Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 21-4
... produced from development work , tons .. Ore produced from stopes , tons .. 34 699 31 548 232 168 299 001 Not given 415 786 Total tons of ore produced , all mines .. 266 867 330 549 415 786 Average grade of ore from development . $ 25 ...
... produced from development work , tons .. Ore produced from stopes , tons .. 34 699 31 548 232 168 299 001 Not given 415 786 Total tons of ore produced , all mines .. 266 867 330 549 415 786 Average grade of ore from development . $ 25 ...
Halaman 23-8
... produced when dynamite is burned instead of detonated . Also , in blasting coal with black pow- der , the products differ from those in the testing gage ; more combustible gas is produced by pres- ence of carbon and hydro - carbons of ...
... produced when dynamite is burned instead of detonated . Also , in blasting coal with black pow- der , the products differ from those in the testing gage ; more combustible gas is produced by pres- ence of carbon and hydro - carbons of ...
Halaman 44-5
... produced has been returned for the same purpose ( as in Colombia , Perú and Sumatra , operated by subsidiaries of Standard Oil Co of N J ) . Much oil in the Talang Akar- Pendopo field , Sumatra , has been produced by the press ...
... produced has been returned for the same purpose ( as in Colombia , Perú and Sumatra , operated by subsidiaries of Standard Oil Co of N J ) . Much oil in the Talang Akar- Pendopo field , Sumatra , has been produced by the press ...
Isi
COMPRESSED AIR PRACTICE | 15-2 |
Appli | 15-15 |
Hydraulic Compressors | 15-22 |
Hak Cipta | |
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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