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sheet 1 of 2 <br />Task # : 001 State :Colorado PermiVjob # : M-1987-028 <br />Date : 11/01/2004 County :Chaffee Abbreviation : none <br />User : ESC Site :Lily Mines Filename : M028-001 <br />Agency or organization name : DMG <br />Permit or other job action :Surety Increase <br />Task description :Create 20' Benches on the South Highwall <br /> <br />,;: ;< ,; <br />., ;. . <br />BLAST AREA DIMENSIONS <br /> QUANTITY UNIT <br />Blast area configuration description Box-shaped mass <br />Blasting method description Conventional surface blast <br />Highwall or bench face angle 0.50 h:1v <br />Regraded slope angle NA h:1v <br />Highwall or bench length 2(10 eet <br />Highwall or bench width (from vertical line at base of desired cut on highwall face) 12 eet <br />Highwall or bench height (from pit floor to crest) 40.0 eet <br />Deplh to base of cut at highwall face 20.0 eet <br />Total volume of dimensional mass to be shot 1,037 cubic yard <br />Blast volume to subdrill grade and blast pattem lines 722 cubic yard <br />Blast volume to finish grade and blast pattern lines 722 cubic yard <br />Remaining volume required to be re-shot or dpped <br />BLAST AREA DESIGN 315 <br /> <br />QUANTITY cubic yard <br /> <br />UNIT <br />Recommended blasthole diameter 2.67 inches <br />Selected blasthole diameter 5.00 inches <br />Subdrilling allowance 0.0 eet <br />Blasthole depth (avn. depth of holes on wedge-shaped massl 20.0 eet <br />Density of rock verage Den: <br />Burden ro Charge Diameter Ratio 25 <br />Burden 10.0 <br />Spacing to Burden RaBo 1.5 <br />Spacing 15.0 <br />Cubic yards of rock per blasthole (avg. quantity per hole onwedge-shaped mass) 111.11 <br />Powder factor description Medium <br />Powder factor 0.575 <br />Density of blasting agent 0.85 <br />Quantity of explosives per blasthole (avc. auanfity per hole on wedge-shaped massl fi3.89 <br />Height of powder column per blasthole (avg. height per hole on wedge-shaped mass) 8.83 eet <br />Height of stemming per blasthole (avg. height per hole on wedge-shaped mass) 11.17 eet <br />Stemming to burden ratio (avg. ratio per hole onwedge-shaped mass) 1.12 Imes burden <br />Quantity of stemming per blasthole (avg, quantity per hole on wedge-shaped mass) 0.0564 cubic yards <br />Number of rows 1 rows <br />Number of blastholes per row 13 holes per row <br />Total number of blastholes 13 holes <br />Total length of all blastholes 260 eet <br />CIRCES Cost Estimatinsa Software <br />