Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 10-39
... sampling depends largely upon the character of the material drilled . Diamond drills give accurate samples in hard rocks where core recovery is complete . Accurate samples are also obtainable by churn drills in fine - grained ...
... sampling depends largely upon the character of the material drilled . Diamond drills give accurate samples in hard rocks where core recovery is complete . Accurate samples are also obtainable by churn drills in fine - grained ...
Halaman 10-45
... sampling practice for churn - drill work has been developed in the porphyry copper districts , where the numerous samples taken and necessity for saving chalcocite slime make this work difficult . At NEVADA CONSOL mine , all sludge and ...
... sampling practice for churn - drill work has been developed in the porphyry copper districts , where the numerous samples taken and necessity for saving chalcocite slime make this work difficult . At NEVADA CONSOL mine , all sludge and ...
Halaman 10-46
... sampling work , sluice boxes , splitters , and tubs must be scrupulously cleaned after each sample run , to avoid salting succeeding samples . Spout Spout -30 % " Top View " 12 Openings 1 " x 51⁄2 " Discard % of total sludge ...
... sampling work , sluice boxes , splitters , and tubs must be scrupulously cleaned after each sample run , to avoid salting succeeding samples . Spout Spout -30 % " Top View " 12 Openings 1 " x 51⁄2 " Discard % of total sludge ...
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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