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sheet 1 of 2 <br />• CIRCES Cost Estimating Software <br />SIIRFACF RI ARTING Wr1RK <br />Task # : 01 c State :Colorado Permitlob # : G1994-082 <br />Date : 03/172005 County :Routt Abbreviation :none <br />User: JRS Site :toast Mine Filename :C082-01c <br />Agency or organization name :Colorado Division Of Minerals And Geology <br />Permit or other job action :Permit Renewa102 <br />Task description :Drill and Shoot Wolf Creek Pit North Highwall <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 1,225 eet <br />Highwall or bench width (from vertical line at base of desired cut on highwall face) 40 eet <br />Highwall or bench height (from pit floor to crest) 100.0 eel <br />Depth to base of cut at highwall face <br /> <br />:::~... <br />..>:a<.: <br />;:...:..:w ~.F .., . ...:.... ...... ::.:.....:.. <br />,:u>:.: <br />:::"~i............w:iu:.:':i1:i`;'G:`.,~i`.., :.:,oy. <br />,u.:.:^....'a"Q.....,...... .t........ , ... !:(;»•Y.:::.<sa::.:'.au.:YU::>::~~::[J.xd:.;>Y.::e.:y::1`Y'L'T.,i$S.i:.:::.o.:<^._G';a::.x:.:~.y:~~.j:.:4::» <br />.:?iY.'i:.' :21>,> ,]:'~'?:<. N. ...~.. u. .Tl, i ... ,. s...... .. ,2, .v.. 1. ..,......y w.v 40.0 <br /> <br /> <br /> <br /> <br />...:M <br />:a:::.y::ev:z.:c.>:oy..,:::.. ~: <br />..u..fi .,.. U.L'~ .... ..... et <br /> <br /> <br /> <br /> <br />':'}.:.xn. ~!Ir.:;:!i!`r.'::Y~ <br /> <br />........... ..... ?`.:,.:1h.'.~ <br />BLAST AREA VOLUMES <br />QUANTITY ~ UNIT <br />18.148 ubic vard <br />• Total volume of dimensional mass to be shot <br />Blast volume to subdrill grade and blast patte <br />Blast volume to finish grade and blast pattern lines ~ 13,511 cubic yards <br />Remaining volume required to be re-shot or ripped 4.637 bic vards <br />BLAST AREA DESIGN <br />C J <br /> QUANTITY UNIT <br />Rewmmended blasthole diameter 5.88 inches <br />Selected blasthole diameter 9.00 inches <br />Subdrilling allowance 5.7 eet <br />Blasthole depth (avg. depth of holes onwedge-shaped mass) 16.2 eet <br />Density of rock verage Density R rock density <br />Burden to Charge Diameter Ratio 25 imes diameter <br />Burden 19.0 eet <br />Spacing to Burden Ratio 1.1 imes burden <br />Spacing 21.0 eet <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 eet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) 11.69 eet <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 0.62 imes burden <br />Quanthy 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 58 holes per row <br />Total number of blastholes 116 holes <br />Total length of all blastholes <br />~ ~ s F'~ ~ s .' 3 S <br />nc ~..... 1,879 <br />s q <br />.., uc ... eet <br /> <br />.n. n.._.... .... ..u~ -~ <br />