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分析了单向肋梁的力学特性,介绍了巷道交叉点常见的破坏形式及特点。根据雅店煤矿辅助运输大巷的工程条件,采用单向肋梁柔性支护方式,即锚杆+钢筋梯子梁+锚索+托梁+金属网+钢筋混凝土联合支护方式,对辅助运输大巷三号交叉点进行支护,监测结果表明:顶板下沉为围岩的主要变形,最大变形量为22 mm;底板和两帮变形量相当且远小于顶板变形量;支护效果较好,围岩变形得到了有效控制。
The mechanical characteristics of the unidirectional rib are analyzed, and the common damage forms and characteristics at the crossing of the roadway are introduced. According to the engineering conditions of Yadian Coal Mine Auxiliary Transport Lanes, the flexible supporting method of single-direction rib beam is adopted, that is, the bolting + steel ladder beam + anchor + joist + metal mesh + reinforced concrete joint support mode, The results show that the roof subsidence is the main deformation of the surrounding rock, the maximum deformation is 22 mm; the deformation amount of the bottom plate and the two gangues is equal to and far less than the deformation of the roof; the supporting effect is better, Surrounding rock deformation has been effectively controlled.