采动影响下沿空巷道围岩稳定性分析与控制技术研究

Research on Stability Analysis and Control Technology of Surrounding Rock in Gob Side Entry under the Influence of Mining

为解决采动影响下16305工作面回风巷变形量大的问题,通过数值模拟的方法分析巷道围岩的稳定性,并根据模拟结果与现场矿压显现情况提出巷道的支护方案。结果表明:动压影响下沿空巷道左侧的塑性区发育范围大于巷道右侧,底板岩层存在着一定的拉应力破坏区域。支护方案实施后,顶底板移近量为200mm,两帮移近量为150mm,巷道围岩变形得到有效控制。

In order to solve the problem of large amount of deformation in the return air roadway of the 16305 working face under the influence of mining, the stability of roadway surrounding rock is analyzed by means of numerical simulation, and the supporting scheme of roadway is proposed according to the simulation results and on-site strata behaviour. The results show that the plastic area along the left side of the roadway under the influence of dynamic pressure is larger than the right side of the roadway. After the implementation of the support scheme, the amount of movement of roof and floor is 200mm and two sides of that is 150mm. The deformation of roadway surrounding rock is effectively controlled.