Similar simulation of mine pressure behavior law with cross-fault of fully mechanized mining face
In order to study the influence of faults on roof failure and pressure behavior law when the comprehensively mech-anized mining face passes faults,a computational model is constructed using the theory of fracture mechanics to probe the weighting step distance of the basic roof under the action of fault activation,and the physical experimental model is built to simulate the process of basic roof's internal fracture propagation and penetration,basic roof collapse and support compres-sion when the working face passes through different faults,and the change characteristics of roof subsidence are analyzed.The research results show that when the working face passes through the fault,the fault has an activation effect on the crack on the basic roof,so that the weighting step distance of the roof becomes smaller,the crack is continuously expanded by the concentrated stress in front of the working face,and finally penetrates to the working face,resulting in the cutting failure of the roof,and causing the compressive deformation due to impact on the hydraulic support.When the working face passes through faults with different drops,it is found that the fault with large drop has a greater impact on the pressure behavior on the working face.