Remote sensing monitoring and evaluation of the ecological changes in Xishan coalfield

Under the new era, the ecological environment problems are more and more emphasized by the state, society and people.By means of remote sensing and ecological index model, the dynamic monitoring of the ecological environment is carried out by selecting Xishan coalfield as the research object.The results show that the trend of remote sensing ecological index in the research area is obvious, and the remote sensing ecology index is 0.639 in 2004, 0.694 in 2010, 0.655 in 2010, the overall performance being inverted “V”pattern; the ecological index of remote sensing in the study area is mainly good, and the 2004, 2010 and 2016 respectively account for 63.74%, 75.94% and 58.77% of the total area; the gravity of different types of remote sensing ecological index has been shifted, and in which A-grade and B-level ecological index has a higher center of gravity offset, 2004-2010 offset 37.172 km, 31.255 km, 2010-2016 offset 15.270 km, 18.814 km; in the effect of the remote sensing ecological index, the effect of heat is most significant, the correlation as high as 0.859, the effect of vegetation second, the correlation coefficient 0.799, the action intensity of dry degree 0.707, the effect of humidity the smallest, and the correlation coefficient 0.596.The study find that the ecological is improved in the main mining area in the northwest region of the study area, and the ecological is deteriorated of the southeast residential area, and the ecological high region is far away from human activities, northward transfer, and the region mainly due to terrain and other reasons, the human activity interference relatively small.