Abstract: Geodynamic disasters in coal mines often cause the collapse and blockage of the excavation space roadway,which seriously threatens the safety of underground workers in coal mines.The mechanical structure and accumulation form of the loose and broken accumulations formed by the collapse are very complicated,so how to quickly clear the collapsed accumulations and construct the rescue passage is an urgent scientific problem to be solved.On the basis of analysing the current situation and problems in research on the structural transport laws of catastrophic col-lapsed bodies and the construction of rescue routes,and in view of the complexity of the mechanism of pile blocking of collapsed piles and the uncertainty of the laws of disturbance and deformation.Firstly,a two-dimensional computa-tional model of the collapsed pile was constructed based on the particle flow numerical simulation software,and the motion characteristics of the particles in the process of constructing the rescue channel inside the collapsed pile were investigated,and the disturbance law of its excavation was clarified;Secondly,the stress redistribu-tion characteristics in the pile under the conditions of constructing the rescue channel in different areas were analysed,and the construction location of the rescue channel in the collapsed pile was preferred;Finally,according to the me-chanical characteristics of the collapsed pile and the pile morphology,a new rapid construction method of the res-cue channel is proposed.The results show that:under the influence of the disturbance of excavation to build the res-cue channel,the rock body of the collapsed pile has a tendency to move towards the excavation space,and the farther away from the excavation position,the smaller the influence of the disturbance is;the secondary collapse of the col-lapsed pile to the excavation space is mainly in the vertical direction,and the horizontal direction is secondly;the col-lapsed pile is in the shape of a“trapezoid”after the excavation is stabilised in the lower left,and in the shape of“V”after the excavation is stabilised in the middle and lower parts of it;Considering the influence of secondary disturbance,the stability of the supporting structure and the source structure of the collapsed pile,it is appropriate to choose the location of the rescue channel in the middle of the collapsed pile.