Statistical interpretation of a frequency-of-monitoring program designed for the protection of underground uranium miners from overexposure to radon daughters

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Mots clés : Mine safety;Monitoring;Underground mining;Uranium mining;Radiation;Radon daughters
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Texte
Sommaire: The paper takes its material from three peat mining and power project feasibility studies sponsored by CANMET and conducted by Montreal Engineering Company Ltd. in the years 1976 to 1980. The role which peat may play in the Canadian energy prospectus is outlined, estimated and measured fuel peat resources are tabulated, and the economic and technical feasibility of mining peat for power generation is reviewed.Recommendations are made for future work, and construction and disbursement...
Publication: CIM Bulletin
Auteur(s): I.E. TIBBETTS
Mots clés: Energy resources, Peat, Power generation, Fuels, Combustion, New Brunswick.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: The development, in Ontario, of a common industry-wide program for the development of skills for employees in underground hard-rock mining is described. This program is designed to increase the productivity of individual workers by improving their skill levels, while at the same time ensuring that employees are instructed in the requisite safety and health aspects of performing various underground tasks. The program's development through a management-labour-government tripartite approach is...
Publication: CIM Bulletin
Auteur(s): G.R. BUCKLAND
Mots clés: Underground mining, Training, Manpower, Ontario, Hardrock mining, Modular training, Safety, Occupational health.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: Western Mines Limited produces gold, silver, copper, lead and zinc from a number of Paleozoic volcanogenic deposits near Buttle Lake on Vancouver Island. The deposits were emplaced along a series of submarine linear volcanic ridges that extended for at least 6,000 metres in a northwesterly direction.Rock types mapped include: andesitic, dacitic and rhyolitic flows and volcanic breccias; detrital breccias, tuffs and hematitic silts; black and green cherts; and a variety of dykes and sills,...
Publication: CIM Bulletin
Auteur(s): R.H. SERAPHIM
Mots clés: Ore deposits, Western Mines Ltd., Myra deposit, Lynx deposit, Price deposit, Volcanogenic deposits, Sicker Group, Alteration, Mineralization, Discussion, Walker, R.R.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: Complex facilities which provide for the, collection, management and treatment of effluents emanating from the Sullivan mine and concentrator tailings were made operational in October 1979. Key features of the system are the use of upgraded tailings ponds for the storage of up to 800 million litres of metals-contaminated effluents, a treatment plant employing lime in a high-density sludge process and a sludge-impoundment facility designed for maximum long-term environmental safety. The...
Publication: CIM Bulletin
Auteur(s): W.J. KUIT
Mots clés: Environmental control, Effluent treatment, Tailings, Cominco Ltd., Water treatment plants, Lime, Flocculents, Clarifiers, Impoundment.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: A technique by which the design of a flotation circuit may be optimized is described and examples of the application of this methodology are given. Three interrelated criteria are defined and the application of these criteria to the selection of the optimum residence time for each stage of a flotation circuit is demonstrated. The criteria are:(1) Add no material to the concentrate that is lower in grade than the feed to that separation stage.(2) Maximize the difference in recovery between the...
Publication: CIM Bulletin
Auteur(s): G.E. AGAR, R. STRATTON-CRAWLEY, T.J. BRUCE
Mots clés: Mineral processing, Flotation, Locked cycle tests, Separation efficiency, Pipe ore, Copper, Nickel, Chalcopyrite.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: A computer-based drill core logging system used to examine copper mineralization hosted in volcaniclastic rocks at the Sustut deposit, in north-central British Columbia, has many advantages over conventional logging. A relatively simple format for recording geological information allows complex, but significant, geologic parameters to be recorded consistently, accurately and quickly. This allows graphical presentations and statistical interpretation of the data that lead to rapid and detailed...
Publication: CIM Bulletin
Auteur(s): D.H. WILTON, C.I. GODWIN, A.J. SINCLAIR
Mots clés: Ore deposits, Computers, Core logging, Sustut deposit, Copper deposits, Volcaniclastic rocks, Logs.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: Conventional exploration strategies identify many mineral deposits as potentially interesting, although only a few of them turn out to be of economic importance. In the context of exploration for sulphide nickel deposits in the Canadian Shield, a decisional model, based on a statistical study of parameters relative to nickel deposits as well as to barren sulphide oc-curences, has been developed.Because such geophysical variables as gravimetry, aeromagnetism and topography could be related to...
Publication: CIM Bulletin
Auteur(s): R. SIMARD
Mots clés: Exploration, Geophysical exploration, Nickel deposits, Logistic models, Geostatistics, Sampling.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: Asbestos tailings are a typical serpentine, hydrated magnesium silicate, consisting primarily ofantigorite and a few per cent of unrecovered fibrous chrysotile. Serpentine has unique thermal properties in that dehydroxylating calcination at 600 to 700°C can yield an amorphous structure in which most of the magnesia is liberated from the original bond with silica and thereby rendered chemically active. The amount of activated magnesia can be quantified by selective leaching with a weak...
Publication: CIM Bulletin
Auteur(s): M. NAGAMORI
Mots clés: Industrial minerals, Asbestos tailings, Magnesia, Serpentine, Calcination, Decomposition, Leaching.
Numéro: 824
Volume: 73
Année: 1980
Texte
Sommaire: For the last 700 years of recorded economic history, man has been subjected to alternating inflationary and deflationary patterns. Through this period of time, a severe deflationary pattern has developed approximately every 55 years, creating 12 recordable occurrences. Through the last two centuries, this severe deflationary phenomenon has come to be known as a depression. As these depressions have repeated themselves regularly, they are cyclic. This in turn leads to the question of whether...
Publication: CIM Bulletin
Auteur(s): E.A. RYCHKUN
Mots clés: Economics, Mineral economics, Cycles, Depression cycles, Prices, Growth, Decay, Markets, Elliott Wave Theory, Climate.
Numéro: 824
Volume: 73
Année: 1980
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