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Direct Shear Test <br />ASTM: D3080 Job No�age B -17 of�2112 <br />Project: West Elk Mine PR -2 Conveyor and Prep Plant - # 06261004 <br />Boring No.: SB09 -11 Sample No. Depth: 7.5 -9.5 Test Date: 8/27/2009 <br />Location: Sample Type: SS Date Reported] 9/2/2009 <br />Type: Mixture of Coal and Mineral Soil Shear Rate <br />0.00315 (in /min) <br />Remarks: Specimen reconstituted to given density at as received moisture content using - #10 material; <br />Inundated after applying normal load; Allowed to consolidate 1 hour.; Sheared to given displacements at constant Liquid Limit: <br />rate of 0.00315' /min.. <br />Plastic Limit: <br />Plasticity Index: <br />Specific Gravitv: 1.66 <br />0; <br />-5 <br />-10 <br />c <br />0 <br />° -15 <br />0 <br />N <br />N <br />d <br />Y -20 <br />U <br />L <br />-25 <br />d <br />rn <br />c <br />U -30 <br />-35 <br />-40 <br />2.5 <br />2 <br />N 1.5 <br />F <br />N <br />V! <br />m <br />N <br />iu 1 <br />L <br />N <br />0.5 <br />00 <br />0 <br />0.1 0.2 0.3 <br />0.1 0.2 0.3 <br />Shear Displacement (inch) <br />Failure Criterion: <br />Max Shear Stress <br />Initial <br />X <br />2.5 <br />ILL 2 <br />co <br />H <br />N <br />2 <br />01.5 <br />to <br />m <br />L <br />N <br />1 <br />0.5 <br />0 <br />0.1 0 0.5 <br />1 1.5 2 2.5 3 <br />Normal Stress (TSF) <br />OIL <br />9301 Bryant Ave. South, Suite 107 NGINEERING Bloomington, Minnesota 55420 -3436 <br />TESTING, INC. <br />Diameter (In.) <br />2.50 <br />2.50 <br />2.50 <br />Thickness In <br />0.82 <br />0.82 <br />0.82 <br />Water Content ( %) <br />10.9 <br />10.9 <br />10.9 <br />Dry Density (pcf) <br />53.8 <br />53.8 <br />53.8 <br />Before Shear <br />Thickness (In.) <br />0.64 <br />0.60 <br />0.58 <br />Water Content ( %) <br />31.0 <br />1 25.1 <br />21.8 <br />Dry Density (pcf) <br />68.4 <br />73.2 <br />76.0 <br />Normal Stress <br />0.75 <br />1.50 <br />3.00 <br />Shear Stress <br />0.75 <br />1.37 <br />2.18 <br />"These tests are for informational purposes only and must be reviewed by a <br />qualified professional engineer to verify that the test parameters shown are <br />appropriate for any particular design." <br />Peak Conditions <br />At Given Shear Disp. Of: 0.3 <br />Friction Angle: 31.9 deg. <br />Apparent 0.342 TSF <br />Cohesion <br />Friction Angle: �= 31.8 deg. <br />Apparent 0.248 TSF <br />Cohesion <br />3 <br />2.5 <br />ILL 2 <br />co <br />H <br />N <br />2 <br />01.5 <br />to <br />m <br />L <br />N <br />1 <br />0.5 <br />0 <br />0.1 0 0.5 <br />1 1.5 2 2.5 3 <br />Normal Stress (TSF) <br />OIL <br />9301 Bryant Ave. South, Suite 107 NGINEERING Bloomington, Minnesota 55420 -3436 <br />TESTING, INC. <br />