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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Table 4. SRM_R: StrengL7 Cor==_lation as Determined at Island <br /> Conner Mine and Gatchell Mine <br /> Rat'_nq Strengt_'~ Parameters <br />Roc!c SRMR Island Con__rer Mine Gatchell Mine <br />Mass <br />Class C'(psi) 0' C'(psi) 0' <br />IVa 35-40 12.5 40 - - <br /> 30-35 I0.5 36 - - <br />IV1~ 25-30 10.0 34 7.0 30 <br /> 20-25 20.0 30 7.0 26 <br />Va 15-20 9.0 27.5 7.0 24 <br />Vb 5-'_5 7.5 24 2.0 21 <br />