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1 <br /> 1 persistence and spacing, but in the absence of that information, RocTopple was used to perform a <br /> sensitivity analysis to identify potential configuration that would be unstable in the given <br /> geometry. <br /> 1 Results of the RocTopple analysis are shown in Figure 8. The RocTopple output indicates that the <br /> anticipated slope configuration is sensitive to failure with the current dataset. The dip of the <br /> 1 discontinuity is a key factor in the potential for toppling failure, and approximately 82% of the <br /> discontinuities would be susceptible to toppling failure. <br /> Discussion of Results <br /> 1 The kinematic evaluation indicates that the highwall in the road cut leading to the West Quarry <br /> has the potential to experience localized rock failures by planar sliding, wedge failure, and <br /> toppling. The large dataset used in this study considers a wide variety of orientations and this was <br /> an anticipated outcome of this evaluation. A key aspect not captured in this evaluation is that <br /> many of the joints have an inherent surface roughness and limited persistence, and that foliations <br /> 1 are slightly folded and not planar. This results in interlocking of blocks within the rockmass which <br /> reduces the potential of localized failure. In this manner,the kinematic evaluation is a conservative <br /> assessment of the failure potential. <br /> 1 Based on results of this evaluation, it is likely that slope stabilizing measures such as rock bolting, <br /> mesh,barriers, or catchment berms will be required. An updated kinematic analysis of the roadcut <br /> 1 and highwall based on site-specific data and discontinuity measurements is required to better <br /> understand the potential for block failure and to establish the type and level of rock stabilization <br /> required. The site-specific study should be performed when exposures at the roadcut are visible <br /> 1 after excavation begins. <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br />