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<br />Sneet 1 of z <br />Task # : 003 State :Colorado PennifQob # : G1982-057 <br />Date : 08/05/2005 County :Rout! Abbreviation atone <br />User: JRS Site :Senecali-W Flename:C057-003 <br />Agency ar organization name :Colorado Division Ol Minerals And Geology <br />Permit or other job action :Permit Renews! 04 <br />Task description :Drill and Shoot Sage Creek/WoH Creek Pit Highwall <br />At AST AREA MMFNSir]NR <br /> gUANTITY UNIT <br />Blast area configuration description Wedge-shaperd mass <br />Blasting method description Cast blast <br />Highwall or bench face angle 0.50 :1v <br />Regraded slope an91e 1.00 h:1v <br />Highwall or bench length 1,800 et <br />Highwall or bench width (from vertical line at base of desired cut on highwall face) 40 et <br />Highwall or bench height (from pit floor to crest) 110.0 et <br />Depth to base of cut at hghwall face ~Y~ 40.0 eet <br />BLAST ARFr4 VOLUMES <br />• Total volume of dimensional mass to be shot <br />Blast volume to subddll grade and blast pattern line <br />Blast volume to finish grade and blast pattern lines <br />or <br />• <br />m <br /> QUANTITY UNIT <br />Recommended blasthole diameter 5.88 inches <br />Selected blasthole diameter ~ 9.87 nches <br />Subdrilting aibwance 6.3 et <br />Blasthole depth (avg. depth of holes on wedge-shaped mass) 26.3 t <br />Density of rock verage Density rock density <br />Burden to Charge Diameter Ratio 25 Imes diameter <br />Burden 21.0 eet <br />Spacing to Burden Ratfo 1.1 'mes burden <br />Sparing 230 eet <br />Cubic yards of rock per blasthole (avg. quantity per hole on wedge-shaped mass) 147.30 wbic 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) ERR ands <br />Height of powder column per blasthole (avg. height per hole on wedge-shaped mass) 3.00 eet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mess) 23.30 et <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 1.11 "mes burden <br />Quantity of stemming per blasthole (avg. quanfity per hole on wedge-shaped mass) ERR wbic yards <br />Number of revs 0 rows <br />Number of blastholes per row 78 oles Der row <br />Total number of blastholes 0 oles <br />Total length of aN blastholes <br />LskA c<' .s»p3z' M. ~~ ~ ~ sa :<.,~T r~`~,E~-iy.S'r ~~- .'x" <br />s~F„ .,~` Si a,a.e..ta ~3 ...r: ~ i.r, F.~'?~u.?t' r+ ~ ~~~ '3S a°5n..re~ .... 2051 <br />s3rx~~g 4s4ycc Sa <br />~~k~ et <br />~.;3T~o~-•~, <br />CIRCES Cost Estimatlna Software <br />