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<br />TABLE 6 <br />Blasting Parameters - Coal <br />(Typical) <br />Explosive Material ANFO or Water Proof Explosive <br />Hole Depth (Average) 8 feet <br />Hole Diameter 4 inches <br />Hole Stemming 6 feet <br />Powder Column 2 feet <br />Powder Factor 0.12 lbs./ton <br />Drilling Pattern 12 ft. x 12 ft. <br />MS Delays None <br />NOTE: Because of the thickness variations of the coal <br />seams at the Colowyo operation, the above <br />parameters represent an example of the coal <br />>.ng pz <br />CORD <br />6~ S7ElAMING <br />2~TYPE ~A~ <br />GEl <br />TYP/G7L POWDE.•4 LtJLUMN <br />ogram. <br />POINT OF <br />1N171AT10N <br />TYPICAL DELAY PATTERN <br />?.05-30 <br />