Spatial Characteristics Analysis of Geological Hazards in Datong Jurassic Coal Mining Area Based on 3S Technology

Taking Datong Jurassic system coal mining district as the study area, for three types of disasters including collapse, landslide and ground subsidence, with "ZY 3" satellite images and 1∶50 000 scale topographical map as data source, we adopted man-machine interactive way to interpret the geological hazard points of the area, and validated and modified results by way of field verification to obtain the information of distribution of geological hazard in the study area. There are a total of 294 geological hazards in the study area, including 18 collapses, 10 landslides and 266 ground subsidences. GIS spatial analysis function was used to analyze the relationship of geological hazards, geomorphologic factor and human activities. It turned out that the main geological hazards distributed in slope of 0 ° to 25 °, and distribution is mainly concentrated in the flat slope section; hazad points have more influence on highway and residential areas in the area and have less effect on river. Collapse, landslide and ground subsidence disasters have strong correlation on the spatial distribution.