Study On Formation Mechanism And Drainage Scheme Of Cui Mu Coal Mine Industrial Square Landslide Induced By Long-term Seepage

Landslide has become the most serious disaster in geological disasters.China is one of the most serious landslide disasters in the world.In this paper,Linyou County in Baoji city of Shanxi province Cui mu coal mine industrial square landslide as the research object,based on the geological conditions,characteristics and mechanism of deformation and failure of landslide,the long-term seepage mechanism of comprehensive system research,the main achievements include:(1)The landslide in the industrial square of Cui mu coal mine is a deep,complex type and super large landslide.According to the historical level of the landslide can be divided into ancient landslide,landslide and landslide secondary.The ancient landslide is formed by the special stratum condition,and the new landslide causes the underground water level to rise on the surface water for a long time,which leads to the partial revival of the ancient landslide.(2)Establish hydrogeological model,using the seep module in GEO Studio software,the transient unsaturated seepage numerical simulation of long-term seepage induced landslide formation process,the different periods of pore water pressure contours,the simulation results and the actual situation of the landslide is basically the same.(3)Limit equilibrium method of unsaturated shear strength based on considering the relationship between the underground water level change and landslide soil matric suction distribution,and use the Morgenstern-Price method to analyze the stability of landslide geological model.The results show that the stability analysis of landslide "dump stability period" during this period,the slope stability of the landslide is the formation period of the fastest decline.(4)In view of the large buried depth of the sliding surface of the landslide,the author puts forward two sets of underground drainage schemes:"well point pumping" and "drainage blind hole".The results show that the "wells pumping"and "blind drainage hole" scheme can quickly reduce the slope of underground water level,can significantly reduce the pore water pressure,the calculation of landslide stability with the seepage simulation,it shows that the landslide is in a stable state,verify the effectiveness of the two sets of underground drainage scheme.