Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Resultat 1-5 av 8
Side 8
... adequate respiratory protection . High percentages of carbon dioxide and nitrogen and a low per- centage of oxygen are found almost invariably at some time or place in connection with fires in metal mines , including not only quick ...
... adequate respiratory protection . High percentages of carbon dioxide and nitrogen and a low per- centage of oxygen are found almost invariably at some time or place in connection with fires in metal mines , including not only quick ...
Side 11
... adequately by any type of gas mask ; hence , only up - to - date oxygen breathing apparatus should be worn if respiratory protection is sought . Fires involving heavily insulated electric power cables or wires also give off fumes that ...
... adequately by any type of gas mask ; hence , only up - to - date oxygen breathing apparatus should be worn if respiratory protection is sought . Fires involving heavily insulated electric power cables or wires also give off fumes that ...
Side 14
... adequate supply of water available on the surface and underground , furnished if possible through water lines extending to within 100 feet of the breasts of the various levels and drifts , with hose attachments at frequent intervals and ...
... adequate supply of water available on the surface and underground , furnished if possible through water lines extending to within 100 feet of the breasts of the various levels and drifts , with hose attachments at frequent intervals and ...
Side 15
... adequate precautions against fire in or around metal mines is the provision for adequate ventilation 16 of the mines . Efficient ventilation of metal mines con- sists in supplying at all times such volume of circulating air in working ...
... adequate precautions against fire in or around metal mines is the provision for adequate ventilation 16 of the mines . Efficient ventilation of metal mines con- sists in supplying at all times such volume of circulating air in working ...
Side 16
... adequately and render harmless any mine gases encountered . 2. Proper distribution of air to working places by such means as the driving of connections between levels ; use of doors , overcasts , bulkheads , regulators , and canvas ...
... adequately and render harmless any mine gases encountered . 2. Proper distribution of air to working places by such means as the driving of connections between levels ; use of doors , overcasts , bulkheads , regulators , and canvas ...
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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.