Study On Ecological Environment Damage Intensity Of Coal Mine Goaf Collapse

The ecological restoration of goaf subsidence has always been an important work for the sustainable development of coal mining enterprises,and it is also a research hotspot for academic personnel at home and abroad.Under the guidance of the Party Central Committee's thought of "Lucid waters and lush mountains are invaluable assets",the goal of organic unity of economic,social and ecological benefits in the process of mining is realized,and the ecological environment of mines is effectively protected.Taking 8 coal mines in Huodong mining area of Shanxi Province as research examples,this paper analyzes the influencing factors of ecological environment damage in coal mine goaf,through data collection,remote sensing interpretation,field investigation and indoor comprehensive analysis,and studies the evaluation index system and classification of ecological environment damage intensity in coal mine goaf collapse area.The main results are as follows:(1)The index system of ecological environment damage intensity of coal mine goaf collapse is constructed.Based on the analysis and evaluation of the ecological environment damage intensity of goaf collapse,the damage degree of topography,vegetation,groundwater,surface water,land and soil,climate and geological hazards caused by goaf collapse is taken as the evaluation index of ecological environment damage intensity of goaf collapse.(2)The classification standard of ecological environment damage intensity in coal mine goaf is established.The grade of damage intensity of ecological environment in coal mine goaf is divided into five grades:mild,general,serious,serious and extremely serious,And according to the evaluation score quantitative classification,The five grades correspond to 80?100,60?80,40?60,20?40,0?20.(3)The damage intensity of ecological environment in goaf of coal mine was evaluated.Through the case of 8 coal mines according to the grid of 1 km×1 km,Finally,it is divided into 52 evaluation units.Of these,17 were critical evaluation units,Area km2,15.1938 33.04%of the total coal mine area,The second is that the general damage accounts for 30.62%of the total coal mine area,more serious damage accounts for 18.27%of the total coal mine area,minor damage accounted for 9.57%of the total coal mine area,and serious damage accounted for 8.51%of the total coal mine area.Comprehensive analysis of the actual situation of the case coal mine,the case coal mine goaf collapse ecological environment damage intensity grade is serious.(4)The technical measures of restoration and treatment of ecological environment in coal mine goaf collapse area were explored.Based on the evaluation results of the case coal mine and combined with the technical measures of mine ecological environment restoration and treatment,agricultural engineering measures are mainly taken to repair and control the collapse land in the goaf of coal mine.The agricultural engineering technical measures are matched to improve the efficiency of ecological environment restoration and treatment.To sum up,this study has constructed the evaluation index system of ecological environment damage intensity of coal mine goaf collapse place,established the classification standard of ecological environment damage intensity of coal mine goaf collapse place,determined the index weight by AHP,analyzed and evaluated the ecological environment damage intensity of case coal mine by fuzzy comprehensive evaluation method,determined the ecological environment damage intensity level of case coal mine collapse place,and put forward the agricultural engineering treatment measures for each grade,which provided the theoretical basis for the ecological environment restoration and treatment project of coal mine goaf collapse place.