Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 1-6
... sight recognition . Minerals with non- metallic luster often vary greatly in color . The color is most safely obtained on a fresh surface . The streak is usually obtained by rubbing the mineral on a smooth but not glazed white or black ...
... sight recognition . Minerals with non- metallic luster often vary greatly in color . The color is most safely obtained on a fresh surface . The streak is usually obtained by rubbing the mineral on a smooth but not glazed white or black ...
Halaman 10-29
... sight is perpendicular to the dip ( vert angle complement of dip angle ) . Deflected line of collimation then revolves in a plane parallel to and slightly to one side of plane of vein . If the ground is sighted , each stake will be ...
... sight is perpendicular to the dip ( vert angle complement of dip angle ) . Deflected line of collimation then revolves in a plane parallel to and slightly to one side of plane of vein . If the ground is sighted , each stake will be ...
Halaman 9-40
... sight " 25-18 Ores , adaptability to cyanidation 33-06 magmatic 10-08 resistivity of 10 - A - 36 Oreshoots 10-15 effect on development 10-85 Organization for fire - fighting 23-51 of a large mine 20-03 for mine rescue 23-59 for mine ...
... sight " 25-18 Ores , adaptability to cyanidation 33-06 magmatic 10-08 resistivity of 10 - A - 36 Oreshoots 10-15 effect on development 10-85 Organization for fire - fighting 23-51 of a large mine 20-03 for mine rescue 23-59 for mine ...
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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