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West Elk Mine <br />Coal Pad Expansion Stability Analysis <br />Circular Failure Surface Search <br />Static-Seismic Acceleration = O.Og <br />Spencer Method <br />Minimum F.S. = 1.5 <br />File: padrev3 <br />Date: 9/4/97 <br />By: G. Eddy <br />Material Properties: <br />Coal Stockpile: uw = 75 pd, c = 0, phi = 40 degrees <br />Coal Pad Fill: uw = 128 pd, c = 410 psf, phi = 27 degrees <br />Foundation Sail: uw = 128 pcf, c = 410 psf, phi = 27 degrees <br />!~ <br /> <br /> <br /> <br /> <br /> <br /> <br />• 6„ - - <br />6.: <br />6.; <br />b.: <br />• 6.; <br />6.! <br />b.: <br />-~ b.! <br />5 2' <br />x <br />n2i <br />6.3: <br />6.ZE <br />6.25 <br />6.Za <br />61! <br />>.i2 <br />0.21 <br />b.20 <br />b,lo <br />6 <br />.8 <br />. <br />6.17 <br />u m to ~u w au EC IC 80 90 100 770 120 1!C IaU I;p 16C I70 .80 79u 2CC 21C 229 L'0 2er, 25p 260 210 280 290 !W <br /> Ha <br />ritonfel Dislcnce (ff) <br />,. ~.rK r« ~ <br />'. n. . <br />s. . { <br />.... L ' . <br /> <br />k ..: e..: <br />..~ .::v <br />. . <br />. ,... .u <br />