Subregional evaluation of the current state of mine geological environment in Zigong city

Based on the collection of relevant data in the research area, this paper combines the mine geological environment survey data and field conditions in Zigong city to divide the mine geological environment assessment into two sub-systems:mine geological environment impact and mine geological environment restoration management.The four evaluation factors of sudden geological environment impact, continuous geological environment impact, mine geological environment mine restoration management difficulty, and man-made conditions are listed.In accordance with the actual situation and the people-oriented premise of mine geological environment restoration and management, the amount of capital investment, the rate of mine geological environment restoration, the government's wishes, and the people's requirements are used as part of the evaluation index, combined with mudslides, landslides, ground collapse, collapse, ground cracks, water pollution, structural damage and dredging of aquifers, soil pollution, topographical and landscape impacts, land occupation and damage assessment indicators, and established a mine geological environment evaluation system in Zigong city.By constructing a multi-level fuzzy comprehensive evaluation model and using the analytic hierarchy process, comprehensive regional evaluation of the mine geological environment in Zigong city is conducted.The results show that Zigong city has one “excellent” geological environment area, one “good” area, two “medium” areas, and two “poor” areas.