Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 8
... Shift - boss Report MINE Shaft No 4 Working Mach place shifts DATE Dec 1 , 1926 Timber SHIFT Day Class No H P10 X 108 X 102 X 124 x 68 x 86 x 84 x 43 x 63 X 12 Stope 401 2 30 Round Explosives Labor Hoisting Miners Shovelers Trammers ...
... Shift - boss Report MINE Shaft No 4 Working Mach place shifts DATE Dec 1 , 1926 Timber SHIFT Day Class No H P10 X 108 X 102 X 124 x 68 x 86 x 84 x 43 x 63 X 12 Stope 401 2 30 Round Explosives Labor Hoisting Miners Shovelers Trammers ...
Halaman 27-21
... shift time . 420 100.00 Total shift time . 420 100.00 Table 15. Time Study after Installation Table 16. Loader on Development Operation Minutes Percent Direct cost Direct Operation Minutes Percent cost Loading .. 172 40.95 $ 43.62 ...
... shift time . 420 100.00 Total shift time . 420 100.00 Table 15. Time Study after Installation Table 16. Loader on Development Operation Minutes Percent Direct cost Direct Operation Minutes Percent cost Loading .. 172 40.95 $ 43.62 ...
Halaman 27-22
... shift started , 7.30 a m ; aver time shift ended , 3.00 pm ; aver tons per car , 4.802 ; aver cars loaded per shift , 96.312 ; aver tons per shift , 462.5 . Delays , due to : ( a ) cutting , drilling , blasting , track and timbering ...
... shift started , 7.30 a m ; aver time shift ended , 3.00 pm ; aver tons per car , 4.802 ; aver cars loaded per shift , 96.312 ; aver tons per shift , 462.5 . Delays , due to : ( a ) cutting , drilling , blasting , track and timbering ...
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