Numerical Simulation Of Groundwater Pollution And Water And Soil Pollution Evaluation And Analysis In Mining Area Of Suzhou In Mining

The purpose of this study is to take Suzhou mining area as the research object,to preliminarily find out the current status of water and soil pollution in the study area,and to make a preliminary evaluation of the water and soil environmental quality.The status quo of groundwater pollution under dynamic influence.The theoretical importance of the research has certain application value to the practice of water and soil pollution prevention and control engineering in mining areas of Suzhou and even similar scales in the country.Based on the collection,collation and analysis of the hydrogeological and water quality monitoring data in the study area,this paper carried out field investigation and analysis and sampling,and conducted indoor testing and analysis on the obtained water and soil samples.Based on the analysis results,the current assessment of water and soil pollution in the study area was carried out,and the areas near Zhuxianzhuang Coal Mine and Luling Mine,which were more polluted in the water and soil pollution assessment,were selected for numerical simulation of shallow water.The simulation model is used to simulate and predict the migration rule and development trend of Hg ions and nitrate in shallow groundwater.The following conclusions are obtained:1.The surface water quality in the area is relatively poor,mainly class Ⅴ and inferior class Ⅴ.Among them,the pollution of fluoride,COD and total phosphorus is more serious,and the pollution of heavy metals is relatively light.2.Most of the groundwater quality in the area meets the requirements of Classes II to III,and the water quality in a few areas reaches Class V,and the pollution during the rainy season is more serious than the dry season.3.Although the concentration of heavy metal ions in the soil in the area did not exceed the standard,they all exceeded the local background value to varying degrees,especially the Pb and Zn elements were heavily polluted.4.The simulation results of the model show that the migration direction of the Hg ion pollution range diffuses to the southwest as a whole,and the migration direction of the nitrate pollution range diffuses to the Xinbian River in the north direction;its maximum horizontal distance,maximum vertical distance and pollution area Both continue to increase.