Failure mechanics of cable bolt systems

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Mots clés : Rock mechanics;Cable bolts;Bond stress;Grout;Bond failure;Internal friction
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Publication: CIM Bulletin
Auteur(s): P.E. WEIDMARK
Numéro: 856
Volume: 76
Année: 1983
Texte
Sommaire: In this study, the authors investigated the stabilities of slopes cut predominantly into Trenton limestone in a large quarry in the Montreal region. Analyses of the bench and pit walls indicated that small-scale toppling, ravelling, and wedge failures are the most likely modes of instabilities. Because most of the joints dip steeply, however, the conclusion was made that relatively high walls could probably be justified.
The field investigations were supplemented with the determinations of...
Publication: CIM Bulletin
Auteur(s): JOHN E. UDD, MARC C. BETOURNAY
Mots clés: Rock mechanics, slope stability, Trenton limestone, Montreal, Structural analysis, Failure analysis, Quarries, Geology.
Numéro: 856
Volume: 76
Année: 1983
Texte
Sommaire: Carbon addition in the oxide pelletizing process is a big concern at the Sidbec-Normines pelletizing plant since 1976.
Laboratory pot-grate testing carried out before the initial start-up of the Port-Cartier plant indicated that the nominal pelletizing grate capacity could be increased by fifteen per cent with a suitable carbon addition. Also an improved induration cycle offered the possibility of a significant energy reduction within the process with no adverse effect on pellet quality. A...
Publication: CIM Bulletin
Auteur(s): C. DESMEULES
Mots clés: Energy management, Energy conservation, Coke breeze, Sidbec-Normines, Fire Lake, Pelletising, Pellets.
Numéro: 856
Volume: 76
Année: 1983
Texte
Sommaire: Kidd Creek Mines primarily employs sublevel blasthole sloping for underground mining operations. During pillar recovery in No. 1 Mine and panel mining in No. 2 Mine, the free standing fill exposures may reach a height of 100 m or more. Consequently, a competent consolidated rockfill has been required to fill the mined openings.
Since 1976, a total of more than fifty slopes and pillars have been filled with over four million tonnes of backfill. Fill exposures, up to heights of 100 m, have...
Publication: CIM Bulletin
Auteur(s): T.R. YU
Mots clés: Rock mechanics, Backfill practice, Kidd Creek Mines Ltd., Blasting, Blasthole sloping, Underground mining, Aggregates, Portland cement, Ground slag.
Numéro: 856
Volume: 76
Année: 1983
Texte
Sommaire: Afton Mines Ltd. (N.P.L.) operates an 8500-tpd open-pit copper-gold mine near Kamloops, B.C. The pit is currently 480 feet deep and will reach an ultimate depth of 800 feet.
The east, south and west walls of the pit are composed of Triassic andesites (Nicola Volcanic Formation) and contemporaneous sub-volcanic intrusions of micro-syenite, micro-diorite, diorite and picrite-basait (Iron Mask Pluton). The north wall of the pit consists of Tertiary sandstones, shales and mudstones (Tranquille...
Publication: CIM Bulletin
Auteur(s): ALAN REED
Mots clés: Economic geology, Structural geology, Geostatistics, Afton Mine, Mineralization, Open-pit mining, Gold, Silver, Copper, Slope stability.
Numéro: 856
Volume: 76
Année: 1983
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