The feasibility analysis of excavating the subsidence area hanging wall ore based on the solid-liquid coupling model

With the progress of mining and processing technology,in order to recycling more useful resources as many as possible,in need of recycling the subsidence area hang wall ore in a certain iron mine,and some hang wall ore is located near the east flood control dam reservoir,the surface is not allowed to collapse,to ensure the safety of flood control dam and the main mining area of the iron mine,we need to analyze its mining feasibility.Solid-liquid coupling model is established in this paper,through the finite element software to simulate the excavation progress,and analyze the stress,displacement and safety factor.The simulation results show that excavating the part of the hanging wall ore may lead to the connect between surface water and underground stope,and the water in the reservoir may flow direction the main mining area,then the production safety in the main mining area can be influenced,it is recommended that all mining activities be banned near the flood control dam area,this part of the ore body can not be recycled.