Study On Stability Analysis And Treatment Of A High Rock Slope

This paper deals with the stability analysis and treatment engineering research of a high rock slope in JingMen city.On the basis of extensive literature review at home and abroad,this paper summarizes the research results of stability analysis and prevention engineering measures of high rock slope.Based on the existing mine basic data and field investigation,the engineering geological conditions,basic characteristics and bad engineering geological problems of the high rock slope to be treated are identified,and the current stability status and possible deformation and failure mode of the slope are analyzed.FLAC3 D software was used to simulate the distribution of stress field and displacement field of the slope under dead weight,and the safety coefficient of the overall stability of the slope was obtained.The analysis results showed that the overall stability of the slope was basically stable under dead weight.The local stability of the slope is analyzed and evaluated by using the method of planar projection and limit equilibrium.The analysis results show that under the adverse combination of J1,J2 and J3 structural surface and rock layer surface,the local dangerous rock mass and block produced at the step slope position may collapse and slide,and the rockfall geological disaster may be formed at the same time.The results of FLAC3 D numerical simulation are basically consistent with the results of planar projection and limit equilibrium analysis and macroscopic geological survey.Comprehensive consideration to the overall stability of the slope governance situation,local bad engineering geological problems and harm,such as object and consequences in accordance with the "feasible technology,reasonable economy,green environmental protection,convenience of construction" principle,for the prevention and control of slope engineering plan has carried on the comprehensive analysis and research,put forward the "Critical mass removal+planting wall+active protection net+bolt support+drainage ditch+ecological greening+monitoring" of the comprehensive control project plan,as well as the measures to prevent and control the project layout andstructure design,using FLAC3 D to simulate the slope under the bolt support the distribution of stress field,displacement field,The safety factor of slope under supporting condition is obtained.By comparing the calculated results with the self-weight condition,it can be seen that the slope stability is improved under the bolt support,and it changes from basic stability to stable state,which further indicates that the above bolt support scheme is feasible.Through the implementation of this treatment scheme,not only the bad engineering geological problems existing in the part of the rocky high slope can be effectively solved to prevent sudden geological disasters,but also the ecological vegetation of the exposed rocky high slope can be restored.