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基于大倾角煤层巷道围岩破坏特征现场探测信息,建立了不同岩层倾角下巷道围岩变形破坏的数值计算模型,研究了大倾角煤层巷道围岩非对称变形破坏机制,得出围岩变形破坏的关键部位.在此基础上,提出大倾角煤层巷道围岩关键部位非对称耦合支护对策.结果表明:随着岩层倾角增加,巷道围岩变形破坏表现出明显的非对称性,通过对围岩变形破坏的关键部位进行非对称耦合支护,能够有效地实现支护与围岩之间变形协调,显著地控制围岩的非对称变形破坏.
Based on the on-the-spot detection information of the surrounding rock failure characteristics in the high angle coal seam roadway, a numerical calculation model of the surrounding rock deformation and failure under different rock dip is established. The asymmetry deformation and failure mechanism of the surrounding rock in the high angle coal seam is studied. Based on which the countermeasures for unsymmetrical coupling and support of the key rock mass surrounding rock in deep inclined coal seam are put forward.The results show that the deformation and failure of the rock mass surrounding rock mass show obvious asymmetry with the increase of rock dip, Asymmetric coupling support of the key parts of deformation and failure can effectively achieve the deformation coordination between the support and the surrounding rock and control the asymmetric deformation and failure of the surrounding rock significantly.