王庄煤矿厚煤层掘进巷道围岩变形控制技术

Surrounding rock deformation control technology of thick coal seam roadway driving in Wangzhuang Mine

为了解决王庄煤矿厚煤层回采巷道掘进过程中遇到的顶板及煤柱帮变形显著问题,以9106外风巷掘进工作面为研究对象,分析了原支护方案存在的问题及巷道围岩变形破坏特征,提出了掘进支护优化方案,采用FLAC3D软件模拟了原支护方案及支护优化方案的围岩控制效果,最终通过现场试验验证了提出的支护优化方案的合理性。现场监测结果表明:采取掘进支护优化方案后,巷道变形稳定后的顶底板移近量为76 mm,同原支护相比降低了81.5%;两帮移近量为49 mm,同原支护相比降低了89.3%。该技术有效控制了巷道掘成后围岩的变形破坏。

In order to solve the significant deformation of the roof and coal pillar wall encountered in the process of driving the thick seam mining roadway in Wangzhuang Mine,No.9106 outer air roadway driving working face was taken as the research object,the problems existing in the original support scheme and the deformation and failure characteristics of the surrounding rock of the roadway were analyzed,and the optimization scheme of driving support was proposed.FLAC3D software was used to simulate the surrounding rock control effect of the original support scheme and the optimization scheme.Finally,the rationality of the proposed support optimization scheme was verified by field tests.The field monitoring results showed that after adopting the optimized tunneling support scheme,the roof and floor displacement after the stabilization of roadway deformation was 76 mm,which was 81.5%lower than the original support;The displacement of the two sides was 49 mm,which was 89.3%lower than the original support;The deformation and failure of surrounding rock after roadway excavation were effectively controlled.