Risk Assessment And Management Of Landslide Geohazards Induced By Underground Mining

China is a region with frequent geological disasters.Statistics show that the occurrence of geological disasters is largely related to human activities.Mining as the main factor inducing geological disasters caused by human engineering activities,the geological disasters formed have the characteristics of large destructive power,wide range of impact,and large economic losses,especially the most serious geological disasters caused by underground mining,resulting in many disasters accident.Past experience shows that for the prevention and control of geological disasters can not be exhaustive,proper geological disaster risk management methods should be adopted,especially for the mine has not yet a set of systematic management methods for mine geological disasters,so it is very important to realize risk management research of mine collapse and geological disasters.This paper analyzes and discusses the current status of early identification,risk assessment,and risk management of geological disasters both at home and abroad,analyzes key technologies and difficulties,and proposes a risk management system for the geological disasters of the collapsing and sliding of the mines in light of the characteristics of the collapsing and sliding geological disasters and risk management requirements.It mainly includes the early identification methods of mine geological disaster risk sources,risk assessment methods(risk range,instability probability,etc.),vulnerability assessment methods,risk assessment methods,and the whole process management system of geological disasters based on the whole life cycle of mines.The risk assessment and management of Deformation Body in Miluo Coal Mine,Guizhou Province is a method validation case.The main research results obtained are as follows:(1)Establish a method for the early identification of mine geological hazards by combining quantitative and qualitative data fusion of multiple sources.Perfected the qualitative identification index system for the geological disasters of the collapsing and sliding of the mines: high and steep terrain,favorable free surface,steep joints,structural deformation,front or back slope mining,large mined area,long emptying history,?hard "Softer" slope structure;proposes a multi-source data fusion technology for early identification of geological disasters in collapsing and sliding mines: census(regional geological environment,InSAR technology)? detailed investigation(Lidar,drone aerial photography,optical remote sensing)? verification(Field survey technology).(2)A method for determining the impact range of the collapse-induced geological disasters is proposed.Based on the statistical analysis of 64 historical landslide geological disaster data points,the empirical formula of landslide movement distance was determined;and the method for determining the influence range of geological disaster instability in combination with empirical formulae,physical simulation,and numerical simulation was determined.(4)Using the ?Maximum Risk Criterion? method to analyze the acceptable risk level of geological disasters in China and the acceptable risk level of coal mines in China,and finally determine the upper limit value of acceptable risk criteria for mine geological disasters in China(tolerable risk line risk value)for 1E-05,the lower limit of acceptable risk criteria(risk of acceptable risk line)is 1E-07.(5)A comprehensive risk management system based on the whole life cycle of the geological hazards of the mine is proposed that comprehensively considers the risk management of the whole life cycle of the mine,the risk management of the whole process of geological disasters,and the related departments of geological disaster management.(6)Put forward the concept of constructing the integrated data risk management platform for geological disaster prevention and rescue.To build a geological disaster risk management information application service system with coordination among various departments,process optimization,and standards,and provide global and rapid information service support for the prevention and management of geological disasters.(7)Taking Miluo Coal Mine Lateral Deformation in Guizhou Province as an example,based on the above-mentioned geological disaster risk assessment and management methods for risk assessment and management in the case area,the results show that the 1# slope body in the case area is the most deformed and destroyed.Obviously,the main focus is on the slope body,looking for its potential 3 landslides,of which the 1-1 landslide risk is the highest,resulting in the highest geological hazard risk,threatening 46 people and causing a potential economic loss of 49,617,600 yuan.Minola Coal Mine is currently in the closed mine stage.The main work is geological disaster monitoring and management.The geological disaster risk management suggestions for the mining area mainly include geological disaster prevention and control divisions,monitoring and early warning suggestions,avoidance relocation suggestions and geological disaster emergency drill recommendations and the establishment of geological disaster insurance recommendation system.