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根据巷道围岩应力变化特点结合锚固体变形破坏的相似材料模拟试验， 分析了巷道两帮锚固体的变形破坏特征， 指出锚杆支护巷道两帮表面主要发生张性破坏， 锚固体内部发生剪切破坏， 据此建立起回采巷道锚杆支护两帮稳定的分析模型， 提出了两帮稳定的判别准则， 即锚固体中锚杆的拉应变必须小于锚杆的允许拉应变， 在巷道两帮围岩较松软时， 还必须满足巷道周边位移值的要求
According to the characteristics of stress change of surrounding rock and the simulating experiment of similar materials for the deformation and failure of the anchor, the deformation and failure characteristics of the two anchors in the roadway are analyzed. It is pointed out that the tensile damage occurs mainly on the two surfaces of the bolt supporting tunnel, Cut and destroy, so as to establish the analytical model of the stability of the two sides of bolt support in mining roadway, and put forward the criterion of two-step stability, that is, the tensile strain of anchor rod in anchor must be less than the allowable tensile strain of bolt. When the surrounding rock is softer, it must also meet the requirements of displacement values around the roadway