Development law of accumulation landslide in LUE YANG of Shanxi province in China

Accumulation landslide is one of the most Geological disasters in LUE YANG of Shanxi Province in China. On the basis of Accumulation landslide in LUE YANG, its development laws are studied by Site investigation and Theoretical analysis, and the conclusions are as follows: (1) The slope gradient lead to develop accumulation landslide is 8 similar to 60 degrees, with average gradient of 35 degrees and concentrate in 8 degrees similar to 40 degrees; it often exist in the slope which the height is 16 similar to 60 m. Most of them are mainly distributed in the low-erosion mountains and the middle-erosion mountains. (2) Accumulation landslide occurred in cycles. Cyclical performance in two ways, one is it performance in different years, with a significant increase in frequency of geological disaster every few years. Secondly, accumulation landslide occurred in May to August each year. It mainly concentrated in the north area in LUE YANG city. (3) Accumulation landslide were concentrated and developed in the sunny slopes, also a small amount of development in shady slopes of LUE YANG city; (4) Accumulation landslide disasters happened with a chain nature; always with relevant to the intensity of human engineering activities; so they have characters of high-dimensionality, complexity, randomness and "immunity".