Research On Slope Stability Of Final Highwall In The Range Of E4800?E6600 In Fushun East Open-pit Mine

It is an important part of slope stability analysis in the field of slope engineering design,with the development of the open-pit mine and the expanding production,the slope instability problems become increasingly serious.Since April 2006,the Fushun East Open-pit Mine was formally build,with the continuous exploitation of resources,and it will form a deep open pit,the maximum slope height up to 369m and the slope angle up to 29°?33° after the south slope reaches the finalwall,in addition,it was against to slope stability for the weak layer under coal seam and oil shale slab.In this thesis,with the southern slope of final highwall in the range of E4800?E6600 in Fushun East Open-pit Mine as the engineering background,the slope stability of the southern slope of final highwall were studied the mechanism of landslide was revealed with the combination of field investigation,theoretical analysis,limit equilibrium theory,numerical simulation and other means.Water-draining and cutting slope were put forward for the control measures of slope deformation.The results indicate that the landslide model of south slope in Fushun Eastern Open-pit Mine is bedding-slip and cut-out,the southern slope of final highwall in the range of E4800?E6600 are instability,the stability angle of quaternary system for E5200.E6000.E6400 profile are 32°?30°?30°,the stability angle of rock slope for E5000?E5200?E6000?E6400 profile are 26°?28°?25°?25° when the measure of cutting the top of slope is adopted,the stability angles are 26°?28°?25°?25° when the measure of rich oil shale mine don' t be mined in the bottom is adopted;Providing guidance of final highwall in the range of E4800?E6600 in Fushun East Open-pit Mine,and providing reference for the similar conditions slope stability analysis and control,having important theoretical significance and guiding significance.