STUDY ON SPATIAL DISTRIBUTION OF GEOLOGICAL DISASTERS IN MIDDLE PART OF AILAO MOUNTAIN:A CASE OF YUANJIANG COUNTY

Yuanjiang County is located in the middle of the Ailaoshan fold belt and Red River fault, The geological structure is complex and the engineering geological conditions are fragile.It is one of the most developed areas of geological disasters in Yunnan Province.The authors elaborate the distribution law of geological disasters from the space side.(1)The difference is obviously of spatial distribution of geological disasters in the study area.The characteristics of spatial distribution are not uniform.The concentrated distribution areas are on both sides of the Red River.(2)The geological disasters are mostly developed in the terrains of linear and stepped slope types, slope dip directions of 45°~135°, slope dip angles of 20°~50°, and elevation of l500 to 2000 m.(3)The number of geological disasters is the largest in the Ailao Mountain area of the western part to study area.The density of geological disasters is the largest in the south of the Red River.(4)The control effect of geological disasters is obvious the main control structure in the study area.The geological disasters are very developed in the Yuanjiang county.The findings can provide geological basis and reference for disaster in the junction of the fault zone or at the change of main rupture.The study on the spatial distribution of prevention and mitigation can guide the local geological disaster management and relocation site effectively.