Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... Gases possible in metal mines_ Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work ... found in metal mines_ Fire precautions .. Recommendations_ Ventilation___ Sulphur gases in metal mines and tunnels ...
... Gases possible in metal mines_ Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work ... found in metal mines_ Fire precautions .. Recommendations_ Ventilation___ Sulphur gases in metal mines and tunnels ...
Side 1
... gases than do the coal mines . Often the gases in metal mines are as dangerous as the gases likely to be found in coal mines , and sometimes are even more deadly . A coal mine is more likely to contain methane than a metal mine . In ...
... gases than do the coal mines . Often the gases in metal mines are as dangerous as the gases likely to be found in coal mines , and sometimes are even more deadly . A coal mine is more likely to contain methane than a metal mine . In ...
Side 2
... found in metal mines , the effect of gas occurrence is often accentuated by ... found in conjunction with or close to the gold- bearing measures , some rather ... GASES THAT OCCUR IN METAL MINES Methane or hydrogen in metal mines or tunnels.
... found in metal mines , the effect of gas occurrence is often accentuated by ... found in conjunction with or close to the gold- bearing measures , some rather ... GASES THAT OCCUR IN METAL MINES Methane or hydrogen in metal mines or tunnels.
Side 3
... found also in at least one iron ore mine in Alabama and during some quick- silver mining in California . Methane ... gases coming out of drill holes in South African gold mines and in a potash mine in New Mexico ; this gas also has been found ...
... found also in at least one iron ore mine in Alabama and during some quick- silver mining in California . Methane ... gases coming out of drill holes in South African gold mines and in a potash mine in New Mexico ; this gas also has been found ...
Side 4
... found to contain appreciable percentages of methane . 3. In 1914 , while ... found to contain appreciable amounts of methane , which was seeping into it from the surrounding sedimentary strata ... carbon dioxide and low-oxygen gases--
... found to contain appreciable percentages of methane . 3. In 1914 , while ... found to contain appreciable amounts of methane , which was seeping into it from the surrounding sedimentary strata ... carbon dioxide and low-oxygen gases--
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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.