摘要
为了研究最大主应力方向对巷道围岩稳定性的影响,以贵州某矿1101工作面矩形运输巷为工程背景,采用FLAC3D数值模拟软件,研究了最大主应力为水平或垂直应力时巷道围岩变形情况。研究结果表明:当最大主应力为水平应力时,顶板受影响较大,易发生较严重的剪切破坏,且顶板位移较两帮大,应着重加强顶板支护;当最大主应力为垂直应力时,两帮受影响较大,易发生剪切破坏,且顶板和两帮位移均随垂直应力增大而明显增大,应着重加强两帮支护。根据数值模拟结果及该工作面水平应力大于垂直应力的情况,近似将水平应力作为最大主应力,提出了以顶板支护为主的支护方案。现场监测结果表明,采用该支护方案后,巷道顶板及两帮位移均较小,验证了该方案能较好地维护巷道围岩稳定性。
In order to research influence of the maximum principal stress direction on stability of roadway surrounding rock,taking rectangular haulage roadway of 1101 working face in a mine in Guizhou as engineering background,deformation of roadway surrounding rock was researched when the maximum principal stress was horizontal or vertical stress by use of FLAC3Dnumerical simulation software.The research results show that when the maximum principal stress is horizontal stress,roof is greatly affected and prone to serious shear failure,and roof displacement is larger than that of two sides,so roof support should be strengthened.When the maximum principal stress is vertical stress,two sides are greatly affected and are prone to shear failure,and displacements of roof and two sides increase obviously with the increase of vertical stress,so two sides support should be strengthened.Based on numerical simulation results and the situation that horizontal stress is greater than vertical stress of the working face,the horizontal stress is approximately regarded as the maximum principal stress,and a supporting scheme was proposed which focused on roof support.The field monitoring results show that displacements of roadway roof and two sides are small after applying the support scheme,which verifies that the support scheme can maintain stability of roadway surrounding rock well.
作者
李桂明
周超
王晓东
LI Guiming;ZHOU Chao;WANG Xiaodong(Guizhou Provincial Research Institute of Mine Safety and Science,Guiyang 550025,China;Guizhou Coal Mine Design Research Institute Co.,Ltd.,Guiyang 550025,China;Guizhou Branch of Jiangxi Coal Mine Design Institute,Guiyang 550003,China;Mining College,Guizhou University,Guiyang 550025,China)
出处
《工矿自动化》
北大核心
2019年第10期38-42,73,共6页
Journal Of Mine Automation
基金
贵州省科学技术基金资助项目(黔科合基础〔2019〕1189号)
关键词
工作面巷道
围岩稳定性
巷道支护
顶板支护
两帮支护
最大主应力
水平应力
垂直应力
working face roadway
surrounding rock stability
roadway support
roof support
two sides support
the maximum principal stress
horizontal stress
vertical stress
