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TYPICAL SLOPE SECTION <br />APPROXIMATE SCALE <br />ill = 501 <br />Permit N ber <br />Class: OPeffnd <br />Section/Exhibit: ................................... <br />Gass-- O Revision i <br />iTypefSeR. _.___ ._- _____.___- _.___.___._._._._! <br />Class: epoft �OC Hyd- Genem / n <br />C7Appliwflw (Coal only) O Bon Enforcement i - -'on ly/ fir <br />PA = 4py02 <br />PP = h%PY02 <br />ASSUMPTIONS K _ 1 —sin <br />A t +sln m <br />1. SHEAR STRENGTH PARAMETERS �1 = 400, C1 = 0. 1 <br />K = i +sin <br />Z. NO PORE PRESSURES WERE CONSIDERED IN THIS P 1 —sin <br />ANALYSIS. <br />3. THIS ANALYSIS HAS BEEN PERFORMED FOR AVERAGE <br />SLOPE CONDITIONS. LOCALLY OVERSTEEPENEO <br />SLOPE PORTIONS WOULD EXHIBIT LOWER RESULTS <br />THAN PRESENTED HEREON. <br />MODIFIED "INFINITE SLOPE" ANALYSIS <br />FACTOR OF SAFETY: <br />FS = STRENGTH = S <br />STRESS T +R <br />7DL cnsZ i tan 0' + 5 (KP —KA) YDZ <br />YDL cos i (sin + K cas i) +CT 0 <br />FOR a= 0: <br />+ <br />cos i tan f K KA <br />FS = sin i + K cos t 2 cos i (sin i + K cos i) D/L <br />STRENGTH: <br />S = N tan # + PP —PA <br />N =YDL cost i <br />STRESS: <br />T = YDL cos i (sin i + K cos i) <br />R =o 0 <br />WHERE K = SEISMIC COEFFICIENT <br />ASSUMED TO ACT IN A HORIZONTAL <br />DIRECTION. <br />WHERE CF= AVERAGE STRESS ACTING <br />ON THE SLICE DUE TO SURFACE <br />LOADING. ' <br />110111III1111 m i Il <br />006779 <br />W.A.WAHEEO COLOWYO COAL COMPANY I MODIFIED INFINITE SLOPE ANALYSIS <br />& ASSOCIATES PROJECT NO. DATE ^'c DRAW INI <br />