矿井掘进工作面顶板支护研究

Study on Roof Support of Mine Heading Face

为了解决掘进过程中顶板下沉量大的问题,以马道头煤矿为研究对象,对顶板支护进行一定的研究,利用数值模拟软件对无支护条件下巷道围岩应力位移情况进行分析,根据模拟结果给出三种支护方案,对比三种支护方案,发现方案二下巷道顶板下沉量最小,所以对方案二进行应用分析,发现经过对顶板支护的优化不仅可以改变顶板的受力情况,同时可以降低两帮移近量。

In order to solve the problem of large roof subsidence during tunneling,this paper takes madoitou coal mine as the research background to study the roof support,analyzes the stress and displacement of roadway surrounding rock under the condition of no support by using the numerical simulation software,gives three support schemes according to the simulation results,compares the three support schemes,and finds that the roof subsidence of roadway under scheme two is the smallest,so the application analysis of scheme two is carried out.It is found that the optimization of roof support can not only change the stress of roof,but also reduce the displacement of two sides.