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通过数值分析,研究了迎采窄煤柱宽度内应力场和位移场的分布规律,探讨了邻近工作面回采对巷道围岩稳定性、围岩变形的影响,并最终确定了合理的窄煤柱宽度,同时研究得到了高强锚杆锚索加固巷道围岩,重点加固窄煤柱帮的围岩控制技术。现场应用表明,合理留设迎采窄煤柱并采用高强锚杆锚索联合支护迎采窄煤柱巷道,经历两次采动影响后,巷道围岩顶底板和两帮变形量均<300 mm,有效控制了围岩的大变形,技术经济效果显著。
By numerical analysis, the distribution law of stress field and displacement field in narrow coal pillar width is studied, and the influence of adjacent working face mining on the surrounding rock stability and the surrounding rock deformation is discussed. Finally, a reasonable narrow coal pillar Width, at the same time, the research has got high strength anchor bolt reinforcement tunnel surrounding rock, focusing on strengthening the narrow coal pillar to help the wall rock control technology. The field application shows that it is reasonable to leave the narrow pillars and adopt the high-strength anchor and anchor joint to support the narrow coal pillar roadway. After two times of mining influence, the top and bottom deformation of the surrounding rock of the roadway are less than 300 mm, effectively controlling the large deformation of surrounding rock, the technical and economic results are obvious.