Evaluation system and application of ecological restoration benefit in mining area based on AHP

Song Haibin; Wu Fuqing; Gu Bingyan

Abstract：Ecological restoration in mining areas is an important means to improve the quality of ecological environment.In recent years,mine ecological restoration has been booming,but formalism that violates the law of nature occurs from time to time.According to the relevant literature and field investigation of mining areas,combined with the characteristics of ecological restoration benefits of mining areas,this paper constructs the evaluation system of ecological restoration benefits of mining areas.The system includes three dimensions of ecological,economic and social benefits,six criteria and 18 indicators.The analytic Hierarchy process(AHP)was used to determine the weights of a total of 27 indicators.According to the weight proportion ranking,the top five indicators were organic matter content,soil water content,soil erosion rate,surface water quality and agricultural land area proportion.This paper takes the ecological restoration project of the subsidence area of the coal mine in Jiguan District of Jixi City as an example,and evaluates the ecological restoration benefits.After the ecological restoration of the mining subsiding area in Jiguan District,Jixi City,the ecosystem structure of the mining area recovered well.The ecosystem in the mining area is well improved,which has a positive impact on the surrounding environment.Regional economic benefits have a good positive impact;the social benefit is better after repair.