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n <br />L_ J <br />TABLE 4 <br />BLASTING PARAMETERS - COAL <br />SEAM <br />Explosive Material <br />Hole Depth <br />Hole Diameter <br />hole Stemming <br />Powder Column <br />Pounds of Powder Per Hole <br />Powder Factor <br />Tons Shot Per Hole <br />Drill Pattern <br />Explosive Primer <br />• <br />PF <br />lemming <br />Explosives <br />TYPICAL POWDER COLUMN <br />41ADGE <br />ANFO or Emulsion/Slurry <br />10.5' <br />4" <br />5.0' <br />4.5' <br />20 Lb. <br />0.21 Lh/ton <br />95 Tons <br />15 x 15 <br />1/5-1/3 Lb. Cast Primer <br />Point Of Initiation <br /> <br />Open Face <br />