深部开采软岩巷道过断层围岩控制技术研究

Study on Surrounding Rock Control Technology of Soft Rock Roadway Passing through Fault in Deep Mining

为解决山西马道头煤矿三采区轨道大巷通过F13断层时,由于地质构造复杂,顶底板岩层比较软,导致支护难度较大的问题,采用FLAC^(3D)软件对原支护措施下巷道围岩稳定性和加强支护后巷道围岩稳定性进行数值模拟,确定通过强化竖向支护来控制围岩变形。采用25U型钢强化巷道顶板、两帮支护,混凝土+网片底板加强支护。新的支护措施实施后,对巷道顶板位移量进行了考察,考察结果显示,加强支护措施可靠。

In order to solve the problems that support is difficult because of complex geological structure and soft roof and floor strata when the track roadway in the third mining area of Madaotou Coal Mine passes through F13 fault,FLAC^(3D)software is used to simulate the surrounding rock stability of roadway under original support measures and after strengthening support,and it is determined that the deformation of surrounding rock can be controlled by strengthening vertical support.25U-shaped steel is used to strengthen roadway roof,two-side support,concrete + mesh floor to strengthen support.After the implementation of the new support measures,the roof displacement of the roadway is investigated,and the results show that the strengthening support measures are reliable.