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KIL D UFF4L RMR Aggregates,Inc. <br /> U N U E R a R G U N E. Rock Failure Analyses and Stabilization Report <br /> ENGINEER IN G,INC. Mid Continent Limestone Quarry <br /> K U E April 2023 field reconnaissance on the East face that indicate a tighter cluster of dip ranging from <br /> , all dipping to the The steeper CGS measurement of <br /> 44 degrees is assumed to be lower on the face where the fold is steeper.The primary discontinuities <br /> controlling rock mass stability in the slope are generally persistent and control rock mass response. <br /> After defining the discontinuity sets and the failure plane along bedding at-, analyses for <br /> each mode of potential failure were performed.The number of the discontinuity Ste reonet poles that <br /> meet the kinematic criteria of lying within the critical zone for failure are represented on Table 1 as a <br /> percentage of the total number of discontinuities. <br /> Table 1.Summary Results of Kinematic <br /> Stability Analyses for East Face - Critical <br /> Failure Poles <br /> Failure Mode Critical Percentage <br /> Pales of Pales <br /> All 4 1.33% <br /> Wedge Intersections <br /> Sets Only ❑ 0.00°% <br /> Limestone <br /> (Bedding 0 0.00% <br /> Planar Slide Only) <br /> (No Limits) Mudstone <br /> (Bedding 10 100.00% <br /> Only) <br /> Limestone <br /> Planar Slide (Bedding 0 0.00% <br /> (Lateral Only) <br /> Limits) Mudstone <br /> (Bedding 7 70.00% <br /> Only) <br /> Note: Failure mode numbers in table represent the percentage of total discontinuity <br /> poles that kinematically lie within the critical zone for failure. <br /> Based on the kinematic analyses,there is a low probability of wedge failure.The results from the <br /> wedge stability analyses indicate a very low probability of failure. <br /> The kinematic analyses corroborate field observations from the field reconnaissance that indicate the <br /> primary failure mode is planar sliding along the limestone bedding planes consisting of mudstone <br /> dipping adversely along the south-facing highwa11. Wedge sliding of rock blocks occurs when the <br /> intersection line between two discontinuities plunges in the direction of the cut face at an angle <br /> steeper than the rock friction angle but less steep than the angle of the cut slopes (Wyllie and Mah, <br /> 20044), as seen in Photo 16. Critical intersections represent wedge geometries that satisfy frictional <br /> a Wiley, D.C.and C.W.Mah,2004,Rock Slope Engineering,4"'Edition,Spoon Press, New York,NY. <br /> Page 5 <br /> 53516-STREET,SUITE 620 1 DENVER,CO 80202 1 (303)732-3692 1 WWW.KILDUFFUNDERGROUND.COM <br />