The Mine Geological Environment Impact Assessment Of Wulie River Basin In Chengde

Chengde is one of the largest cities of mineral resources in Hebei province with abundant mineral resources.The Wulie river is the most important surface water system in the urban area of Chengde,and the largest concentration area of vanadium titanium magnetite in the northern part of the basin is distributed.With the increasing intensity of mining development in the basin,a large number of mine geological environment problems have been generated.Therefore,it is urgent to carding and analyzing the main problems of the mine geological environment in the Chengde River Valley and the evaluation of the mine geological environment,so as to protect and control the mine geological environment.This paper is based on the Chengde Wulie River Basin as the research area.First,collect basic data and field survey data of mine geological environment in the Wulie River Basin.After sorting out and analyzing the basic data and data,it is determined that the main geological environment problems of the Wulie river basin are divided into 4 major categories: mine geological disasters,soil and water pollution,topographic landform destruction and land pressure and destruction,and the present situation description and more detailed analysis of causes are carried out.According to the analysis,it is considered that the most serious mining geological environment problems in the study area are the destruction of topography,landscape,land occupation and destruction.On the basis of predecessors and their own work,this paper selects principles according to the evaluation principles and indicators formulated.Combined with the actual situation of mine development in the Wulie river basin,from the four aspects of geological environment background,mine development,mine water and soil pollution and mine geological disasters,12 indexes were selected as evaluation factors.The index system of mine geological environmental impact assessment in the Chengde Wulie River Basin is established by AHP and the weight of each evaluation factor is determined.The comprehensive index method is used as the evaluation model.Taking single mine as evaluation unit,the impact of mine geological environment in the study area is evaluated.Using mapgis as the platform,the influence of the mine geological environment on the study area is divided by GIS spatial analysis technology.The study area is divided into three categories: serious geological environment impact area,more serious area and lighter area.Among them,the area of serious geological environment in the Chengde Wulie River Basin is about 282km2,accounting for 10.93% of the total area of the study area.The area with serious geological environment impact is about 265 km2,accounting for 10.27% of the total area of the study area.The area affected by the mine geological environment is relatively small,which is about 2033km2,accounting for 78.80% of the total area of the study area.The results of the evaluation are similar to those in the actual survey.It objectively reflects the influence of mine development on the geological environment of mines.It provides a scientific basis for the protection and restoration of mine geological environment in the Wulie River Basin.It is suggested that the restoration and control of mine geological environment in the Wulie River Basin should be carried out as soon as possible.