Evaluation Of Geological Hazard Temple Town Taibai County, Shaanxi Province Goldfields

Zhen’an County’s Taibai Temple gold fields is located in the hinterland of Qinling Mountain, due to mining damage and unreasonable use of land in this year, resulting in some issues such as geological disasters including landslide, collapse, debris flow; land occupation and destruction, underground water pollution, destruction of ecological environment, which seriously restricted the sustainable development of the local economy and society, affected people’s life and property security. Therefore, establishing effective geological disaster risk assessment system is of great significance for the prevention of mining area and the protection of the ecological environment.The thesis is based on the adequately collection and study for assessment work of the hazard resulting from geological disaster, this assessment work is done by a large number of experts and scholars.This thesis focuses on the geological disaster type of the Zhen’an County’s Taibai Temple gold fields,through field investigation and survey,use analytical hierarchy process and expert evaluation method,bind up with the GIS to analysis and make a study of the geological hazards and it’s dangerousness of mining aera,as described in the following subsections:1、Throught the detailed field survey and the indoor test,we find out the i nternal and external conditions,such as Topography, meteorology and hydrolog y, formation lithology, geological structure, mineral mining situation, that influence disaster formation, distribution and evolution in Zhenan County Taibai Temple gold mine;detect the Geological disaster type, number, and distribution,include t he3collapses,3landslides and4debris flow disaster, a total of10geological di sasters (hidden) in Taibai Temple mining area.2、For different types of the disaster,This thesis classify various kinds of ge ological disasters. Through analysis of the main influence factors and predisposin-g factors, forming conditions of the geological disasters, development characteris-tics and distribution rule in Taibai Temple. The results show that:the disaster ma-inly concentrated in the place where human activities relatively stronger, rivers and along the road area,ect.The geological environmental factors that influence th e geological hazard occurrence,include topography, lithology,hydrology and clim-a te, vegetation and fracture and other categories; the major predisposing factor is r ainfall, slope, excavation slope engineering,mining waste slag and tailings stackin-g and other human activities. 3、In fully discussed the foundation of geological hazard risk assessment th-eory, combined with the main factors affecting the various types of geological di-sasters in mining area. Firstly we adopts the expert on-site evaluation to analysis the dangerous of mining disaster; Secondly, analyzed and summarized the various factors that affect the hazard, established the hierarchical structure of the evaluati-on index system.On the basis,Using analytic hierarchy process to establish the mining disaster evaluation mathematics model to conduct a comprehensive asses-sment of mine geological disasters in all. Finally, the analytic investigation result and expert evaluation results are verified, the geological hazard in this area and the results are more accurate. According to the evaluation results the study area can be divided into two large evaluation unit.on the basis of the geological disaster risk severity and the size of the risk level in the studied area partition, further divided into it five areas. There is one area has the the big risk accounting for13.6%of the study area, there are two areas has the the middle risk accounting for16.5%, the study area has two section of the small risk, accounting for14.6%of the area in the study area.4、According to the result of the main geological disaster risk assessment in the study area and mine geological environment status, we put forward reasonable prevention and monitoring project suggestions for the collapse in the area of landslide and debris flow disasters, which mainly adopts block row block and the combination of the dynamic monitoring method, providing evidence for the protection and management of detailed scheme, to ensure the safety of mining activities Effectively and people’s life and property safety.