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• WHEXSIopeEvaluation AdrianBrown <br />The frictional chazacteristics of discontinuities (joints and faults) in the WHEX rocks have been <br />evaluated by laboratory testing of the granitic materials. To date, a total of 12 direct shear tests of joints <br />and joint infill in these materials have been performed. The results of all tests aze presented in Table 5. <br />Table 5. Mohr-Coulomb Shear Strength Test Results <br />Material in Discontinue Effective Stress Friction de Effective Stress Cohesion si <br />Volcanics honolite, breccia 31 40 <br />Granites anite, schist, eiss 29 55 <br />Fault Gou a anitic host rock 40 0 <br />Based on these results, discontinuities in each rock material exhibit approximately the same shear <br />strength behavior in a 700 foot slope, with joints in the granitic rock being somewhat stronger, and the <br />granitic fault gouge being somewhat weaker than equivalent joints in the volcanics. <br />• <br />C7 <br />Report 1385L.200309017 7 <br />