Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Hasil 1-3 dari 73
Halaman 3-14
... Load , cu yd .... Loading distance , ft .. Loading speed , ft per sec . Haul distance , ft . Haul speed , ft per sec .. Return distance , ft . Return speed , ft per sec .. 2 3 3731 511 800 560 11 741 1 655 822 1 352 68.4 57 35.2 44.1 ...
... Load , cu yd .... Loading distance , ft .. Loading speed , ft per sec . Haul distance , ft . Haul speed , ft per sec .. Return distance , ft . Return speed , ft per sec .. 2 3 3731 511 800 560 11 741 1 655 822 1 352 68.4 57 35.2 44.1 ...
Halaman 10-397
... Loading place Poleway Plan Loading place Poleway Broken blue ground Broken blue ground Broken blue ground Broken blue ground Loading place Loading place Loading place Mixed waste and bluet Poleway Loading place Poleway Solid blue ground ...
... Loading place Poleway Plan Loading place Poleway Broken blue ground Broken blue ground Broken blue ground Broken blue ground Loading place Loading place Loading place Mixed waste and bluet Poleway Loading place Poleway Solid blue ground ...
Halaman 11-32
... loading and dumping time . The duty varies directly as the unit load and length of tram , and inversely as the time per cycle ( Art 1 ) . Assume a 900 - lb car with plain bearings , capacity 1 800 lb , having 1.5 % loaded and 2 % empty ...
... loading and dumping time . The duty varies directly as the unit load and length of tram , and inversely as the time per cycle ( Art 1 ) . Assume a 900 - lb car with plain bearings , capacity 1 800 lb , having 1.5 % loaded and 2 % empty ...
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Istilah dan frasa umum
angle Ariz aver bench black powder blasting block bottom broken caps cars caving chalcocite chalcopyrite churn drills chutes coal copper core cost per ft cribbed cross-sec crosscuts crystals Data deposits depth diam driven dynamite excavation explosives face filled stopes floor footwall ft deep ft high ft long ft wide fuse gelatin grizzly ground hammer drills hanging wall haulage level hematite hoisting holes horiz igneous rocks inclined intervals iron jackhammers labor lagging limestone loading magnetite manway Mesabi Range method minerals mining mucking orebody pillars pipe porphyry posts powder pump pyrite pyrrhotite quartz quartzite raises rock rods samples sand schist scraper sets shift shovel shrinkage stopes side sill sinking slice sludge soft sphalerite square-set steel stope stulls sub-level sulphide surface Table thick timber tons top-slicing Total tunnel usually veins ventilation waste width