Landslide disaster and its prevention and control technology in coal mining area

Because of special geological structure, coal mining area is one of areas with the most serious landslide disaster in China. The paper listed some living examples of landslide disasters in open pit slope, subsidence area of gob and factory district, analyzed the mechanism and features of the common loess landslide, accumulated layer landslide, bedrock bedding landslide and insequent landslide in coal mining area. The special structure of strata and slope is the geological foundation of landslide, groundwater is an important influencing factor for landslide, unscientific human engineering activities are the inducement for landslide. For prevention and control of landslide disaster, it is necessary to deepen geological works during selection of lines, plants and site, to find out the scope and nature of old and new landslides, to assess the stability of landslides by combining engineering geology and mechanical calculation so as to put forward recommendation about prevention and control measures. At the same time, engineering measures such as water drainage, weight reduction, back pressure, supporting and retaining, commonly adopted in control of landslide in China, and problems needed to be deeply studied in future were introduced.