Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... Rock - strata gases- Utah ... Other localities . Gases in timbered mines .. Properties of gases- Nitrogen ____ Carbon dioxide . Oxygen .. Methane Hydrogen sulphide_ Sulphur dioxide .. Carbon monoxide . Oxides of nitrogen_ Precautions ...
... Rock - strata gases- Utah ... Other localities . Gases in timbered mines .. Properties of gases- Nitrogen ____ Carbon dioxide . Oxygen .. Methane Hydrogen sulphide_ Sulphur dioxide .. Carbon monoxide . Oxides of nitrogen_ Precautions ...
Side 2
... rock from sealed or partly sealed mine fires , or to some form of oxidation or other chemical reaction . Not infrequently the gas condition or the high- temperature condition is complicated by the intrusion of finely divided dusts from ...
... rock from sealed or partly sealed mine fires , or to some form of oxidation or other chemical reaction . Not infrequently the gas condition or the high- temperature condition is complicated by the intrusion of finely divided dusts from ...
Side 3
... rock and no sedimentary strata were present ; undoubtedly it comes from some high - temperature reactions between the timber in the fire area and the water introduced to fight the fire . Methane has been found in limestone mines or ...
... rock and no sedimentary strata were present ; undoubtedly it comes from some high - temperature reactions between the timber in the fire area and the water introduced to fight the fire . Methane has been found in limestone mines or ...
Side 5
... rock formation of the region . Gases that would extinguish a carbide lamp and have distinctive odors have been found in parts of the mine for years , occurring in greater quantity during the summer months . About 1,700 feet from the ...
... rock formation of the region . Gases that would extinguish a carbide lamp and have distinctive odors have been found in parts of the mine for years , occurring in greater quantity during the summer months . About 1,700 feet from the ...
Side 6
... rock are raised . Simi- lar systems have been used in drifts in which gases were encountered ; one or more bulkheads with doors were erected at points near the mouth of the drift , and a fan or injector was installed to maintain the ...
... rock are raised . Simi- lar systems have been used in drifts in which gases were encountered ; one or more bulkheads with doors were erected at points near the mouth of the drift , and a fan or injector was installed to maintain the ...
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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.