Mining Methods and Costs at the South Burns Shaft of Golden Conqueror Mines, Inc., Cripple Creek, Colo |
Common terms and phrases
1-inch hollow 1-inch screen 14 10th level 12 feet deep 9th level 12th assay barren Basic dike basic rocks Beacon Hill blocks Breccia Latite breccia mass Breccia Syenite dike Breccia with syenite broken Bureau of Mines Burns shaft Breccia burnt-cut Casual pillars chutes Coarse Colorado cost per machine Cripple Creek district dike cuts Dikes of phonolite dry tons excavated expense feet deep 45 Flat Open Stopes flat stope Geol gneiss Golden Conqueror Mines Granite hoisted Indirect charges Item Labor Latite Breccia Latite dike Breccia Latite Phonolite dike lessee level 12th level Leyner machine shift manways mineralization North Breccia operation payroll tax percent portion of 10th round schist screen 14 feet sheeted zones Shrinkage Stopes Shurtloff shaft slabbing for turn-outs South Burns shaft split-check steel stope was mined Straight drifting stulls support the back syenite and latite Syenite dike Latite timber tonnage Total vertical ore shoots wall rocks waste widening drifts