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<br />CIRCES Cost Estimating Software <br />Task # : 004 State :Colorado <br /> QUANTITY UNIT <br />Blast area configuration description Wedge-shaped mass <br />Blasting method description Cast hlast <br />Highwall or bench face angle 0.00 h:1v <br />Regraded slope angle 5.00 h:1v <br />Highwall or bench length 619 eel <br />Highwall or bench width (tram vertical line at base of desired cut on highwall face) 40 eel <br />Highwall or bench height (from pit floor to crest) 79.0 e[ <br />Depth to base of cut at highwall face <br />i F <br />m... -:: xu..a.n..[ ~..~a .L :.': [ a ... <.ac: [.. ......[.anW..: ...~>[.[~ .uv:m..[a:.. ~[°u ... 8.0 <br /> <br />.n.xnn. Y 9':' t <br /> <br />...tin ~~..[4i <br />sheet 1 of 2 <br />Date : 05/012007 County :Gunnison Abbreviation :crone <br />User : SLB Site :New Hodzon Mine Filename :COOB-004 <br />Agency or organizafion name : CDRMS <br />Permit or other job action :Technical Revision No. 54 <br />Task descdption :Drill and shoot highwall s/de of p!t ramp <br />p r .~ h. _ ~ST9l%'~R i~ 3' .. <br />.)Y ..::: ... ..JwR\`..fS..;. rV[r .C ......+.R w ..~ ~~.wa:.6 .T ~ 5 ~a. ~. ~ ~ ...: :...~:....... :..~[...«Yn c..wn »:[aM.. : 3».v.... :{ <br />BLAST AREA DIMENSIONS <br />BLAST AREA VOLUMES <br />OUANTITY <br />of dimensional mass to be <br />• Blast volume to subddll grade and blast pattern lim <br />Blast voume to finish grade and blast pattern lines <br />Remaining volume required to be re-shot or riooed <br />DESIGN <br />I <br /> QUANTITY UNIT <br />Recommended blasthole diameter 1.07 inches <br />Selected blasthole diameter 6.00 inches <br />Subdrilling allowance 0.0 et <br />Blasthole depth (avg. depth of holes on wedge-shaped mass) 4.8 eet <br />Density of rock NA-user data rock density <br />Burden to Charge Diameter RaBo 33 'mes diameter <br />Burden 17.0 eel <br />Spacing to Burden Rago 1.1 'mes burden <br />Spacing 19.0 eel <br />Cubic yards of rock per blasthole (avg. quantity per hole on wedge-shaped mass) 75.37 bic yards <br />Powder factor description Medium rock sVength <br />Powder factor 0.575 poundslcu.yd. <br />Density oT blasting agent 0.85 rams/cc <br />Quantity of explosives per blasthole (avg. quantity per hole on wedge-shaped mass) 43.34 nds <br />Height of powder column per blasthole (avg. height per hole on wedge-shapetl mass) 4.18 et <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) 0.44 et <br />Stemming to burden ratio (avg. ratio per hole on wedge-shaped mass) 0.03 'mes burden <br />Quantity of stemming per blasthole (avg. quantity per hole on wedge-shaped mass) 0.0032 cubic yards <br />Number of rows 1 rows <br />Number of blastholes per row 32 holes per row <br />Total number of blastholes 32 holes <br />Total length of all blastholes 147 eet <br />x. <br />PenniUjob # :C-1981-008 <br />(tte~i5ed zaMayo7) Attachment 3.02.2-2-17 <br />