关键词: 滑坡, 断裂, 地质灾害, 云南鲁甸

Abstract: Ludian County, located in the northeast of Yunnan, is one of the counties that is suffered with highly frequent geological hazards in China and there were 248 potential geological hazards in the county area before 2014. However, all kinds of potential geological hazard points increased to 671 after the "8.03" Ludian Ms6.5 earthquake in 2014, including 382 landslides and 244 collapses, accounting for 93.3% of the total geological disasters. Based on the survey of 1:50000 standard sheet in the region, the distribution characteristics and the geological settings of the hazards were identified: (1)The high and steep slope banks of the Niulanjiang River and its tributaries provide topographic conditions for the development of geological hazards; (2)The synclines(consequent) slope and cataclastic, scattered structure rock mass are the material foundation of geological disaster development; (3)The fracture and syncline structure of north and northeast directions control the development and distribution of geological hazards; (4) Mudstone, shale, mud sandstone and other vulnerable strata and weathering interface have control effect on landslides;(5)The weathering degree of rock mass, karst effect and structural surface development degree also have control effect on the landslide development.

Key words: landslide, fracture, geological hazard, Ludian County