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<br />i <br />- REGRADED TOPOGRAPHY - <br />- ORIGINAL TOPOGRAPHY - <br />I <br />TOTAL BANK OVERBURDEN <br />AND PARTINGS <br />- TOP OF COAL - <br />TOTAL COAL THICKNESS <br />- PIT FLOOR - <br />Ls <br />db <br />AREA swell = (DEPTHsweli?(LENGTHsection~ <br />AREAbank = ( DEPTHbonk )(LENGTHsectlon~ <br />PERCENT SWELL FACTOR = ~(As/Ab)-~ 100 <br />ILLUSTRATIVE CROSS SECTION <br />