关键词: 矿区生态修复, 地质环境承载力, 评价指标体系, 综合评价法, 层次分析法, 绿色矿山

Abstract: In order to effectively deal with the unreasonable mining activities such as over-exploitation and disorderly mining in Baimahongge mining area in Sichuan Province，aiming at the insufficiency of the conventional methods that are difficult to carry on the quantification analysis of the mine geological environmental bearing capacity，combined with the special natural environment characteristics of the mining area，14 indexes including physical geography， social economy，mine development，mine environment and basic geology are selected.The evaluation index system of geological environmental bearing capacity of the mining area is established，and the comprehensive evaluation method-analytic hierarchy process （AHP） that combines qualitative and quantitative methods evaluation ideas is used to evaluate the geological environmental bearing capacity of the mining area.The study results show that high-low distribution and spatial development regularities of the mining area are obvious，according to the bearing capacity，the mining area can be divided into excellent，medium and poor areas.The distribution map of the bearing capacity of the geological environment of the mining area is drawn，and the spatial distribution characteristics of each area are analyzed.It is concluded that the bearing capacity of Baimahongge mining area is low as a whole，and the total area of medium and poor areas is 615.73 km²，accounting for 28% of the total area of the mining area， and the area of the poor area is 79.25 km2，accounting for 3.6% of the total area of the mining area.The study results have realized the comprehensive evaluation of the bearing capacity of the geological environment of the mining area qualitatively and quantitatively，which can reflect the bearing capacity of the geological environment of the mining area more truly and effectively.Based on the above discussion results，in view of the poor bearing capacity of the mining area，some countermeasures are put forward，such as optimizing the surrounding environment of the mining area，implementing the construction of ecological rehabilitation projects and building green mines，which are of certain reference value for enhancing the bearing capacity of the geological environment of the whole mining area，realizing the sustainable development of the mining area and curbing unseasonable mining activities of the mining area.

Key words: Ecological rehabilitation of mining area, Geological environment bearing capacity, Evaluation index system, Comprehensive evaluation method, Analytic hierarchy process, Green mine