 断面形式 数值模拟 围岩应力 围岩变形 塑性区 

分 类 号：TD31[矿业工程—矿井建设]