Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
Dari dalam buku
Hasil 1-3 dari 99
Halaman 1-6
... mineral is dependent upon its refractive power , its transparency , and its structure . It may be called the kind of brilliancy or shine of the mineral . In determinative work minerals are broadly divided into Metallic and Non ...
... mineral is dependent upon its refractive power , its transparency , and its structure . It may be called the kind of brilliancy or shine of the mineral . In determinative work minerals are broadly divided into Metallic and Non ...
Halaman 1-10
... MINERALS 9. MINERALS OF ROCKS AND VEINS Associates . Most minerals are found under a variety of conditions , and with different groups of associates . The most probable associates of any mineral in any particular occurrence are : 1. The ...
... MINERALS 9. MINERALS OF ROCKS AND VEINS Associates . Most minerals are found under a variety of conditions , and with different groups of associates . The most probable associates of any mineral in any particular occurrence are : 1. The ...
Halaman 10-6
... mineral deposits and their formation . Mineral deposits are localized concentrations of special substances of the earth's crust ; some are of common rock - making minerals . Of the 1 400 mineral species , about 30 are common rock - forming ...
... mineral deposits and their formation . Mineral deposits are localized concentrations of special substances of the earth's crust ; some are of common rock - making minerals . Of the 1 400 mineral species , about 30 are common rock - forming ...
Edisi yang lain - Lihat semua
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