不同水平应力下深部回采巷道围岩变形破坏特征  

Failure Features of Surrounding Rock in Deep Mining Gateway Under Different Horizontal Stress

作　　者：杨睿[1] 

机构地区：[1]山东科技大学土木工程与建筑学院

出　　处：《工程建设与设计》2016年第8期71-73,76,共4页Construction & Design for Engineering

摘　　要：采用UDEC离散元程序,对不同水平应力埋深下的深部回采巷道围岩变形特征进行了分析。结果表明：侧向系数相同时,随巷道埋深逐渐增大,围岩塑性区范围及变形量都逐渐增大,但围岩塑性区在增长过程中存在突增现象,而巷道围岩变形量基本呈线性增长;当水平应力较大时,巷道围岩塑性区在垂直方向的发育范围较水平方向的范围大,需加强巷道顶板及底板的支护;当水平应力较小时,巷道围岩塑性区在水平方向的发育范围较垂直方向的范围大,需加强巷道两帮支护。The deformation characteristics of surrounding rock of deep mining roadway under different horizontal stress depth are analyzed by using UDEC discrete element program. The results show that with the same lateral coefficient, the plastic zone of surrounding rock and the deformation of surrounding rock gradually increase with the increase of the depth of the tunnel. The plastic zone of the surrounding rock in the growth process exists surge phenomenon, while the deformation of surrounding rock is increasing linearly. When the horizontal stress is large, the plastic zone of roadway surrounding rock is larger than the horizontal direction in the vertical direction, and the support of the roof and floor should be strengthened. When the horizontal stress is small, the plastic zone of roadway surrounding rock is larger than the vertical direction in the horizontal direction, and the both sides need to be strengthened.

关 键 词：水平应力 深部 巷道 UDEC 塑性区 

分 类 号：TD313.1[矿业工程—矿井建设]