Evaluation of ecological restoration effect in Baorixile Open-pit Mine Area based on remote sensing ecological index

Open-pit mining of coal resources has seriously damaged the ecological environment in and around the mining area, and the realization of green development requires mining enterprises to carry out environmental governance and ecological restoration in the damaged areas in time.In order to evaluate the environmental treatment and ecological restoration effect of Baorixile Open-pit Mining Area, this paper selects multi-temporal Landsat remote sensing images within the mining area, calculates the remote sensing ecological index of the area from 1996 to 2019, selects the repaired area and the control area within the mining area, and compares the remote sensing ecological index of different stages before, during and after mining, monitor the changes of ecological environment in the whole area, repaired area and control area of the mining area.The results show that the green index, dryness index, humidity index and heat index of the mining area show a trend of first decreasing and then increasing with the development process of the mining area, especially in the internal waste dump area where large-area ecological restoration has been carried out, the component index and the remote sensing ecological index have recovered to the average level of the mining area, and the ecological restoration effect is good.Due to the expansion of pit area and the increase of bare soil area in the mining area, the overall remote sensing ecological index decreased significantly from 1996 to 2010.However, with the support of ecological restoration funds invested by the government and mining enterprises, the ecological environment in the mining area is gradually improving, the decline of remote sensing ecological index decreases year by year, and the ecological restoration results are remarkable.