Cape Breton Development Corporation: an overview

Mots clés : Coal Mining;Cape Breton Development Corporation;Underground mining;Mining operations;Phalen colliery;Lingan colliery;Prince colliery;Carbogel
Accés complet à Document technique
Version PDF pour 20,00 $
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 9
Texte
Sommaire: On the basis of differences derived from genetic, descriptive, and grade-tonnage data, graphite deposits are classified here into three deposit types: disseminated flake, amorphous (microcrystal-line), or graphite veins. Descriptive models have been constructed for each of these deposit types, and grade-tonnage models are constructed for disseminated flake and amorphous deposit types. Grade and tonnage data are used also to construct grade-tonnage models that assist in predicting the size and...
Publication: CIM Bulletin
Auteur(s): David M. Sutphin, James D. Bliss
Mots clés: Graphite deposits, Industrial minerals, Descriptive models, Grade-tonnage models, Amorphous deposits, Disseminated flake deposits.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: Effective January 1, 1990, mines in British Columbia are subject to a new provincial mining tax statute, the Mineral Tax Act. Under this Act, minesaresub-ject to a two-tier tax system, with a minimum tax payable on "net current proceeds" and a higher tax paid on net income. For many mines, the present value of tax paid under the new rules should be comparable to the amount paid under the old rules. Earlier cash payments could pose difficulties, particularly for smaller mines, but...
Publication: CIM Bulletin
Auteur(s): Robert B. Parsons
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: Blast design is becoming more and more important as industrial limitations change in regard to economical and physical restraints. Certainly there are ways to alter the nature of the blast by using different explosives, various hole sizes and modifying the timing and charging details. However, it is not possible to alter the fabric of the rock mass. Therefore, it is necessary to learn more about the rock mass and its role in the blast design, and the resulting fragmentation. The major...
Publication: CIM Bulletin
Auteur(s): Brian C. Maynard
Mots clés: Rock mechanics, Blast design, Fragmentation, Modelling, Scanline survey, Kuz-Ram model.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: Increased efforts to improve mine safety have led to various successful forms of ground control in Canadian underground mines. At Inco Limited's T-3 Mine in Thompson, Manitoba, a perimeter blasting method has been implemented in jumbo drilled development headings.
The technique utilizes an increased number of perimeter blast holes in the drill pattern while decreasing the linear charge density of explosives in any individual perimeter hole. The decrease in perimeter charge density means less...
Publication: CIM Bulletin
Auteur(s): M. Sutherland
Mots clés: Underground mining, Blasting, Mine safety, Safety, Perimeter blasting.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: This geological engineering method is based on four main characteristics of mineral properties, viz; location: inclusion of valuable mineralization; inclusion of geophysical and/or geo-chemical targets; and inclusion of geological targets. These are subdivided into a total of '19 subcategories, which are used to determine the value of the property.
The nineteen subcategories are prioritized and assigned relative value factors from 1.3 to 10. Value of each mineral claim-unit is determined by...
Publication: CIM Bulletin
Auteur(s): Lionel C. Kilburn
Mots clés: Property valuation, Exploration, Economics.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: Corrosion of underground support measures constitutes a concern to industry in both safety and economic terms. It also represents a potential market for corrosion resistant materials such as stainless steel.
In order to assess the market potential for a stainless steel friction rock bolt, a review of current corrosion processes and remedial or preventative measures in the underground environment was undertaken. This was supplemented by distribution to industry of a detailed questionnaire,...
Publication: CIM Bulletin
Auteur(s): P.K. Kaiser, S.M. Maloney, S.P. Singh
Mots clés: Rock mechanics, Ground control, Rock bolting, Corrosion.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: The Phalen Colliery, the Cape Breton Development Corporation's flagship, is now producing thermal and metallurgical grade coal in Eastern Canada's Sydney Coal Field. The colliery is a drift mine operating under the waters of the Atlantic Ocean. Improved mechanization, including a 2200 tonne per hour cable conveyor, and the introduction of modern retreat longwall mining methods as part of the Phalen concept are now paying off in better productivity and low operating costs. Geological condition...
Publication: CIM Bulletin
Auteur(s): George R. White, Phalen Colliery
Mots clés: Coal mining, Phalen Colliery, Cape Breton Development Corporation, Sydney coal field.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: Roof bolts are the primary means of roof support in underground mines in the United States. Presently, post installation loads are measured on about 10% of the expansion anchor and combination bolts by using standard torque wrenches that Unit the accuracy of the measurements to about ±30%. No system has been available for measuring the loads generated on full-column resin grouted bolts. Mine roof bolts are long, slender, non-uniformly sized, roughly forged, and placed in a corrosive...
Publication: CIM Bulletin
Auteur(s): S.C. Tadolini
Mots clés: Rock mechanics, Roof bolting, Ultrasonic technology, Research and development.
Numéro: 940
Volume: 83
Année: 1990
Texte
Sommaire: The Underground Research Laboratory (URL) is located in southeastern Manitoba, in the Lac du Bonnet granite batholith of the Canadian Shield. It was constructed by Atomic Energy of Canada Limited (AECL) to conduct geotechnical research for the Canadian Nuclear Fuel Waste Management Program, assessing the concept of permanent disposal of nuclear fuel waste deep in plutonic rock.
One of the primary objectives of the research program at the URL is to develop a nondestructive rock mass characteri...
Publication: CIM Bulletin
Auteur(s): Arthur L. Holloway, James C. Mugford
Mots clés: Rock mechanics, Underground Research Laboratory (URL), Radar reflection, Granite fracturing.
Numéro: 940
Volume: 83
Année: 1990
Activé par Coveo Enterprise Search