Stability Control Technology of the Complex Rock Slope Considering Joint Fissures
The joint fissure is one of the important factors that affect the stability of slopes.In order to study the stability of rock slopes with joint fissures,the supporting project of Zijingxuan slope in Hengshan County is taken as the research background,and the stability of the slopes is evaluated using qualitative and quantitative analysis methods.The qualitative analysis reveals that there are multiple groups of unfavourable rock stratum structural surfaces,joint surfaces,and combined intersection lines in the slope,and the stability is the worst along the combinational intersecting lines of the YC5-J3,YC6-J5,and YC9-J7.The quantitative analysis shows that the slope is in an unstable to basically stable state under the condition of the self-weight and rainstorm before supporting.For this reason,a support scheme is proposed,which is combined with the lattice anchor(cable)retaining wall,hanging net sprayed concrete,grouting steel floral tube,and slope foot slurry block stone retaining wall,supplemented by the drainage project and monitoring measures.Finally,the stability coefficient of the slope after support is calculated by the Lizheng geotechnical software to meet the specification requirements by specifying the potential slip surface and automatically searching for the most dangerous slip surface.The stability of rock slopes with joint fissures can be effectively controlled by this support scheme,and technical support for similar mine slope support designs can be provided.
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