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<br />TABLE 55 <br />Blasting Parameters -Coal <br /> <br /> <br />Dcplosive Material ANE'O or S9ater Proof Slurry <br />Hole Depth 15 ft. <br />Hole Diameter 3 inches <br />Hole Stemting 12.7 ft. <br />Pa,r3er Colimm 2.3 ft. <br />Pourrls of Pocder Per Hole <br />(ANF'O Density @ 0.85 cyq/cc) 6 lbs. <br />Povrler Factor 0.20 lbs./ton <br />'Ions Per Hole 29.4 tons <br />Drilling Pattern 7 ft. x 7 ft. <br />Primer 1-~" x 8" stick dynamite <br />12.7 <br />STEMMING <br />PRIMER <br />2.3 ANFO <br />TYPICAL POWDER COLUMN <br />POINT OF <br />INITIATION <br />OPEN FACE <br />~~9 MS DELAY <br />TYPICAL DELAY PATTERN <br />