Laserfiche WebLink
Average Size Tenor <br /> Material above 6" 20% by weight <br /> Material above 4" 30% by weight <br /> Material above 2" 30% by weight <br /> Material above 4 mesh* 10% by weight <br /> Material above 10 mesh* 5% by weight <br /> Material above 40 mesh* less than 5% by weight <br /> Material above 200 mesh* less than 5% by weight <br /> * U.S. Series equivalent screen size <br /> Emplacement <br /> See Map C-13 and C-14 for dimensions and configuration of <br /> coal refuse disposal pile. Waste will be placed with a front- <br /> end loader and compacted in two foot lifts with a bull dozer. If <br /> necessary, compaction will be done with a sheep's foot roller. <br /> Stability <br /> 1) Stability was determined from Terzaghi's formula: <br /> Resisting Force (Rl <br /> Stability (G) = Driving Force (P) <br /> G less than 1, unstable slope <br /> G greater than 1, stable slope <br /> G equal to 1, slope in equilibrium <br /> * It is a requirement of the Colorado M.L.R.D. that <br /> G be 1.5 or greater <br /> 2) Driving force was determined from Rankine's formula: <br /> 1 1 minus sin 0 <br /> Driving Force (P) = 2 WH' 1 plus sin <br /> P is driving force, pressure/ft. of length <br /> W is weight of fill/ft.' <br /> H is height of fill <br /> 9 is angle of repose of material <br />