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75GG40 1-03-OS 70:52 <br />1250 <br />1000 <br />--. <br />a~ 750 <br />N <br />X <br />Q 500 <br />r <br />250 <br />0 <br />0 <br />75 % COAL GOB, 2:1 AND 4:1 SLOPE <br />10 most critical surfaces, MINIMUM BISHOP FOS = 1.560 <br />Figure D <br />250 500 750 1000 1250 1500 1750 2000 <br />X-AXIS (feet) <br />