Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 6-15
... MUCKING EQUIPMENT Hand mucking requires no special comment . Some hand work is necessary even with mechanical loading , for cleaning up , handling fly rock , and , where drilling and mucking go on simultaneously , shoveling back from ...
... MUCKING EQUIPMENT Hand mucking requires no special comment . Some hand work is necessary even with mechanical loading , for cleaning up , handling fly rock , and , where drilling and mucking go on simultaneously , shoveling back from ...
Halaman 7-5
... mucking . It is usual with hand drilling and hammer drills , both of which can be adapted to local variations in the rock and therefore tend toward a flexible drilling schedule . Shaft raising , and breaking ground by moiling present ...
... mucking . It is usual with hand drilling and hammer drills , both of which can be adapted to local variations in the rock and therefore tend toward a flexible drilling schedule . Shaft raising , and breaking ground by moiling present ...
Halaman 10-106
... mucking . Inclusion of timbering depends on strength of ground . Track - laying and extension of air and water lines must be fitted into the routine in a way to avoid delay and interference . Number of drills used depends on size of ...
... mucking . Inclusion of timbering depends on strength of ground . Track - laying and extension of air and water lines must be fitted into the routine in a way to avoid delay and interference . Number of drills used depends on size of ...
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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