巷道围岩岩性松散、破碎,应力集中程度较高,围岩体整体强度偏低,在高应力作用下巷道围岩剪胀变形较为强烈,局部承载结构破坏诱发锚网支护大面积失效,承载结构稳定性降低。实施锚网—锚索耦合支护技术,根据位移分析原理,确定支护系统二次耦合支护的最佳时间(段),在关键部位实施支护体和围岩的再次耦合,最大限度地发挥围岩的承载能力,从而使支护体的支护抗力降到最小。 The surrounding rocks of the roadway are loose and fragile with high concentration of stress and the overall strength of the surrounding rock mass is relatively low. Under high stress, the dilatancy and deformation of the surrounding rock of the roadway is more intense. The failure of the local bearing structure induces large- The stability of the load-bearing structure is reduced. According to the principle of displacement analysis, the best time (segment) for the secondary coupling support of the support system is determined and the coupling between the support body and the surrounding rock is implemented again in the key part, to the maximum extent Play the bearing capacity of the surrounding rock, so that support body support resistance to a minimum.