Study on formation mechanism of acid mine drainage(AMD)in Songyi area
Songyi mining area with a long history of coal mining,all coal mines in Songyi mining area have stopped production and closed pits.In the long-term mining process of coal mines,a large area of goaf has been formed inside the mountain,which has seriously damaged the original hydrological,engineering and environmental geological conditions in the area,resulting in a series of new environ-mental problems under the existing geological conditions,mainly manifested in the abandoned AMD pollution.In 2017,an acid water pollution incident occurred in Jianyanhe Coal Mine in Songyi mining area,which had a serious impact on the local environment.In order to further study the formation mechanism of acid wastewater in coal mines,this paper investigated the hydrogeological conditions in Songyi mining area,including the water content of rock strata,the characteristics of groundwater recharge and drainage,the dynamic change characteristics of surface water and groundwater,and analyzed the hydrochemical formation mechanism,hydrodynamic formation mechanism,pollution causes and time-series pollution mode,and sampled the surface water in this area.The results show that the dis-charge of AMD is the main cause of surface water pollution in the study area,and the water quality mixing test shows that cascade pollu-tion is an important factor for the formation of AMD in the study area.The formation mechanism of AMD is explored from the aspects of hydrogeology and environmental chemistry,and the research results can provide some reference for other coal mines.
万方数据
维普
