Abstract:Main impacts and damages of underground coal mine on ecological system are ground deformation, ground subsidence, ground fissures and other geological hazards caused by goaf, groundwater system damage and "three wastes" discharge. It is regarded that people have not paid enough attention to the harmfulness of groundwater pollution to agriculture in mining area production and after pit closure. It is urgent to shut down polluted water wells forcibly for irrigation. Then monitoring, sealing and pollution control are needed to gradually improve the quality of groundwater in mining area. It is believed that hightemperature rock mass in coal mine is main geothermal energy. The occurrence body has good thermal conductivity. By extracting heat from circulating water through water source heat pump system, the geothermal energy around the goaf can be extracted and utilized, so that the coal mine can generate geothermal energy after production and pit closure. It is considered that key problems restricting the treatment of goaf subsidence water accumulation area is to solve the filler of filling water accumulation area and underground goaf. It is prosposed that Lunan Canal should be reformed, and the sediment of the Yellow River should be transferred to Jining and surrounding mining areas. It is believed that the key problems in the management of historical gangue mountain is the collapse, landslide, dust and other disasters in the blasting slope cutting process. It can be solved by using highpressure water guns and the joint operation of rock breaking machines and excavators.
