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2008-04-04_REVISION - C1994082 (4)
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2008-04-04_REVISION - C1994082 (4)
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Last modified
8/24/2016 3:27:03 PM
Creation date
4/7/2008 11:24:40 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
REVISION
Doc Date
4/4/2008
Doc Name
Cost Estimate
From
Jim Stark
To
Dan Mathews
Type & Sequence
MT3
Email Name
SB1
Media Type
D
Archive
No
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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 1.00 h:1v <br />Highwall or bench length 2,440 feet <br />Highwall or bench width (from vertical line at base of desired cut on highwall face) 40 feet <br />Highwall or bench height (from pit floor to crest) 100.0 feet <br />Depth to base of cut at highwall face 40.0 feet <br />BLAST AR :::::::....................................................................................................................................................................................... <br />..................................... <br />EA VOLUMES <br />QUANTITY UNIT <br />Total volume of dimensional mass to be shot 36,148 cubic yards <br />Blast volume to subdrill grade and blast pattern lines 42,668 cubic yards <br />Blast volume to finish grade and blast pattern lines 27,022 cubic yards <br />Remaining volume required to be re-shot or ripped 9,127 cubic yards <br />BLAST AREA DESIGN <br /> QUANTITY UNIT <br />Recommended blasthole diameter 5.88 inches <br />Selected blasthole diameter 9.00 inches <br />Subdrilling allowance 5.7 feet <br />Blasthole depth (avg. depth of holes on wedge-shaped mass) 16.2 feet <br />Density of rock verage Density R rock density <br />Burden to Charge Diameter Ratio 25 times diameter <br />Burden 19.0 feet <br />Spacing to Burden Ratio 1.1 times burden <br />Spacing 21.0 feet <br />Cubic yards of rock per blasthole (avg. quantity per hole on wedge-shaped mass) 183.91 cubic yards <br />Powder factor description Medium rock strength <br />Powder factor 0.575 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) 105.75 ounds <br />Height of powder column per blasthole (avg. height per hole on wedge-shaped mass) 4.51 feet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) 11.69 feet <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 0.62 times burden <br />Quantity of stemming per blasthole (avg. quantity per hole on wedge-shaped mass) 0.1913 cubic yards <br />Number of rows 2 rows <br />Number of blastholes per row 116 holes per row <br />Total number of blastholes 232 holes <br />Total length of all blastholes 3, 758 feet <br />
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