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Table 15-2 • <br />Predicted Subsidence Bowie #1 Mine <br />Panels 11 and 12 North thru Jan. 1991 <br />Monitoring Measured Predicted Comments <br />Stations Subsidence Subsidence <br /> <br />41 0.62 2.6 Barrier pillar <br />40 0.93 2.6 Barrier pillar <br />39 1.83 2.5 <br />38 2.34 2.6 Panel center <br />37 1.26 2.6 <br />52 1.32 2.6 <br />53 1.22 2.7 Barrier pillar <br />54 1.22 2.7 Barrier pillar <br />55 1.25 2.1 Barrier pillar <br />56 1.27 2.1 <br />57 1.34 2.2 • <br />58 1.50 2.4 <br />59 1.81 2.4 Panel center <br />60 1.73 2.4 Panel center <br />61 1.32 2.4 <br />62 0.95 2.5 <br />63 0.70 2.6 <br />64 0.71 2.6 Barrier pillar <br />65 0.59 2.6 Barrier pillar <br />66 0.49 2.7 Barrier pillar <br />67 0.56 1.6 Mains <br />68 0.38 1.6 Mains <br />69 0.46 1.6 Mains <br />Surface curvatures and strains approximately four times larger than those typically <br />experience in Britain have been measured in the U.S. (O'Rourke and Turner, 1981). This <br />may be due to rock mass characteristics which result in steeper limit angles under U.S. <br />- 8 - 10/00 <br />P,2 o y <br />