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~~ <br /> <br /> <br /> <br />Plane Shear Analysis <br />The resisting force for the slice is T = C + N tan p: <br />Where: T is the shear stress <br />N is the normal forces as weight of <br />(See Figure 8) sliding position multiplied by the <br />cosine of the failure plane angle (i) <br />= W cos i <br />~ is the angle of internal friction, 37° <br />1 i•. rnp ar. ~ilr nr i~i.• ., ..im!rn ;tJ'e 55 <br />tdilinr• pl.n„~, ~~r•' i,is,u-rnri, rt al, 1971) <br />Fora no cohesion analysis: <br />• T = N tan 35° = W cos i tan p <br />The driving force (D F) is the weight of the block multiplied by sin of the <br />failure plane angle (i) <br />DF=Wsin i =Wsin 35 <br />If the driving force is less than the resisting force; no failure occurs. <br />T > DF or W cos i tan 35 > W sin 35 or 0.62 W > 0.57 W <br />Which is the situation of the proposed Occidental Oil Shale dump for <br />the construction and geometry proposed. <br /> <br />-17- <br />