大断面厚顶煤回采巷道强帮强角支护技术研究

Research on Strong Support Technology for Thick Top Coal Mining Gateway in Large Section

针对马脊梁煤矿大断面厚顶煤回采巷道顶板及两帮存在煤体随掘随落,巷道围岩变形量大,支护效率低,支护难度大的问题,采用现场调研、数值模拟分析对回采巷道围岩应力位移分布情况进行分析,提出在增强顶板锚杆、锚索协同性的基础上,应加强两帮支护的巷道支护对策,并对不同优化方案进行模拟分析对比,得出适合马脊梁煤矿大断面厚顶煤回采巷道的支护方案。

Aiming at the problems of large deformation of surrounding rock, low support efficiency and difficult support in the roof and two sides of the thick top coal mining roadway of large section, Majiliang Colliery, the paper first analyzes the displacement distribution of surrounding rock stress in mining roadway by field investigation and numerical simulation, then proposes strengthening the two gangs support on the basis of enhancing the synergy between roof bolts and anchor cables, and finally obtains support scheme suitable for the large section thick top coal mining roadway in Majiliang Colliery by simulating and analyzing different optimization schemes.