Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work .. High - nitrogen or carbon dioxide and low - oxygen gases-- Rico district , Colorado .. Cripple Creek district , Colo- rado_ . Rock - strata gases- Utah ...
... Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work .. High - nitrogen or carbon dioxide and low - oxygen gases-- Rico district , Colorado .. Cripple Creek district , Colo- rado_ . Rock - strata gases- Utah ...
Side 1
... methane , is in mind and that the reference is to coal mining . Although methane is likely to occur in any coal mine , the metal mines of the world contain by far a greater variety of gases than do the coal mines . Often the gases in ...
... methane , is in mind and that the reference is to coal mining . Although methane is likely to occur in any coal mine , the metal mines of the world contain by far a greater variety of gases than do the coal mines . Often the gases in ...
Side 2
... METHANE OR HYDROGEN IN METAL MINES OR TUNNELS Notwithstanding the fact that to the metal miner methane is almost invariably associated with coal mines , scarcely a year passes without one or more ignitions of methane in other types of ...
... METHANE OR HYDROGEN IN METAL MINES OR TUNNELS Notwithstanding the fact that to the metal miner methane is almost invariably associated with coal mines , scarcely a year passes without one or more ignitions of methane in other types of ...
Side 3
... methane ignitions have occurred in all three States comprising the tri - State lead - zine district . Methane has been found also in at least one iron ore mine in Alabama and during some quick- silver mining in California . Methane ...
... methane ignitions have occurred in all three States comprising the tri - State lead - zine district . Methane has been found also in at least one iron ore mine in Alabama and during some quick- silver mining in California . Methane ...
Side 4
... methane in light- ing a cigaret ; 29 men were burned , although , fortunately , none were killed . Samples of air from the tunnel were analyzed and found to contain appreciable percentages of methane . 3. In 1914 , while sinking for a ...
... methane in light- ing a cigaret ; 29 men were burned , although , fortunately , none were killed . Samples of air from the tunnel were analyzed and found to contain appreciable percentages of methane . 3. In 1914 , while sinking for a ...
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Vanlige uttrykk og setninger
activated iodine pentoxide adequate amounts asphyxial asphyxial gases atmosphere Bull Bureau of Mines burning candle carbide lamp carbon dioxide carbon monoxide cent of carbon cent of oxygen Circ circulation of air coal mines combustible material decidedly dangerous deficient in oxygen dioxide and nitrogen dry-bulb temperatures efficiency electric arc explosive gas extinguished fire hazards flame safety lamp found in metal gas mask GASES FOUND gases high GASES IN METAL Gilpin County Harrington high in carbon hydrogen sulphide ignitions of methane inflammable inhaled Investigations killed metal mines metal-mine blasting metal-mine fires miners numerous open light oxides of nitrogen oxygen breathing apparatus oxygen content palladium chloride percentage of carbon poisonous gases PRECAUTIONS AGAINST GASES Pyrotannic Acid Method quantities relative humidity Rept respiratory protection result rock Rock-Strata Gases Sayers SCOTT TURNER shallow shafts strata sulphur dioxide sulphur gases Tech tested tion tunnel type N gas underground United States Bureau unventilated winze workers Yant
Populære avsnitt
Side 5 - ... are a result of the action of atmospheric air and mine water upon the sulphides and carbonates in the fissured rock.
Side 9 - Some of the heaviest losses of life in metal-mine fires have resulted from the burning of less than a railroad freight car or only a few cords of timber.