Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 7-16
... transit at shaft collar and sighting a target at the bottom ( or some intermediate ) set , with target and telescope offset at fixed distances from sill and end plate . New timbering is often alined with spirit level , carpenter's ...
... transit at shaft collar and sighting a target at the bottom ( or some intermediate ) set , with target and telescope offset at fixed distances from sill and end plate . New timbering is often alined with spirit level , carpenter's ...
Halaman 10-29
... transit on each stake , and cross - section to find outcrop , as for grade stakes in railroad work . This method involves much calculation , which can be reduced by using slope - stake diagrams . ( c ) Use transit with Shattuck solar ...
... transit on each stake , and cross - section to find outcrop , as for grade stakes in railroad work . This method involves much calculation , which can be reduced by using slope - stake diagrams . ( c ) Use transit with Shattuck solar ...
Halaman 9-57
... transit 18-09 Top - slice mines , ventilating 14-21 mining 10-297 et seq Top - slicing , summary 10-324 Topography affecting mine development 10-85 mine openings 10-90 , subsidence 10-527 effect on ore enrichment underground 18-15 ...
... transit 18-09 Top - slice mines , ventilating 14-21 mining 10-297 et seq Top - slicing , summary 10-324 Topography affecting mine development 10-85 mine openings 10-90 , subsidence 10-527 effect on ore enrichment underground 18-15 ...
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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