| Longyang District of Yunnan Province belongs to the southern margin of Longitudinal Valley Area of Hengduan Mountain System,The faults are crisscrossed,most of the folds are incomplete,and the mechanical properties of various structural traces are extremely complex.They are generally located in the Baoshan Lancang River fold belt of the Sanjiang fold system.Special geographical location and geological environment have resulted in steep terrain,strong weathering and denudation of rock mass,complex geological structure and frequent seismicity.With the influence of human activities,Longyang District has become one of the most serious geological hazards in Yunnan Province.In order to further study the development characteristics and distribution law of geological hazards,formulate effective prevention and control measures of geological hazards,and provide technical basis for urban development,construction and land planning and utilization.The main achievements of this paper are as follows:(1)On the basis of collecting and utilizing the existing data,the geological hazard investigation in Longyang District is carried out by means of remote sensing interpretation,field investigation,surveying and mapping.Through a series of data research,the development laws of different geological hazards in different geological environments are compared and analyzed.On the basis of considering different geological environment conditions and characteristics of different geological hazards,the existing geological hazards are analyzed.Distribution,scale and structural characteristics.(2)Studying the law,formation process and mechanism of slope deformation and destruction and debris flow development and distribution,evaluating and predicting its development trend,dividing engineering geological conditions,evaluating the susceptibility and risk zoning of geological hazards,and evaluating the potential hazards of geological hazards along important traffic lines and scenic spots.(3)In combination with disaster prevention planning,the local government will be assisted to establish a network for mass monitoring and mass prevention of geological hazards and prepare disaster prevention plans for hidden danger points of important geological hazards.Suggestions on relocation and concession of geological hazards and division of meteorological early warning zones for geological hazards are put forward.Geological hazard information system has been established to provide basis for monitoring and early warning of geological hazards,classified control projects and urban planning and construction. |
