| With the progress of science and technology and the rapid development of human society,more and more attention has been paid to the encroachment and destruction of ecological environment.Human beings are not limited to the expectation of higher social and economic benefits,the coordinated development of human and nature and the sustainable development of social economy are the trend and direction of the new century.Coal resources are important resources to create remarkable economic and social benefits,but the damage of ecological environment caused by mining activities deserves more attention.Therefore,it is significante to monitor and evaluate the ecological environment of mining subsidence area.Based on matei in coal mine as the research object,this paper based on the Landsat 8 OLI multispectral Remote Sensing image,based on a ENVI,Arc GIS platform computing matei in the mining area Ecological Remote Sensing Index(Remote Sensing Ecological Index,RSEI),to make in coal mine in 2016,2017,2018 and 2019,the changes of Ecological environment monitoring and analysis,and the Ecological Index of Remote Sensing classification statistics,quantitative assessment each year ma tai in Ecological environment situation of coal mine,Combined with the measured subsidence value of Mataihao Coal Mine subsidence area from 2018 to 2019,this paper also studies and analyzes the impact of mining subsidence on ecological environment change.The main research contents and results are as follows:(1)From 2016 to 2019,the ecological environment of Mataihao Coal Mine increased first and then decreased,showing a slight upward trend compared with 2016.The mean values of the remote sensing ecological index(RSEI)in 2016,2017,2018 and 2019 were 0.4176,0.4599,0.5076 and 0.4254,respectively,and most of the ecological environment levels in the study area were in poor or general level.Among them,the research results show that the influence of the green index and humidity index contained in the index is greater than the dryness index and heat index,indicating that the ecological restoration power of Mataihao Coal Mine is greater than the ecological destruction power.On the whole,the ecological environment quality of Mataihao coal mine is changing in the direction of improvement.(2)In order to further explore the impact of mining subsidence on the ecological environment of Mataihao Coal Mine,this paper not only studies the whole mining area of Mataihao Coal Mine,but also makes a statistical analysis of local areas: the first mining area is taken as the experimental area,and a control area is set to analyze its ecological environment conditions for comparative analysis.The results show that the subsidence of green degree index is affected,the humidity index,heat dryness index and index all have a certain degree of influence,for the comprehensive expression of four ecological environment index of RSEI index,research shows that after the subsidence accumulates to a certain value,will have a negative impact on the ecological environment,ecological environment quality declining significantly.(3)In combination with the measured subsidence data of the local subsidence area of Mataihao Coal Mine,the regression fitting analysis between the subsidence data and the remote sensing ecological index(RSEI)is made.The experimental study shows that the subsidence has almost no effect on the change of ecological environment before the subsidence value reaches 0.5m.However,when the subsidence value is within the range of 0.5m-2m,the slight subsidence has a positive effect on the ecological environment change of Mataihao Coal Mine.After the subsidence value is 2m,the more serious ground subsidence has a negative impact on the ecological environment change.Based on the research results,combined with the predicted subsidence,the ecological environment of Mataihao Coal Mine is predicted.After the completion of the first stage of mining,the area with serious subsidence has seen an decline in the ecological environment quality. |
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