倾斜产状软弱夹层贯穿巷道围岩稳定性分析

 研究倾斜产状软弱夹层从不同部位贯穿巷道对巷道围岩稳定性的影响，利用数值仿真软件Flac3D分析相同条件下无软弱夹层、软弱夹层贯穿巷道顶部、中部、底部四种模型中软弱夹层对巷道围岩位移场、应力场以及塑性区的影响。数值结果对比表明：软弱夹层的存在导致巷道围岩整体位移场、应力场分布不均匀，塑性区范围增加，存在软弱夹层的部位容易发生大变形，相对来说软弱夹层贯穿巷道顶部时巷道的顶板稳定性最差。针对现场的巷道变形观测也验证了数值模拟的分析结果。若巷道中有软弱夹层贯穿时，应采取相应的支护措施控制软弱夹层引起的位移、应力集中以及塑性区的增加，对今后相应条件下的支护措施有一定的指导意义。

Analysis on Surrounding Rock Stability of Mine Roadway with Inclined Occurrence Soft Weak Partings in Different location

In order to research to the influence of the tilted weak intercalation throughout roadway form different site on stability of surrounding rock,analyse the influence of the weak intercalation on the displacement field, stress field and plastic zone of surrounding rock of which no weak intercalation,weak intercalation throughout roadway on top,middle,bottom four models under the same condition by using numerical simulation software Flac3D. Comparison of numerical results show that existence of weak intercalated layers lead to overall roadway surrounding rock displacement field,stress field non-uniform distribution, the increased scope of plastic zone, the parts of weak intercalated tend to large deformation, Relatively the roadway roof stability of the worst when the weak intercalated through the top of roadway.The roadway deformation observation in the field also verify the results of the numerical simulation analysis. If there is weak intercalated layers throughout the roadway,it should take corresponding support measures to control displacement, stress concentration and the increase in plastic zone caused by weak intercalation, having the definite guiding significance for support measures under appropriate conditions in the future.