巷道围岩变形控制技术研究

Research on Deformation Control Technology of Tunnel Surrounding Rock

为了解决回风大巷围岩变形量大的问题,利用数值模拟软件对原支护方案下的巷道变形情况进行分析,得出原支护方案下巷道两帮移近量最大值为397 mm,巷道顶底帮的最大变形量分别为0.326 m和0.185 m,确定对巷道顶板支护进行优化,在原有支护方案的基础上进行顶板锚索补强支护,经过补强支护后巷道顶底板及两帮的移近量分别为241、158 mm,巷道变形量控制在了容许范围内,为企业降本增效提供一定的参考。

In order to solve the problem of large deformation of the surrounding rock in the return air roadway,numerical simulation software was used to analyze the deformation of the roadway under the original support scheme.It was found that the maximum displacement of the two sides of the roadway under the original support scheme was 397 mm,and the maximum deformation of the top and bottom sides of the roadway were 0.326 m and 0.185 m,respectively.It was determined to optimize the roof support of the roadway.On the basis of the original support scheme,the roof anchor cable reinforcement support was carried out.After reinforcement support,the displacement of the top and bottom walls of the roadway and the two sides were 241 mm and 158 mm,respectively.The deformation of the roadway was controlled within the allowable range,providing a certain reference for enterprises to reduce costs and increase efficiency.