Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 7-33
... 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 , 1932 7. Shaft - Sinking Practices and Costs . E. D. Gardner and J. F. Johnson ...
... 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 , 1932 7. Shaft - Sinking Practices and Costs . E. D. Gardner and J. F. Johnson ...
Halaman 10-83
... shaft in orebody vs inclined shaft in footwall . Inclined shafts for large tonnages must be straight . Gradual changes in dip are allowable , but if numerous or sudden they increase hoisting cost and decrease shaft capacity by limiting ...
... shaft in orebody vs inclined shaft in footwall . Inclined shafts for large tonnages must be straight . Gradual changes in dip are allowable , but if numerous or sudden they increase hoisting cost and decrease shaft capacity by limiting ...
Halaman 10-84
... shaft . A typical example requiring a decision between the two kinds of shaft arises in case of a pitching vein , as in Fig 102. An inclined shaft is generally sunk in footwall ( AB ) . Vert shaft may be at CD or AE ; either location ...
... shaft . A typical example requiring a decision between the two kinds of shaft arises in case of a pitching vein , as in Fig 102. An inclined shaft is generally sunk in footwall ( AB ) . Vert shaft may be at CD or AE ; either location ...
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