Study On Comprehensive Evaluation Of Geological Environment In Pingmei No.2 Mine Based On AHP-fuzzy Comprehensive Evaluation Method

Coal resources are the highest proportion of available mineral resources in China.However,mining of coal resources often causes severe damage to the geological environment of the mine,and severely affects the mining area and the surrounding environment of the mining area.Strengthening the protection and restoration of mining geology once again listed by the country as a priority work.Comprehensive evaluation of the mine geological environment in the area where the coal mine is located is conducive to more scientific and effective mine geological environmental protection and restoration management.Through the methods of data collection,data collation and field survey,a clearer understanding of the current status of the mine geological environment of the Pingmei No.2 Mine in the research area has been made.The study found that mining geological environmental problems such as large-scale goaf collapse caused by mining activities,the development of a large number of ground fissures around the collapse pits,and the destruction of the aquifer structure in the research area were found in the study area.In this paper,three aspects of geological disasters,geological environment and water and soil resources are taken as the main factors for comprehensive evaluation and research.Ten reasonable evaluation indexes were selected from the three main factors to establish a comprehensive evaluation system of the geological environment of the mine,and the researching area was divided into 75 units.The analytic hierarchy process and fuzzy comprehensive evaluation method were used to calculate the evaluation value of each cell.According to the scoring standards corresponding to different methods,75 cells were divided.Finally,the results of the two evaluation methods are compared and combined,and the conclusion is drawn and the study area is divided into 4 areas with severe geological environment impact(Total area720.3844hm~2,accounting for about 75.81%of the study area)and 1 area with less geological environment impact(Total area 229.8775hm~2,accounting for approximately24.19%of the study area).