SIMULATION ANALYSIS OF LANDSLIDE HAZARDS AREA USING THREE-DIMENSIONAL IN MAWO MOUNTAIN IN YILIANG COUNTY, YUNNAN PROVINCE

The landslide hazards area is an important basis for division of the danger zone, also is basic to carry out landslide disaster prediction and prevention work. The large discrete element numerical 3DEC model was carried out, which researches Mawo landslide hazards area. The results shows: The hazards area after Mawo landslide damaging and deformation is 105m at left of landslide(facing slope), 65m at the right of landslide, and is 345m away from landslide vertical horizontal distance. The speed monitoring data show, after the landslide sliding out, the speed of the lateral movement is small, general trend movement of landslide is downward and forward. And it shows that central of landslide have the greater speed than other parts, which make it more likely to be long-range slide. The research results would provide a theoretical basis for local disaster prevention and mitigation decisions, therefore, we should recommend that Mawodang village would relocate or construct stopped stone walls retaining measures, which locates 248～345m from gentle segment landslide downstream.