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Appendix iV <br />Material Density Cohesion Angle of Friction <br />Colluvial 130 1300 15 <br />Coal Mine Waste 82 432 32 <br />Single Failure Surface <br />Enter the X, Y, and R for the failure surface: <br />X • 193 Y = 151.0 R = 138.6 FS = 3.58 Min FS = <br />160 <br />140 <br />120 <br />100 <br />80 <br />Cover <br />60 F- ~ `~ Coal Mine Waste <br />40 ~ Co1luJka( Material <br />I • <br />Page 2 of 3 <br />