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CIRCES Cost Estimating Software <br />PROJECT IDENTIFICATION <br />sheet 1 of 2 <br /> QUANTITY UNIT <br />Blast area configuration description Wedge-shaped mass <br />Blasting method description Cast blast <br />Highwall or bench face angle 0.50 h:1v <br />Regraded slope angle 3.00 h:1 v <br />Highwall or bench length 2,200 feet <br />Highwall or bench width (from vertical line at base of desired cut on highwall face)) 165 feet <br />Highwall or bench height (from pit floor to crest) 125.0 feet <br />Depth to base of cut at highwall face 55.0 feet <br />BLAST AREA VOLUMES <br />QUANTITY UNIT <br />Total volume of dimensional mass to be shot 308,102 cubic yards <br />Blast volume to subdrill grade and blast pattern lines 267,681 cubic yards <br />Blast volume to finish grade and blast pattern lines 267,681 cubic yards <br />Remaining volume required to be re-shot or ripped 40,421 cubic vards <br />BLAST AREA DESIGN <br /> QUANTITY UNIT <br />Recommended blasthole diameter 7.33 inches <br />Selected blasthole diameter 7.88 inches <br />Subdrilling allowance 0.0 feet <br />Blasthole depth (avg. depth of holes on wedge-shaped mass) 30.8 feet <br />Density of rock Cast blasting (AN rock density <br />Burden to Charge Diameter Ratio NA-user data times diameter <br />Burden 30.0 feet <br />Spacing to Burden Ratio NA-user data times burden <br />Spacing 30.0 eet <br />Cubic yards of rock per blasthole (avg. quantity per hole on wedge-shaped mass) 916.71 cubic yards <br />Powder factor description Cast blasting rock strength <br />Powder factor 2.150 pounds/cu.yd. <br />Density of blasting agent 0.85 grams/cc <br />Quantity of explosives per blasthole (avg. quantity per hole on wedge-shaped mass) 1,970.94 ounds <br />Height of powder column per blasthole (avg. height per hole on wedge-shaped mass) 109.81 eet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) -78.98 feet <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) -2.63 t imes burden <br />Quantity of stemming per blasthole (avg. quantity per hole on wedge-shaped mass) -0.9894 cubic yards <br />Number of rows 4 r ows <br />Number of blastholes per row 73 holes per row <br />Total number of blastholes 292 holes <br />Total length of all blastholes 9,003 f eet