Research On Mine Geological Environment Evaluation Based On Comprehensive Index Method

Gaoping is a city rich in coal resources in Shanxi Province.People’s uncontrolled mining of coal resources for a long time brought temporary economic benefits to the Gaoping area,but also triggered a series of geological environmental problems,which brought resistance to local development.Therefore,it is important to check the influencing factors and existing problems of the Gaoping coal mining project on the geological environment,and carry out comprehensive evaluation,which has important guiding significance for the restoration of geological environment in the mining area of Gaoping Coal Mine.Based on the achievements of the predecessors and the extensive collection of research data in this area,the paper makes a comprehensive summary of the geological environment problems and the factors affecting geological environment in the mining area of Gaoping City.And use the analytic hierarchy process and ArcGIS difference analysis function to make an accurate evaluation of the geological environment impact in Gaoping area.Specifically,there are three points:(1)Select resource impact indicators and geological hazard indicators as the first-level index system for mine geological environment assessment in Gaoping City,and select 8 items such as mine area and area ratio of goaf as secondary evaluation indicators;(2)The research area of this paper is 34 coal mines in Gaoping City.The hierarchical analysis method was used to construct the geological environmental impact assessment index system of Gaoping City.Then,the comprehensive index method was used to evaluate each mining area,and the grade threshold of each mining area was obtained.The ArcGIS difference analysis function is used to partition the geological environment of Gaoping area;(3)The geological environment assessment grades of the study area are d ivided into three categories,destroying serious mining areas,destroying more serious areas,and destroying lighter areas,more severely damaged areas,and less damaged areas.The serious damage area of the mine geological environment is 27.88km~2,accounting for 6.51%of the overall area of the research area;The area with more serious environmental damage is about 58.18 km~2,accounting for 13.59%of the overall area of the research area;the lighter area of the mine geological environment is about342.12 km~2,accounting for 79.90%of the overall area of the research area.The evaluation results more accurately reflect the degree of influence of coal mining on the geological environment of the mine,provide a theoretical basis for the prevention and control of mine geological environment in Gaoping City,and put forward corresponding suggestions for the geological environment protection and restoration of Gaoping coal mine.