Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 7-4
... Sinking engines should be strongly built , of duplex type ; many lives depend on their reliability . For depths to ... sinking head- frame . A second sheave may be fastened to bottom of tripod leg nearest the hoist , to lead rope off ...
... Sinking engines should be strongly built , of duplex type ; many lives depend on their reliability . For depths to ... sinking head- frame . A second sheave may be fastened to bottom of tripod leg nearest the hoist , to lead rope off ...
Halaman 7-33
... Sinking . US Bureau of Mines , 1922 5. Present Practice in the Design and Sinking of Shafts . 6. Shaft Sinking Equipment . R. H. Kudlich . Tech Paper No 276 , R. G. Johnson . Coal Age , Sept 13 , 1923 L. Eaton . E & M Jour , Mch and Apl ...
... Sinking . US Bureau of Mines , 1922 5. Present Practice in the Design and Sinking of Shafts . 6. Shaft Sinking Equipment . R. H. Kudlich . Tech Paper No 276 , R. G. Johnson . Coal Age , Sept 13 , 1923 L. Eaton . E & M Jour , Mch and Apl ...
Halaman 8-24
... sinking itself . Asphalt grouting has been used considerably in the US , and is better than cement grouting for fissured rock where there is a large flow of water . The asphalt is pumped into the ground as a hot fluid , which solidifies ...
... sinking itself . Asphalt grouting has been used considerably in the US , and is better than cement grouting for fissured rock where there is a large flow of water . The asphalt is pumped into the ground as a hot fluid , which solidifies ...
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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