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0 <br />N <br />W <br />0 <br />T <br />4 <br />W <br />A <br />L <br />Table 1. Predicted Maximum Subsidence for Selected Panels, McClane Canyon Mine <br />Panel <br />Panel <br />Panel <br />Ratio <br />Lmax <br />Robbed <br />Lmax <br />Super- <br />Panel <br />Predicted <br />Ident. <br />Width <br />Mid -Depth <br />Panel <br />Pillar <br />(Pillar Ht <br />Critical <br />Correction <br />Smax <br />feet <br />feet <br />Width/ <br />Width <br />/Panel <br />Subsidence <br />Factor <br />feet <br />(meters) <br />(m) <br />Depth <br />(feet) <br />Depth) <br />(feet) <br />1 <br />465 <br />900 <br />0.517 <br />19.15 <br />20 <br />9.576 <br />35.5% <br />0.55 <br />1.95 <br />(142m) <br />(274m) <br />(3.55) <br />2 <br />570 <br />400 <br />1.425 <br />9.89 <br />25 <br />3.954 <br />24.9% <br />0.61 <br />1.52 <br />(174m) <br />(122m) <br />(2.49) <br />3 <br />535 <br />500 <br />1.070 <br />11.97 <br />30 <br />3.990 <br />25.0% <br />0.81 <br />2.02 <br />(163m) <br />(152m) <br />(2.50) <br />4 <br />515 <br />800 <br />0.644 <br />27.86 <br />20 <br />13.93 <br />39.9°x6 <br />0.64 <br />2.56 <br />(157m) <br />(2.44m) <br />(3.99) <br />5 <br />340 <br />355 <br />0.958 <br />7.77 <br />34 <br />2.285 <br />18.4% <br />0.85 <br />1.56 <br />(104m) <br />(108m) <br />(1.84) <br />NOTES: Assumed 160 PCF overburden density, 10 -foot mining height, stump pillar widths are minimums after pillar robbing on the <br />retreat from the panel, all values approximate? <br />Cn <br />C <br />Cr <br />CL <br />CD <br />0 <br />CD <br />c <br />CD <br />(n <br />C <br />Cr <br />Cn <br />a - <br />CD <br />0 <br />CD <br />K <br />0 <br />0 <br />c� <br />v <br />CL <br />Cn <br />c <br />Q: <br />CD <br />0 <br />(D <br />n <br />0 <br />0 <br />