Stability analysis and characteristics of deformation failure of an ancient landslide at main plant section of industrial ground on Hecaogou colliery

Engineering construction caused reactivation of the ancient landslide at main plant section of industrial ground at Hecaogou colliery,in this paper,combined with field investigation and measurements,drilling,exploration trench,deformation monitoring,laboratory experiments and numerical calculation,analyzed the reactivation reasons and deformation failure of the ancient landslide.By improved numerical calculations analysis,the ancient landslides in natural conditions in a steady state,reactivation of the ancient landslide use of "cutting head pressure foot" measures,the stability to meet the safety requirements,which the ancient landslide governance theoretical basis for design raised.At the same time,the measure can be saving investment on the projects,shorten the construction period,with good economic benefits.