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<br />OVERALL <br />ci nnr i <br />1 `~ W <br />H/2 1 D O.OSW <br />y <br />p PSUEDOSTATIC <br />--- ~li- <br />~ ~~ <br />I Jl..f\I~1 <br />1~ <br />~--- L --- <br />I <br />FORCES ON TYPICAL BLOCK <br />NOTE:, <br />1) WATER SHOWN TO 1/2 INTERBURDEN <br />HEIGHT ABOVE B-SEAM. MODEL UTILIZED <br />EITHER 1/2 OR FULL HEIGHT WATER IN <br />EACH INTERBURDEN ABOVE EACH COAL SEAM. <br />2) UNIT WEIGHTS USED <br />ROCK 150 pcf <br />COAL 86 pcf <br />I. <br />