Abstract: Phenomenons of orepass blockage phenomenon and sidewall deformation and destruction of orepass occurs frequently during the application process of orepass，they are becoming the important influence factors of safe and efficient production of mines.Existing problems of orepass is summarized as two major problems of blockage and sidewall stability，the study status and existing problems of orepass are analyzed and summarized.The blockage phenomenon of orepass is manifested in the suspension of materials flow during the process of oredrawing at the bottom of orepass.Sidewall stability phenomenon is mainly manifested in deformation，instability and collapse of sidewall of orepass.The study results show that:①main reasons of orepass blockage can be summarized as the matching relationship among ore moisture content，powder ore content，oredrawing funnel angle，height and time of ore storage，ore-rock block size and orepass diameter，large blocks produced by support structure falling off and sidewall surrounding rock collapsing，and the existing problems in operation and management of orepass；②main reasons of sidewall deformation and destruction of orepass can be described as particle size distribution and physical and mechanical properties of ores or waste rocks，geological characteristics and stress field features of the surrounding rock of orepass engineering，orepass structure，and sidewall support strength and their mutual relationship；③the fundamental reason of deformation and destruction caused by the impact，shear and friction damage of orepass sidewall，which caused by the force action produced by the movement of ores or waste rocks in orepass and the contact of ores or waste rocks with orepass sidewall；④human destruction of orepass sidewall is intensified by blasting dredging after orepass blockage and excavation blasting near orepass.Based on the above discussion results，the study directions of orepass existing problems as followings:①studying the relationship between the influence factors of orepass blockage，establishing the relevant mathematical models，discussing the design criteria of structure and related dimensions of orepass，so as to prevent orepass blockage；②revealing the movement regularity of materials in orepass and the mechanism of mechanical action of materials on orepass sidewall，improving structure and support model of orepass，so as to solve the existing problems of orepass stability fundamentally；③studying and developing the stress releasing technique and engineering support technique under high stress environment，are the main study directions of solving the stress crack destruction problem of orepass sidewall；④orepass blockage can be prevented from aspects of design，application and management，and non-blasting dredging technique for orepass blockage can be studied，so as to reduce blasting damage to orepass sidewall.

Key words: Metal mine, Orepass existing problem, Blockage, Sidewall stability, Study direction