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JUmmi-y 15. 2008 <br />7500 <br />Page -14 <br /> <br />ofile <br />Figure 14. Surveyed Section of Z-Dip Cut #2 Pit Spoil Failure Showing Pre-Slide <br />(Green Line) and Post-Slide Profile (Magenta) <br />and silty mudstone bedding immediately below the Q-Seam. The material below the Q-Floor <br />mudstone was assumed to be a sandstone material. No other bedding planes were simulated. All <br />the rock was assumed to behave according to a Mohr-Coloumb relation of elastic (pertcctly <br />plastic). The mudstone simulated the thinly bedded behavior using a ubiquitous joint behavior to <br />simulate a weakness along the bedding (dip 8° to north). Table 2 shows the material properties <br />used t6r this spoil calibration analysis. Assuming negligible cohesive and tensile strength ofthe <br />spoils reasonably represents the freshly-placed condition ofthe spoils. <br />Table 2. Mechanical Properties Used in the ZD-02 Spoil Calibration FLAC31) <br />Model <br /> Young' RN1 <br /> Density Ntodutus, E Poisson's Cohesion RN1 Rat Tensile <br />Strata (Pct) (Ps() Ratio (ksf) Friction (°) (ksf) <br />Sandstone I5_'.3 71.1 0?4 91.3 25.8 6.0 <br />Q-Floor htudstone 134.8 38.3 0.37 35.1/ 0 5.8/5 5.1' 0 <br />Spoil 125 3.5 0.35 0 - 0 <br />Agapito Associates. Inc.