大采高回采巷道锚杆预应力支护研究

Study on Bolt Prestress Support in Large Mining Height Roadway

以补连塔矿22309回采巷道为工程实例,分析它在掘进前和回采时巷道围岩变形规律,对在零原应力场条件下,应用FLAC^(3D) 模拟软件对大采高回采巷道进行模拟支护。通过对锚杆不同支护参数匹配方案进行实验,从而得出预应力锚杆的支护原则进行此类巷道的支护。

By means of 22309 mining roadway as an engineering example in Bulianta coal mine, in thecondition of zero original stress field, FLAC30 simulation software is applied to simulate support for themining roadway. Through the experiment of different support parameter matching scheme, the supportprinciple of the prestressed bolt is put forward.