Abstract:Aiming at the issue of deformation and failure of high altitude soft broken large section roadway, the main belt conveyor roadway of Julong Copper Mine in Tibet is taken as the research subject. By using digital simulation software, the digital model is established to research the stress distribution status, displacement evolution law and plastic zone distribution law of the belt roadway and its wall rock during the excavation process, and the mechanism on deformation and failure of high altitude soft broken large section belt roadway is elaborated. The results show that the overall stress distribution of the belt roadway at the fracture zone is small, the wall rock displacement increase continuously, the failure mode is shear failure with larger range of failure, which is easy to make the belt roadway unstable. For this reason, the reasonable supporting method for the belt conveyance roadway at this position is put forward to meet the needs for the safe and efficient mining in the mine.
