CANMET - university programs in mining innovation

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Publication: CIM Bulletin
Auteur(s): Jozef S. Stachulak
Mots clés: Safety, Fire warning systems, Combustion detectors, Underground mining.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: In recent years much work has been done to examine alternate underground backfill support systems with the objectives of improving ground support and reducing mining costs. This report deals with the work conducted at Placer Dome Inc. 's Dome Mine to develop a high density backfill system, taking advantage of the unique properties of this fill material, to address a backlog of large open slopes to sustain stable minewide ground conditions for future generations of Dome miners.
Publication: CIM Bulletin
Auteur(s): R.J. Perry, D.L. Churcher
Mots clés: Underground mining, Backfill, Support systems.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: When two discontinuities form a tetrahedral wedge in a rock slope, a factor of safety for the wedge can be simply calculated (if motion is driven only by gravity and resisted only by friction) from plots of the normals to discontinuities on an overlay of a polar, equal-area spherical projection to which the great circles of a similar equatorial projection have been added.
Publication: CIM Bulletin
Auteur(s): D.M. Cruden
Mots clés: Rock mechanics, Slope analysis, Rock wedge, Graphic methods.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: A study, underway since 1987, tries to evaluate factors affecting mines' productivity. Information has been collected from seven underground mines in Quebec and this paper shows preliminary results from one. In particular, it shows how a combination of multiple regression analysis, mathematical programming and a set of realistic mine constraints can be used for a particular application of mine planning. More specifically, the paper shows a parallel between maximizing production of tons of...
Publication: CIM Bulletin
Auteur(s): M. Laflamme, J.L. Collins
Mots clés: Underground mining, Explosives, Regression analyses.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: The need to continually improve efficiency and lower costs in mining operations is of paramount importance to all concerned in the industry. Mining operations are constantly testing new methods and equipment in order to lower costs and improve productivity. Equipment suppliers strive to fulfill the demands of the mines through improved design and innovative ideas for productivity increases. In some cases, however, an increase in productivity does not require new equipment design, but rather...
Publication: CIM Bulletin
Auteur(s): Peter Larsen, Richard Cyr, William Quesnel
Mots clés: Drilling methods, Underground mining, Equipment, Ground support.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: Test work was carried out to investigate the thermal response of loose and solid rock under varying environmental conditions. The primary interest was to develop a technique that could be used to increase the thermal variation between loose and solid rock for better detectability of loose rock underground with a thermal imaging infrared scanner.
A variety of thermal enhancement methods were evaluated both in the laboratory and in the mine environment. A ir temperature variation created by the...
Publication: CIM Bulletin
Auteur(s): T.R. Yu, J.G. Henning, J.E. Croxall
Mots clés: Underground mining, Infrared thermography, Thermal imaging.
Numéro: 937
Volume: 83
Année: 1990
Texte
Sommaire: Disseminated hypogene sulphide mineralization in the Lake-shore porphyry copper deposit (also called the Cyprus-Casa Grande deposit) of Arizona occurs in both a granodiorite stock and associated volcanic rocks. Structural development and vein paragenesis at Lakeshore are similar to other Laramide porphyry copper deposits of the southwestern U.S. Two major structural trends are present: intrusive contacts, copper-bearing potassic alteration veins and major post-mineralization Basin-and-Range...
Publication: CIM Bulletin
Auteur(s): Holly L.O. Huyck
Mots clés: Mineralization, Copper deposits, Cyprus-Casa Grande deposit, Lakeshore deposit.
Numéro: 937
Volume: 83
Année: 1990
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