Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 9
... shows that the elements causing the 3 functions do not produce different types of anomalies , but only different intensities . Unless the form of the body is known , correct interpretation is difficult . Fig 17 shows the magnetic ...
... shows that the elements causing the 3 functions do not produce different types of anomalies , but only different intensities . Unless the form of the body is known , correct interpretation is difficult . Fig 17 shows the magnetic ...
Halaman 20
... shows a theoretic log . Water and oil sands show considerable penetration of mud ; shale and limestone do not . The log of an oil well shows low resistivity for sands containing saline water and high resistivity for sands impregnated ...
... shows a theoretic log . Water and oil sands show considerable penetration of mud ; shale and limestone do not . The log of an oil well shows low resistivity for sands containing saline water and high resistivity for sands impregnated ...
Halaman 12-104
... shows stops for a self - dumping cage . For ordinary cages , the horns are often operated by a lever at corner of ... shows a common form , installed at each shaft station . Cage is supported at its corners by 4 fingers a , pivoted at b ...
... shows stops for a self - dumping cage . For ordinary cages , the horns are often operated by a lever at corner of ... shows a common form , installed at each shaft station . Cage is supported at its corners by 4 fingers a , pivoted at b ...
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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