Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 23-42
... cause , no distinction is made in Tables 23a and 24 , but the Bureau of Mines is now separating cause ignition from means of propagation . " Colliery explosion disasters from CH , and coal dust , acting together or alone , in which more ...
... cause , no distinction is made in Tables 23a and 24 , but the Bureau of Mines is now separating cause ignition from means of propagation . " Colliery explosion disasters from CH , and coal dust , acting together or alone , in which more ...
Halaman 23-49
... cause of fires in collieries is ignition of CH4 by longflame explosives ; or coal may take fire from flame of over- charged shots . In metal mines , fires were formerly caused by lighted CANDLE ENDS dropping onto timbers or inflammable ...
... cause of fires in collieries is ignition of CH4 by longflame explosives ; or coal may take fire from flame of over- charged shots . In metal mines , fires were formerly caused by lighted CANDLE ENDS dropping onto timbers or inflammable ...
Halaman 40-20
... causes little trouble ; it is regularly drawn off at the blow - off . SCALE seriously retards heat transfer , and if allowed to accumulate the heat may weaken the metal sufficiently to cause rupture . CORROSION Causes general weakening ...
... causes little trouble ; it is regularly drawn off at the blow - off . SCALE seriously retards heat transfer , and if allowed to accumulate the heat may weaken the metal sufficiently to cause rupture . CORROSION Causes general weakening ...
Isi
COMPRESSED AIR PRACTICE | 15-2 |
Appli | 15-15 |
Hydraulic Compressors | 15-22 |
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adjustment Aerial Tramway anthracite approx assay aver borax buckets Bur Mines capac carriers cars charge chute claim coal mines compressed compressor concentrate conveyer copper cost crusher crushing cu ft cupel cyanide deflection diam discharge distance drill dust elev engineer explosions feed filter fire firedamp gold hoisting horiz intercooler labor lamp less litharge loaders loading lode long ton machine mechanical metal method mill mineral motor operation pipe plant plate plumb-bob pump pyrite rock safety lamps sample screen shaft sheave short ton side silver sizes Sodium carbonate solution speed station steel stopes surface survey Table tape telescope temp tension tests timber tion tons Total towers track cable traction rope tramway Trans transit traverse underground usually vein vertical wire zinc