Not only Shanxi, let's just say that almost every coal mine will cause environmental problems. It can be divided into two stages: mining area construction stage and operation after completion. Air pollution source. Air pollution sources include smoke and dust emitted by boiler room during storage and transportation of raw coal. Coal-fired boilers are concentrated in industrial sites for heating, and the flue gas generated by boilers mainly contains smoke and sulfur dioxide. This will generally have desulfurization and dust removal equipment, with a dust removal efficiency of over 90% and a desulfurization efficiency of over 70%. In addition to boiler flue gas, the ground production system will also produce dust to pollute the environment. The links that produce dust mainly include coal transfer points, coal storage yards, loading points, waste hills and automobile transportation (it will be more serious when shale gas is mined because a large number of diesel vehicles are needed to transport a large amount of water). Sources of water pollution. Sewage mainly includes mine drainage and production, domestic sewage and wastewater. Domestic sewage is mainly the washing sewage of production and auxiliary production workshops; Domestic sewage comes from bathrooms, laundry rooms and toilets. Mine drainage mainly contains pollutants such as coal dust and stone powder; The main pollutants in production and domestic sewage and wastewater are SS, COD and BOD5. Water treatment adopts buried sewage treatment equipment. The fecal sewage of industrial sites is treated by septic tanks, and oily sewage such as machine maintenance and canteen is treated by grease trap and then enters into buried sewage treatment equipment for biochemical treatment. The effluent quality meets the second-class standard in Integrated Wastewater Discharge Standard, and can be used as greening water or discharged into nearby gullies. Each mine will have different water inflow. Mine water is treated by coagulation, sedimentation, filtration and disinfection. After reaching the standard, it can be used for underground fire sprinkler, road sprinkler and greening water. Sludge is pumped by sludge to coal storage yard, which can be used as boiler fuel. Solid waste.