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Table 1: Summary of rock properties for the interurden rock between Wadge and Wolf Creek seam at Foidel Creek Mine <br />Height above WF seam, ft <br />Bed <br />Uni-axial compressive strength, psi <br />Youngs modulus, 106 psi <br />Density, lb/ft' <br />Tensile <br />(refer to <br />sonic plot) <br />thickness, <br />strength, <br />From <br />To <br />ft <br />Average Stddev <br />Minimum Maximum Average <br />Std dev <br />Minimum Maximum Average Stddev <br />Minimum Maximum <br />psi <br />124 <br />132 <br />8 _ <br />5839 <br />4642 <br />2340 <br />17841 <br />_ 072 <br />0.39 <br />033 <br />1.58 <br />140 <br />25 <br />96 <br />160 <br />108 <br />124 <br />16 <br />7889 <br />3367 <br />2998 <br />14054 <br />106 <br />041 <br />026 <br />168 <br />157 <br />4 <br />150 <br />162672 <br />98 <br />108 <br />10 <br />3903 <br />1776 <br />1890 <br />6714 <br />052 <br />029 <br />006 <br />0.86 <br />155 <br />5 <br />144 <br />158 <br />639 <br />68 <br />98 <br />30 <br />5656 <br />2164 <br />2553 <br />10926 <br />0.79 <br />0.34 <br />0.29 <br />1.56 <br />151 <br />5 <br />142 <br />158 <br />819 <br />66 <br />68 <br />2 <br />weak zone- <br />no data (assumed as coal) <br />38 <br />66 <br />28 <br />5758 <br />1416 <br />3365 <br />10031 <br />073 <br />0.24 <br />010 <br />133 <br />149 <br />6 <br />139 <br />159 <br />1233 <br />Interburden <br />28 <br />38 <br />10 <br />5312 <br />1785 <br />2011 <br />7361 <br />0.59 <br />0.31 <br />0.09 <br />0.94 <br />158 <br />5 <br />149 <br />165 <br />1138 <br />19 <br />28 <br />9 <br />5464 <br />2864 <br />1558 <br />10584 <br />075 <br />050 <br />008 <br />150 <br />161 <br />9 <br />150 <br />183 <br />497 <br />17 <br />19 <br />2 <br />9 _ <br />17 <br />8 <br />6073 <br />3262 <br />3044 <br />12098 <br />0.81 <br />033 <br />0.48 <br />1.33 <br />157 <br />2 <br />154 <br />159 <br />580 <br />6 <br />9 <br />3 <br />0 <br />6 <br />6 <br />7046 <br />2547 <br />3282 <br />10487 <br />089 <br />0.38 <br />0.25 <br />1.33 <br />�151�414401�156 <br />580 <br />Floor -8 <br />-16 <br />8 <br />8137 <br />3738 <br />1864 <br />14888 <br />1.03 <br />0.51 <br />007 <br />1.72 <br />815 <br />Page #6 <br />