Study On Evaluation Of Mine Geological Environment Bearing

WANBAILIN DISTRACT,in the study area is an important part of XISHAN Coalfield,the main coal energy base in Taiyuan City,it is the second largest coal mining area in the city.Because the unreasonable mining of mineral resources and the intensity of mine development exceed the maximum bearing capacity that the geological environment of the mine can bear.As a result,the frequent occurrence of geological disasters in the region.Therefore,to evaluate the bearing capacity of mine geological environment in WANBAI DISTRACT at the present stage,and to establish a close relationship between mine development(human activities of social attributes)and geological environment(natural ecological geological conditions),scientifically and reasonably delineate the division of the bearing capacity of the geological environment of the mine,It is particularly important to balance the rational development of mines and the protection of geological environment,which can provide an important basis for land planning in WANBAI DISTRACT,and play an important role in ensuring sustainable development and establishing green mines.Based on the theory of bearing capacity related to mine geological environment,this paper expounds in detail the concept and connotation of the bearing capacity of mine geological environment,and analyzes the reasons for the selection of the evaluation method in this paper.By constructing the evaluation index system of mine geological environment bearing capacity andcombining with the previous investigation and research results of WANBAILIN DISTRACT,the natural geography,which determines the bearing state of mine geological environment,Basic geology and mine development and geological disasters and social economy which mainly induce mine geological environment problems collect the evaluation factors that affect the bearing capacity of mine geological environment.Using AHP decision method,the three-level hierarchical structure model is established,and the index weight is calculated accurately by using yaahp software as a tool.Based on the comprehensive mathematical model of different factors of ArcGIS,the spatial weighted summation of many influencing factors of bearing capacity is calculated.By multiplying the grid by the specified weight and calculating the bearing capacity together,the results of five grades of bearing capacity of mine geological environment in WANBAILIN DISTRACT are obtained,which are excellent,good,medium,poor and extreme difference.The main research results of this paper are as follows:1.The factors affecting bearing capacity are analyzed from two aspects of natural ecological geological conditions and human activities of social attributes in WANBAILIN DISTRACT,and the following are summarized:Vegetation coverage,annual rainfall and water system distribution;Geomorphology,slope,lithology,geological structure;Mining density,hidden danger degree of ground disaster,main mining mode;a total of 12 evaluation indexes for population density and land use types,In accordance with the actual situation,it is suitable for the classification type and classification standard of the numerical value in the study area.2.Three levels of evaluation system of mine geological environment bearing capacity are established,and AHP method is adopted.With the help of yaahp software,the weight of each index is calculated,and the thematic map of the index is obtained according to the remote sensing image data and theregional ground disaster survey data,and the hierarchical assignment is carried out and the grid vector conversion is carried out.3.The mathematical model of multi-factor comprehensive evaluation based on ArcGIS is established,and the bearing capacity of mine geological environment is calculated,and the bearing capacity of mine geological environment is classified according to the natural intermittent weight classification,and the bearing capacity of mine geological environment in Wanbai forest area is excellent,good,medium and poor.The spatial characteristics are discussed,the distribution law of bearing capacity is analyzed,and the prevention and control measures are put forward.4.the results show that the proportion of the area with excellent bearing capacity,good,poor and extremely poor area in the total area of the study area is8.15%,28.63%,15.01%,28.35% and 19.86%,respectively.The area with poor and extremely poor bearing capacity accounts for nearly half of the total area of the study area,and is concentrated in the areas affected by underground mining disturbance in Wangfeng Township,Guandi,du Erping,Ximing Township and Huakatou Street.For the areas with poor bearing capacity,we should strengthen the investigation of illegal development of mines,limit the number of mines,focus on the treatment,and strengthen the degree of intensive utilization in concentrated areas.To establish a dynamic tracking and supervision mechanism to reclaim the closed goaf and restore the seriously damaged topography and landform,and to formulate punishment and incentive measures to develop the green economy and improve the recycling rate.