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针对榆家梁矿44305回风顺槽局部地区顶板岩层破碎、难以支护等问题,采用钻孔窥视仪,对巷道顶板岩性及裂隙发育情况进行分析。并通过建立FLAC3D数值计算模型,对巷道受采动影响后围岩垂直应力和塑性区范围进行模拟,得出巷道顶板最大破坏深度达到1.3 m。根据最大破坏深度并结合悬吊理论,进行巷道支护参数设计。现场工业性试验结果表明,支护参数优化后,巷道顶板下沉量有所减小,局部冒顶得到有效控制,取得较好的应用效果。
Aiming at the problems such as the crushing of top rock strata in some areas of 44,285 return air grooves of Yujialiang Mine and the difficulty of supporting, etc., The author analyzed the lithology and fissure development of roadway roof with drilling peep instrument. And through the establishment of FLAC3D numerical model, the vertical stress and plastic zone range of surrounding rock affected by mining are simulated. The maximum failure depth of roadway roof is 1.3m. According to the maximum depth of destruction combined with the suspension theory, parameters of roadway support design. Field industrial test results show that, after the optimization of support parameters, the subsidence of roadway roof decreases, the local roof fall is effectively controlled, and the better application effect is obtained.