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针对大断面特厚煤层煤巷支护难题,对巷道围岩变形破坏特征进行了研究。采用有限差分软件FLAC~(3D)对巷道围岩垂直应力、巷道围岩塑性变形破坏及巷道围岩垂直方向上的位移变化进行数值模拟,并进行了现场工程验证。提出了“普通锚杆+锚索+钢筋锚网+W钢带”耦合支护方案。
Aiming at the problem of supporting coal roadway in large cross-section and ultra-thick coal seam, the deformation and failure characteristics of surrounding rock are studied. The finite difference software FLAC ~ (3D) is used to simulate the vertical stress of surrounding rock, the plastic deformation and failure of the surrounding rock and the vertical displacement of the surrounding rock of the roadway, and the field engineering verification is carried out. Proposed “ordinary anchor + anchor + steel anchor net + W steel ” coupling support program.