Application Of 3S Technology In Landslide Monitoring Of Fushun West Open-pit Mine

China is one of the most serious landslides in the world.Many cities are threatened by landslide hazards,causing an average annual economic loss of 15 billion ~23 billion yuan.Therefore,the study of landslide is of great significance.Landslide research is based on monitoring,analysis as a means,landslide prediction and stability evaluation as the purpose.The causes and causes of landslides are very complicated,and the process is complex and irreversible,so it is difficult to monitor landslides.The rapid development of 3S technology has provided new tools and means for landslide monitoring and analysis.Using 3S technology to monitor landslides and obtain multi-source monitoring data,we can grasp the temporal and spatial evolution rules of landslide and provide scientific decision-making basis for disaster prevention and mitigation work of landslide.Based on the deformation monitoring project of Lampang landslide in Fushun West open pit mine,this paper makes full use of RS,GPS and GIS to monitor the deformation of Lampang landslide in Fushun West open pit mine.The geological and geomorphologic data and surrounding engineering activities,deformation monitoring data and image data of Fushun West open pit mine have been integrated for years.Using RS technology to get full coverage of image data,achieve macro dynamic monitoring;use GPS technology to carry out high-precision monitoring of important deformation areas;use GIS to manage RS and GPS data,carry out comprehensive analysis of data space,and dig deep slope information from multiple angles,so as to provide technical support for landslide prevention and control.The main contents and achievements of this paper are as follows:1.RS technology in landslide monitoring.Using unmanned aerial vehicle technology to obtain continuous remote sensing image data for many years,processing image data and obtaining DOM data.Based on DOM data and combined with field investigation data,the landslide boundary is determined.Displacement analysis of the same name points of DOM data in different years is conducted to obtain the displacement and direction of landslide deformation,and to master the deformation rules and locations of the landslide,so as to provide a basis for the layout of GPS monitoring network.2.GPS technology in landslide monitoring.Based on the RS monitoring results and geological exploration data,the GPS monitoring network is set up to directly acquire the plane coordinates and elevation information of the monitoring points,and the GPS data are analyzed and processed to obtain the deformation displacement,speed and direction of the monitoring points.Through the analysis of the monitoring data,we can grasp the spatial distribution and the time evolution rule of the landslide deformation.3.GIS technology in landslide monitoring.The landslide hazard database is established,and the monitoring data and geological exploration data obtained by RS and GPS are comprehensively managed.On this basis,the DEM data of landslide surface are built as the foundation of spatial analysis,and the important parameters such as slope,thickness and volume of landslide are calculated,and the three-dimensional model of landslide is constructed to analyze the spatial migration characteristics of landslide.Based on the application of 3S technology in landslide monitoring,the important features such as topography,topography,area,volume,deformation rate and displacement,uplift settlement,rain collecting area,filling and excavation are obtained.At different stages of landslide monitoring,3S technology can combine its own advantages to carry out continuous monitoring of different scales,conduct comparative analysis of the data before and after the landslide,and grasp the temporal and spatial evolution rules of the landslide in an all-round way,so as to provide technical support for timely warning and scientific disaster reduction.