Annlysis On Landslide Deformation Monitoring And Landslide Morphology Of Gongchangling Stope

The stability of open-pit mine slope can influence the safety of mine production directly.Therefore,it is very important to resarch the deformation characteristics and slip morphology of the landslide.At present,the analysis of the law of deformation about landslide displacement is mainly based on the prediction of monitoring displacement.Although the research purpose can be achieved,it is difficult to fully reflect the formation,development and destroy process of sliding surface.This paper is based on the Gongchangling open stope landslide as the research object.Combined with the field survey,the landslide deformation monitoring and the numerical simulation method,the deformation characteristics,trend of displacement and displacement are researched.In addition,simulation of the particle flow code is used to simulate the development process of landslide sliding,which not only makes up for the deficiency of the monitoring,but also the morphology of landslide can be understood more intuitively.The main research work and results are as follows:(1)By taking targeted samples of the exposed surface in the sliding band and combining with indoor physical tests,the macroscopic parameters for the particle flow landslide model was provided.(2)The landslide was investigated on the spot,and the deformation of surface displacement was monitored by measuring robot(TM30)and3D laser scanner(i-site8820).Therefore,the characteristics,sliding range,sliding zone and deformation trend of the landslide are resarched.According to investigation on the spot,the landslide can be regarded as a composite landslide with the main thrust type,and the new landslide was characterized by a thick landslide mass and a steep back wall.According to TM30 monitoring data,the deformation amount,azimuth Angle,vector Angle and deformation rate of the four pile positions were analyzed,and the deformation trend characteristics of the landslide was obtained.According to the point cloud data of three-dimensional laser scanner,the maximum uplift deformation and maximum settlement deformation of the landslide were obtained,and the development process of the new landslide was also obtained.The landslide was divided into five regions,which provides a basis for the establishment of landslide model of the particle flow code.(3)Based on the physical experiment of sliding zone soil,the numerical triaxial test was carried out by using the particle flow code(PFC)and the microscopic parameter calibration was carried out by using the single factor variable method.Therefore,the parameters of the linear bond model was established and the numerical triaxial servo mechanism was also studied at the same time.According to the previous work,the landslide was divided into five areas,bychoosing three typical landslide section,and using the CAD layer command makes landslide model divided into the grid and using the geometry command and the import command to restructure the landslide model in the particle flow code.Therefore,the division of the grid particle flow landslide model was established,and the particle flow landslide model could qualitativly show the landslide deformation and failure process of development.