Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... in metal ity .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory protection against II.
... in metal ity .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory protection against II.
Side 4
... detecting explosive gas or preventing its ignition if it should be encountered . HIGH - NITROGEN OR CARBON DIOXIDE AND LOW - OXYGEN GASES Gases high in carbon dioxide or nitrogen , or both , and low in oxygen are likely to be found in ...
... detecting explosive gas or preventing its ignition if it should be encountered . HIGH - NITROGEN OR CARBON DIOXIDE AND LOW - OXYGEN GASES Gases high in carbon dioxide or nitrogen , or both , and low in oxygen are likely to be found in ...
Side 12
... detected ventilation should be improved at once . Several instances are on record of hydrogen sulphide filtering through sands and muds in tunneling and shaft - sinking operations , overcoming the workers . Numerous fatalities in ...
... detected ventilation should be improved at once . Several instances are on record of hydrogen sulphide filtering through sands and muds in tunneling and shaft - sinking operations , overcoming the workers . Numerous fatalities in ...
Side 16
... point , does not appear to be harmful to health , comfort , or efficiency until this temperature is above 75 ° F .; if enough move- DETECTION OF GASES 17 ment is supplied , high relative 16 GASES THAT OCCUR IN METAL MINES.
... point , does not appear to be harmful to health , comfort , or efficiency until this temperature is above 75 ° F .; if enough move- DETECTION OF GASES 17 ment is supplied , high relative 16 GASES THAT OCCUR IN METAL MINES.
Side 17
... DETECTION OF GASES The detection 21 and quantitative determination of mine gases have been described in detail in various publications referred to in footnotes . 18 Sayers , R. R. , and Harrington , D. , A Preliminary Study of the ...
... DETECTION OF GASES The detection 21 and quantitative determination of mine gases have been described in detail in various publications referred to in footnotes . 18 Sayers , R. R. , and Harrington , D. , A Preliminary Study of 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.