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sheet 1 of 2 <br />• CIRCES Cost Estimatinst Software <br />cr rocecc er eeTrur_ urno~r <br />PROJECT IDENTIFICATION <br />Task # : 01 d State :Colorado Permitlob # : C-1994-082 <br />Date : 03/212005 County : Routt Abbreviation :none <br />User: JRS Site:YoastMine Filename:C082-0fd <br />Agency or organization name :Colorado Division Of Minerals And Geology <br />Permit or otherjob action :Permit Renewa102 <br />Task descriptidn :Drill and Shoot Wolf Creek Pit South Highwall <br />AREA DIMENSIONS <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 2,400 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 />::.<Ni::>R::L'. i:Y 5"':.:.:::i::..:o:::q.'::i::: ...:.nk <br />:i:.~<.y......... .. ... ... . <br /> <br /><::R::.. .:~R'~in <br />.':::i:..:n <br /> <br /> <br />n ..:un..: < . ..:.. ...:.: .~ ..... .. ............ .~. <br />.. n. ...~..• . .. .n .... .. .. . ... .. ..:iw <br /> <br />P.i....nyni:[a...a[:u::y:.J..i:•uY.~>....a.a ne:::?y%.[[...:i:ii>.i'.... <br />ii:..:f!o~gv,.. Tttn;C:I..::Yiy`:i~.:.F2::i.:in.:eve'....F.\...:Y'.;:Ci)?:us:iYi.:::..~.J aainm~... ... .. ..~ <br />..n ... ~i:Y :v . . . . <br />...........~..~>....dF....WiJ:.<:i<vC ^I.v.~x.:>.<•n;JlC.+4.:...nv:n"in..v....nv.viFlu...'.::...i..i..v".~v'n.n.nv....:.invn.m..T.:n..~:invW:.vi:.NiY..>.~:.C::..:G:::..ri 40.0 <br />::.::.:M:a: y::.::...:arc;::..:.n:...... <br /> <br />~...~... <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />'<vLv:: b:i:++.!.~' <br />.~:.::(vM.nvvnv. "i:nv <br />ti.nu:.R..,...f...<..r . eet <br /> <br /> <br />v. E.. <br /> <br /> <br />:^fR': <br /> <br /> <br /> <br /> <br /> <br />i"!o <br />.. ... <br />......:........~.,..~..,.~... ems, <br />BLAST AREA VOLUMES <br />• Total volume of dimensional mass to be shot <br />Blast volume to subdrill glade and blast pattern lines <br />Blast volume to finish grade and blast pattem lines <br />Remaining volume required to be re-shot or ripped <br />• <br />BLAST AREA DESIGN <br />UNlT <br /> QUANTITY UNIT <br />Recommended 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 rack verage Density rock density <br />Burden to Charge Diameter Ratio 25 Imes diameter <br />Burden 19.0 et <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 ubic yards <br />Powder factor description Medium rock strength <br />Powder factor 0.575 pounds/cu.yd. <br />Density of blasting agent 0.85 rams/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 onwedge-shaped mass) 4.51 eet <br />Height of stemming per blasthole (avg. height per hole onwedge-shaped mass) 11.69 eet <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 0.62 imes burden <br />Quantity of stemming per blasthole (avg. quantity per hole onwedge-shaped mass) 0.1913 ubic yards <br />Number of rows 2 rows <br />Number of blastholes per row 114 holes per row <br />Total number of blastholes 228 holes <br />Total length of all blastholes 3,694 eet <br />