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为解决充填采煤面收作眼断面大、难支护及撤架困难等难题,采用理论分析和FLAC3D数值模拟方法研究了收作眼围岩变形破坏规律,提出了滑架通道锚(索)网加强支护、“井”字型木垛封闭灌浆的临时支护和收作眼空间注浆永久支护相结合的围岩控制技术方法,优化设计了“井”字型木垛形成的混凝土墩柱支护参数。结果表明:混凝土墩柱间排距均为2 000 mm时,墩柱承载能力可满足临时支护的要求。该技术在淮北矿业集团杨庄煤矿进行了应用,通过监测工作面上方垂距约为80 m的巷道变形,其巷道累积下沉量仅为60 mm,表明收作眼围岩变形控制效果显著。
In order to solve the problems such as big eye section, difficult support and withdrawal support, the theoretical analysis and FLAC3D numerical simulation method are used to study the deformation and failure of surrounding rock in the receiving area. Network strengthening support, “well ” font woodchucks closed grouting temporary support and received as the eye space grouting permanent support combined with the surrounding rock control technology, optimized design “well ” font wood Concrete pier support parameters formed by stacks. The results show that when the row spacing of concrete piers is 2 000 mm, the bearing capacity of piers can meet the requirements of temporary support. The technology was applied in Yangzhuang Coal Mine of Huaibei Mining Group. By monitoring the deformation of the roadway with an offset of about 80 m above the working face, the cumulative subsidence of the roadway was only 60 mm, indicating that the control effect of the surrounding rock deformation was significant.