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分析了沙坪矿风氧化带切巷支护难点,提出“二次成巷”掘进方式,降低了切巷支护难度,采用高预紧力锚杆锚索支护切巷,数值模拟了支护后切巷围岩应力和塑性区分布特征,矿压监测结果表明切巷变形量很小。
This paper analyzes the difficulty of roadway protection in wind oxidation zone of Shaping mine and puts forward “secondary entry” driving mode, which reduces the difficulty of laneway support and adopts high prestressing bolt and anchor cable to support laneway cutoff. The numerical simulation is carried out The characteristics of stress and plastic zone distribution in the surrounding rock of roadway after support and excavation show that the deformation of the roadway is very small.