Abstract: The inclined orepass is an important layout method in mines at home and abroad and its deformation and failure are a serious problem in the engineering application.The root cause of the deformation and failure of orepass wall is that the ore or rock dispersions contact and make a force with the orepass wall during their moving in orepass.Different ore-rock movement characteristics in inclined orepass lead to large differences in the degree and scope of deformation and damage of orepass walls in different areas.The deformation and failure mechanism and the failure zone of inclined orepass wall were analyzed by studying the movement characteristics and its influencing factors of ore-rock dispersion moving in inclined orepass.The study results show that: ①Different ore-rock movement modes are affected by factors such as the dip angle of the slip shaft， the shape，particle size and distribution characteristics of the ore block，the physical and mechanical properties of the ore rock，the flatness of the orepass wall and the initial movement direction of the ore block when entering the slip shaft.The damage characteristics to the orepass wall are also different.②The impact damage of the orepass wall caused by the falling or jumping of the ore-rock block mainly occurs at the bottom of the orepass in the direction of the falling rock at the intersection of the branch and the main orepass，and the friction damage of the orepass wall caused by rolling or sliding is mainly distributed on the bottom plates of the branch and the main orepass. ③ According to the deformation and damage characteristics of different orepass wall，it should be prevented from the perspective of optimizing the structure of the orepass and taking corresponding reinforcement measures.

Key words: inclined orepass, ore-rock dispersion, movement characteristics, influence factor, damage and failure