Study On Risk Assessment And Control Measures Of Geological Hazards

Yushen mining area is located between the southwest of Shenmu and the northeast of Yuyang in Shaanxi Province.The geological environment is fragile,human engineering activities high strength,in which more serious is coal mining.A series of environmental problems are triggered by ground subsidence and other geological,posing a threat to people's life and property safety.As the basis of disaster prevention and mitigation,the risk assessment of geological hazards is particularly important.Yushen mining area is the research object,thirough the collection of the geological environment and geological hazards and social economic data.The development characteristics of geological hazards are analyzed,the distribution of geological disasters are summarized,the geological hazard and vulnerability assessment index system are established,the risk assessment of geological hazards are realized by using the risk matrix.So the following are:The geological disasters are mainly caused by land subsidence and collapse,and the development of geological hazards is characterized by concentration,sudden and chain.Among them,the ground subsidence is mainly distributed in the coal mining area,and the collapse is mainly distributed in the coal mining area,which is characterized by the large intensity of human engineering activities,the vertical and horizontal slope,the relatively large slope,and the large thickness of the accumulation layer.In this paper,using the analytic hierarchy process(AHP),the geological hazard risk and vulnerability assessment of the MapGis platforarm are divided into three zones:high,medium and low.Risk assessment of selected topography,hazard point,soil type,fracture degree,rainfall and human engineering activities,the strength of 6 factors as the risk assessment factors,regionalization of the high risk areas mainly distributed in the net shape of each township irregular area is 1340 km2,accounting for 24.47%,mainly in the danger zone the distribution in the mining area of the eastern area of 1258 km2,accounting for 22.97%,low risk areas distributed in the study area of the western area is 2878 kITm2,accounting for 52.56%.The vulnerability evaluation was based on population density,GDP density and road density as the evaluation index.The results showed that the high vulnerability area was distributed in the East and south of the study area,with an area of 236 km2,accounting for about 4.31%.The vulnerable area is mainly distributed in the northeast and south of the mining area,the area is 1291 m2,accounting for 23.58%.The area of low vulnerability is distributed in most areas of the study area,the area is 3949 km2,accounting for 72.11%.The risk factors and vulnerability factors,the risk matrix of Yushen mining area,risk assessment,evaluation results,and high risk area is 480 km2,accounting for 8.77%,in the area of risk area of 1487 km2,accounting for 27.15%,low risk area is 3509 km2,accounting for 64.08%.According to the results of geological hazard risk zoning in the study area,the corresponding countermeasures are put forward according to the characteristics of various geological disasters.Overall,this paper studies the geological environment on the other regions of the coal mine recovery has certain guiding significance to enrich the research of governance,evaluation and control of geological disaster risk in coal mine,has a certain promotion effect and demonstration significance.