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III <br />1 <br />1 <br />~r <br />1 <br />I, 1 <br />1 <br />1 <br />TABLE 7 <br />JOINT CONTROLLED DESIGN -UNALTERED MATERIALS <br />EAST PIT ORE ZONE <br />Sector Failure Slope Planes FOS Apparent <br /> Mode Height (no.) Plunge <br /> (ft.} {degrees) <br />I Wedge 210 1&3 1.1 36 <br /> NORTH WALL Planar 1 1.0 36 <br />II 75 <br /> WEST WALL (all wedg s dipping steep r than 55 degre s) <br />III Wedge 105 3i£4 1.5 39 <br /> SOUTH WALL Wedge 3&2 1.5 46 <br />IV Planar 105 4 .4 58 <br /> SOUTH WALL <br />V EAST WALL 150 3&4 1.5 33 <br /> Wedge <br /> Wedge 3&2 1.5 34 <br /> Wedge 1 &3 1.1 50 <br />A further analysis was employed to determine the effect the Green Clay would have oui tha stability <br />of the overlying Pink Gneiss/Santa Fe formations, Figure 17. It was found that due to the high <br />cohesion and the orientation of the fault with respect to the final wall that the ultimate failure <br />surtace would not pass through the fault material but through efther the Pink Gneiss and/or Santa <br />Fe materials. <br />7.3 Design <br />The ultimate pit slope design is shown in Figure 18 and Table 9. <br />The relationship between overall slope angle to the bench geometry is shown in Figure 19. The <br />recommendations for the various slopes are as follows: <br />