Laserfiche WebLink
sheet 1 of 2 <br />CIRCES Cost Estimating Software <br /> QUANTITY UNIT <br />Blast area configuration description Wedge-shaped mass <br />Blasting method description Cast blast <br />Highwall or bench face angle 0.71 h:1v <br />Regraded slope angle 3.00 h:1v <br />Highwall or bench length 5,300 feet <br />Highwall or bench width (from vertical line at base of desired cut on highwall face) 180 feet <br />Highwall or bench height (from pit floor to crest) 120.0 feet <br />nenth to base of cut at highwall face <br />_ .. <br />..............60.0 <br />eet <br /> QUANTITY UNIT <br />Recommended blasthole diameter 8.00 inches <br />Selected blasthole diameter 10.62 inches <br />Subdrilling allowance 0.0 feet <br />Blasthole depth (avg. depth of holes on wedge-shaped mass) 24.8 feet <br />Density of rock Cast blasting (AN rock density <br />Burden to Charge Diameter Ratio 20 times diameter <br />Burden 18.0 feet <br />Spacing to Burden Ratio 1.1 times burden <br />Spacing 20.0 feet <br />Cubic yards of rock per blasthole (avg. quantity per hole on wedge-shaped mass) 358.28 cubic yards <br />Powder factor description Cast blasting rock strength <br /> 2.150 pounds/cu.yd. <br />Powder factor <br /> 0.85 grams/cc <br />Density of blasting agent <br />Quantity of explosives per blasthole (avg. quantity per hole on wedge-shaped mass) 770.31 ounds <br />Height of powder column per blasthole (avg. height per hole on wedge-shaped mass) 23.58 feet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) 1.22 feet <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 0.07 times burden <br />Quantity of stemming per blasthole (avg. quantity per hole on wedge-shaped mass) 0.0279 cubic yards <br />Number of rows 8 rows <br />Number of blastholes per row 265 holes per row <br />Total number of blastholes 2,120 holes <br />Total lannth of all blastholes 52,576 feet