Research on the extraction of geological environmental factors and comprehensive evaluation of environmental restoration and management zoning in open-pit coal mines

In order to further explore the existing risk factors of open-pit coal mine and the subsequent environmental restoration and management path, in the case of Yunan Coal Mine abandoned open-pit coal mine in southwest China, based on the basic image information of the mine drone tilt photography method of mine area, comprehensive application of ArcGIS software, FLAC^3D software and other software comprehensive analysis of the mine regional geological conditions, clear the mine slope, slope height, slope stability, land occupation and damage, dangerous rock distribution and slope type distribution. In addition, the comprehensive evaluation model of open-pit coal mine is established through expert interview method, and the comprehensive evaluation of restoration and management is combined with the data of evaluation factors. The results show that although there is no geological disaster in the mining area, the land occupation and damage in the mining area is serious. Therefore, in the subsequent work, the slag and rock materials occupying the existing soil should be transferred, and then targeted soil control measures should be carried out in combination with the soil pollution situation. There are serious geological environment problems in this area, which requires geotechnical engineering treatment. This is mainly due to the vibration caused by mining and blasting, which leads to the unstable high and steep rock slope.