Abstract: o reduce the influence on surface deformation and flood control dam caused by mining of hanging wall ore in Chengchao iron mine,the similar material simulation experiment was made to establish the similar model of hanging wall ore.Then,the fill stoping simulation tests were carried out to analyze the influence of surface deformation and the flood control dam and the rock deformation in exploration of hanging wall ore.Experiment results showed that the exploration of hanging wall ore V₃ ore-body may result in deformation of flood control dam and dramatic increase in deformation of surrounding rock between flood control dam and V₃ ore body.Fractures between the flood control dam and V₃ ore body is further extended,which endangers the safety of the main stope in Chengchao iron mine.It is Suggested that the V₃ ore body be not mined.Finally,the potential dangers in exploring the hanging wall ore is analyzed,and the effective prevention measures are proposed,which have a certain guiding significance in safe production of hanging wall ore.

Key words: Similar simulation, Hanging wall ore, Surface deformation, Security