Rock Drilling, with Particular Reference to Open Cut Excavation and Submarine Rock RemovalJ. Wiley & sons, 1911 - 319 pagina's |
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17 drills Amherstburg average depth bastard granite blacksmith boiler Cents chuck Coal compressor cost of drilling cost per cubic crusher cu.yds cubic yard blasted Cubic yards pay cut holes cutting minute cutting speed cycle Dana deck Depth of holes Detroit River diameter drill boat drill hour drill per day drill per shift drillers drilling and blasting dynamite per cubic Engineering explosive feet drilled Feet per drill foreman glycerin grade hammer drills hard rock helpers hydraulic idle Ingersoll-Rand Interest and depreciation Large 12mo limestone lin.ft Lineal feet lineal foot drilled Lobnitz machine material Miscellaneous delays Moving drill mucking nippers nitroglycerin Number of holes operation piston plant powder pressure pump quarry Ratio sand pipe scow soft rocks spud standard basis steam sticks stroke Subaqueous toe holes tons Total cost Total drilling track tunnel wages yards of pay yards pay rock ΙΟ
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