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0 <br />CD <br />O <br />r <br />V_ <br />ft <br />1 <br />I <br />Section B -B' <br />62 -foot high section <br />1.748 <br />y,1(' <br />Effective Stress Analysis <br />Failure surface forced minimum 5' into gob <br />Material: gob <br />Strength Type: Mohr - Coulomb <br />jCI <br />Unit Weight: 104 Ib /ft3 <br />y <br />y3Fl ; <br />Cohesion: 0 psf <br />Ilyt <br />Friction Angle: 30 degrees <br />Water Surface: None <br />Material: foundation <br />3 <br />Strength Type: Mohr - Coulomb <br />Unit Weight: 125 IbIft3 <br />Cohesion: 0 psf <br />Friction Angle: 30 degrees <br />ti <br />Water Surface: None <br />1 <br />I <br />