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以柳林矿3103盘区运输大巷800 m处巷道底鼓为研究对象,分析了引起巷道底鼓的影响因素,提出了巷道底鼓分类,建立了底鼓量计算数学模型。利用FLAC~(3D)数值模拟方法,对比分析了巷道原支护、底板开挖卸压槽及底板开槽与锚索联合支护情况下巷道底鼓情况,结果表明采用底板开挖卸压槽和锚索联合支护可以较好地控制巷道底鼓。
Taking the tunnel bottom drum of 800 m at the laneway 3103 in Liulin Mine as the research object, the influencing factors of the tunnel bottom drum were analyzed. The road bottom drum classification was put forward and the bottom drum calculation mathematical model was established. By using FLAC 3D numerical simulation method, the situation of roadway bottom drum under the condition of original roadway support, floor excavation pressure relief groove and floor slab slotting and anchor cable joint support is analyzed. The results show that using bottom excavation pressure relief groove Combined with the anchor cable can control the tunnel bottom drum.