Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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... METAL MINES1 By D. HARRINGTON 2. TH ارنگ است 95816 40.347 Nevada_ Metal - mine and coal - mine at- mospheres . Gases possible in metal mines_ Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work .. High ...
... METAL MINES1 By D. HARRINGTON 2. TH ارنگ است 95816 40.347 Nevada_ Metal - mine and coal - mine at- mospheres . Gases possible in metal mines_ Methane or hydrogen in metal mines or tunnels .. Gas explosions in tunnel work .. High ...
Side 1
... METAL - MINE AND COAL - MINE ATMOSPHERES 66 When the word gas " is mentioned in connection with mining almost invariably it is inferred that the explosive gas , methane ... Metal-mine and coal-mine mospheres Gases possible in metal mines_.
... METAL - MINE AND COAL - MINE ATMOSPHERES 66 When the word gas " is mentioned in connection with mining almost invariably it is inferred that the explosive gas , methane ... Metal-mine and coal-mine mospheres Gases possible in metal mines_.
Side 2
ings where metal - mine blasting is done and the inefficient ventilation of the ordinary metal mine . In most metal mines large quantities of dynamite , fuse , and detona- tors are stored underground ; when a fire occurs in an ...
ings where metal - mine blasting is done and the inefficient ventilation of the ordinary metal mine . In most metal mines large quantities of dynamite , fuse , and detona- tors are stored underground ; when a fire occurs in an ...
Side 3
... mines in Oklahoma and in gilsonite mines in Utah . In fighting partly sealed metal - mine fires of long standing methane has been found , even when the entire region consisted of igneous rock and no sedimentary strata were present ...
... mines in Oklahoma and in gilsonite mines in Utah . In fighting partly sealed metal - mine fires of long standing methane has been found , even when the entire region consisted of igneous rock and no sedimentary strata were present ...
Side 4
... Metal - Mine Ventilation During 1930 : Inf . Circ . 6469 , Bureau of Mines , May , 1931 , 17 pp . HIGH - NITROGEN AND LOW - OXYGEN GASES 5 are 4 GASES THAT OCCUR IN METAL MINES High-nitrogen or carbon dioxide and low-oxygen gases--
... Metal - Mine Ventilation During 1930 : Inf . Circ . 6469 , Bureau of Mines , May , 1931 , 17 pp . HIGH - NITROGEN AND LOW - OXYGEN GASES 5 are 4 GASES THAT OCCUR IN METAL MINES High-nitrogen or carbon dioxide and low-oxygen gases--
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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.