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<br />POWDERHORN COAL COP4PANY <br />FIGURE 2.05.6 D <br />STRAIN-SUBSIDENCE-DEPTH RELATIONSHIP <br />i. <br /> <br />_s <br />C <br />S <br />I <br /> i ~ <br /> _' i -- - I . <br /> <br />~_ <br />- <br />_ <br />- - <br /> <br />- <br />I i <br />- s~brF <br />~ I <br />i <br />~i i I i - -- <br />I r <br />~ ~ I I FSiF15N1 <br />I, ~ ~ ~ - ~ ~ MIAFSSGe <br />0 <br />v. u~~ b~b 0'b I~b 1~7 I~G <br />•~b <br />Graph for predicting maximum slope and strain for <br />various width/depth ratios of panel. <br />w/h +E -E G <br /> <br />0.24 0.6 S/h 2.2 S/h 2.55 S/h <br />0.3 0.7 S/h 2.0 S/h 2.95 S/h <br />0.5 0.8 S/h 1.35 Sih 3.35 S/h <br />0.8 0.65 S/h 0.7 S/h 2.8 S/h <br />1.4 0.65 S/h 0.51 S/h 2.75 5/h <br />S Maximum Subsidence <br />h - Depch of Overburden <br />w Width or Span Acroas The Panel <br />+E _ `]aximum Tensile Strain <br />-E _ `laximum Compressive Strain <br />G `faximum Slope Of The Subsidence Trough <br />C <br />