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Showing: 1 to 10 of 78 matches for "hardrock shaft sinking"  Page   1   2   3   4   5   6   7   8 TITLE Mining Technology In 1964 – Underground Mining  SUMMARY ... In California a shaft sinking machine has been developed which combines drilling and muck ... A hardrock "Mole", a drift-boring machine, has been developed and is ... AUTHOR Mann, C. David PUBLISHED 1965 TITLE Planning for Access to the Deep Copper Orebodies at Mount Isa Mines Limited  SUMMARY ... future trends in working hours and the availability of skilled hardrock miners ... must be completed on 18, 19, 20 and 21 Levels prior to shaft sinking in February ... AUTHOR Slater R PUBLISHED 1982 TITLE Mine Planning For Maximum Production  SUMMARY ... Powder usage is low, (approximately 1 1b.lton) compared to hardrock operations. ... Shaft sinking by drilling has already been discussed. ... AUTHOR Head, Milton C. ; Hawes, William E. ; Roland, Aulton E. PUBLISHED 1982 TITLE Dynatec’s Long Round Technology Improves Shaft Development  SUMMARY ... Despite advances being made in hardrock boring and other, more exotic techniques ... improvements through the use of long rounds in shaft sinking and lateral de ... AUTHOR Dengler, W. R. PUBLISHED 1993 TITLE Conventional Small Drilling Equipment  SUMMARY ... They also are used for shaft sinking. ... The larger machines are applied to hardrock formations and in applications where drilling speed is a primary consideration ... AUTHOR Kurt, E. H. PUBLISHED 1982 TITLE Instrumentation and Preliminary Analysis of a 6,200-Ft Deep Circular Shaft in Northern Idaho  SUMMARY ... Shaft steel and services were advanced concurrent with sinking. ... The shaft sinking contractor achieved overall average advance rates of 1.0 ... AUTHOR Board, M. P. ; Reus, M. J. PUBLISHED 1984 TITLE Rapid Excavation - A Perpetual Goal  SUMMARY ... techniques would not be complete if advancements in driving inclined arid vertical hardrock openings were not considered. Formerly, shaft sinking for mine ... AUTHOR Garfield, Lawrence A. PUBLISHED 1971 TITLE Bureau of Mines Research to Improve Underground Metal/Nonmeta1 Mining Technology  SUMMARY ... a unique shaft sinking system that uses an impact hammer for rock fragmentation, and a leu-Profle portable crusher for utt- derground hard-rock applications. ... AUTHOR Davis, L. L. PUBLISHED 1982 TITLE Mine Development And Rock Mechanics Monitoring at the White River Shale Project  SUMMARY ... Mobilization for shaft sinking began in the winter of 1982 and continued through the spring of 1983 with construction of the surface facilities , hoist ... AUTHOR Page, Lowell B. PUBLISHED 1984 TITLE Bureau Of Mines Research To Improve Underground Metal/Nonmetal Mining Technology  SUMMARY ... In particular, two innovative and promising concepts currently under development are described: a unique shaft sinking systm that uses an impact hammer for ... AUTHOR Davis, Lawrence L. PUBLISHED 1979 Showing: 1 to 10 of 78 matches for "hardrock shaft sinking"  Page   1   2   3   4   5   6   7   8 Search Again