Coal mining at the Smoky River minesite, Mclntyre Mines Limited

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Mots clés : Coal Mining;Open-pit mining;Underground mining;Smoky River Mine;Ventilation;Productivity;Reclamation
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Publication: CIM Bulletin
Auteur(s): P. S. DALY
Numéro: 829
Volume: 74
Année: 1981
Texte
Publication: CIM Bulletin
Auteur(s): M.W. MIKHAIL, LC. BIRD, N.T.L LANDGREN
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: Description des études qui ont conduit à la conception specifique du système de drainage de la mine à ciel ouvert. Les approches différentes sont examinées ainsi que la valeur du systeme recommandé.
Publication: CIM Bulletin
Auteur(s): A. LIARD, G. SAURIOL, H. SOMMELET
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: This paper is based on work done by the authors in a study of the structural features at a quarry excavated in Chazy limestone on the Island of Montreal. Observations on failures on the quarry walls and benches were recorded, and back-analyses of small-scale failures were carried out, thus enabling an assessment to be made of the in-situ strength properties of the rock. Using this information, and data from shear tests in the laboratory, the authors made an analysis of the stability of the...
Publication: CIM Bulletin
Auteur(s): JOHN E. UDD, PETER LEINBERGER, ROMAN KOZARYCZ
Mots clés: Open-pit mining, Quarrying, Slope stability, Chazy limestone, Montreal, Rock mechanics, Structural geology, Shear testing.
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: There is a considerable resource of data for spherical charge cratering, both as single  charges  and  in   row-of-charge geometry. The data are, however, based on cratering performance to a single free planar surface.In practice, the more common circumstance involves an angular surface geometry, such as occurs at the toe of a bench or the wall of aslope. It is for the purpose of investigating this circumstance that the described test work was conducted.The test...
Publication: CIM Bulletin
Auteur(s): R.R. MacLACHLAN, D.E. SALMAN, R.J. BARCLAY
Mots clés: Open-pit mining, Cratering, Spherical charge cratering, Blasting, Benching, Rock mechanics, underground mining.
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: The objectives of the Wabush Mines tailings stabilization program are to control dust lift-off and to rehabilitate the disposal area. The evolution of the program started with test plots in 1970, these being continued and expanded upon through 1974. In 1976, a 35-acre vegetation field trial was attempted and failed, part of the failure being attributed to lack of adequate equipment. Subsequently, equipment was purchased and during the summer of 1979-80 extensive areas were treated. The...
Publication: CIM Bulletin
Auteur(s): EDGAR L HORNER
Mots clés: Open-pit mining, Tailings disposal, Reclamation, Vegetation, Wabush Mines, Soils, Dust control.
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: This paper briefly outlines the characteristics which should be considered in assessing the economics of mineral exploration, and illustrates such an assessment by using data from the Canadian base metal sector. Implications for the sector are found to include the following:

base metal exploration has the potential to create a substantial amount of new wealth;
 investment incentive for exploration under current conditions is not unattractive over-all;
because of existing...
Publication: CIM Bulletin
Auteur(s): BRIAN W. MACKENZIE
Mots clés: Mineral economics, Exploration, Base metal exploration, Investment, Taxation, Value, Budgets, Government policy, Information exchange.
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: Originally intended to be implemented in 1977, but actually introduced effective May 6, 1974, the earned depletion regulations have been substantially refined and modified since their appearance on the Canadian tax scene, so that this important legislation now consists of a highly complicated set of rules which even the most astute follower of tax law has considerable difficulty sorting out!This month, Tax Notes attempts to cut through this bewildering array of regulations, in reviewing the...
Publication: CIM Bulletin
Auteur(s): ROBERT B. PARSONS
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: Sherritt's zinc pressure leaching process converts zinc sulphide concentrates directly to zinc sulphate solutions and elemental sulphur. Thus, one pressure process step replaces both the roasting and leaching operations of the conventional roast-leach route. In addition, high single-pass extractions eliminate the need for residue treatments to recover unleached zinc. Because pressure leaching produces elemental sulphur, rather than sulphur dioxide, acid plants and smoke stacks are not...
Publication: CIM Bulletin
Auteur(s): E.G. PARKER
Mots clés: Leaching, Pressure leaching, Oxidative pressure leaching, Zinc pressure leaching, Extractive metallurgy, Sulphur separation, Flotation, Trail Operations, Cominco Ltd., Sherritt Gordon Mines Ltd.
Numéro: 829
Volume: 74
Année: 1981
Texte
Sommaire: A stream sediment geochemical survey covering an area of 13,000 sq. km near Churchill Falls, Labrador, was conducted for Brinex (British Newfoundland Explorations Ltd.) prior to partial flooding by the Churchill Falls power project. Stream sediments (minus 80-mesh) were analyzed for Cu, Pb, Zn, Ni, Ag, Mo, UandMn, and the heavy mineral, nonmagnetic fraction (minus 60-mesh)for Cu, Pb, Zn, Ni, Ag, Mo, Ba andMn. A binocular examination of the concentrates for sulphides and pyrope garnet was done...
Publication: CIM Bulletin
Auteur(s): JOHN E. CALLAHAN
Mots clés: Exploration, Geochemical exploration, Stream-sediment surveys, Heavy-mineral concentrates, Churchill Falls area, Labrador, Copper, Lead, Zinc, Silver, Nickel, Manganese, Molybdenum, Uranium, Barium.
Numéro: 829
Volume: 74
Année: 1981
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