Prediction of ground control problems for underground coal mining in southern Alberta

Mots clés : Underground mining;Ground control;Coal Mining;Mine planning;Roof stability;Subsidence;Longwall mining
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Texte
Sommaire: Inert gas use for underground mine fire control is a well established mature technology in some parts of the world. This paper reviews three candidate inert gases and describes three case histories where inert gas fire fighting technology was used in actual underground fires.
Publication: CIM Bulletin
Auteur(s): J.P.L. BACHARACH
Mots clés: Underground mining, Mine fire control, Inerting systems, Coal mines, Gaseous combustion products, Carbon dioxide, Nitrogen, Methane
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: Lime is commonly used for the neutralization of acid, and the removal of heavy metals in mine waste waters. However, the precipitation of heavy metals as hydroxides must take place under conditions of controlled pH, to produce minimum concentrations of dissolved metals. An account is presented explaining the concepts applied to lime-treatment processes at Bell Mine during the period of a supernatant discharge to Babine Lake; October 18, 1982 to January 25, 1983.
Publication: CIM Bulletin
Auteur(s): E. GOODWIN
Mots clés: Hydrometallurgy, Water treatment, Supernatant discharge, Tailings, Lime treatment, Environmental control
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: Parameters for design and development of an emergency hoist system (Fig. 1) were submitted to Timberland Equipment Limited of Woodstock, Ontario by the Potash Corporation of Saskatchewan Mining Limited.
The unit is the first of its kind in Canada. Not only does it comply with the province of Saskatchewan's mining regulations, but has the added advantage of being completely mobile and self-contained.
As well as being useful in the mining industry, the mobile hoist unit could be used in other...
Publication: CIM Bulletin
Auteur(s): DONALD ROBERTS
Mots clés: Underground mining, Hoists, Emergency hoist system, Potash mines, Mine safety, Shafts
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: This paper summarizes work carried out at the Dome Mine to mechanize the mining of narrow veins of less than 1.5 m in width by the introduction of new mining methods and specifically designed electric LHDs.
Extensive mining trials have been conducted using sublevel blast hole, modified Avoca, and resuing mining methods. The introduction of the Microscoop and the Jarvis Clark remote, radio-controlled scooptram has increased mucking productivity.
As a result of this work, additional narrow vein...
Publication: CIM Bulletin
Auteur(s): BRIAN E. ROBERTSON
Mots clés: Underground mining, Narrow vein mining, LHD mining, Sublevel blasthole sloping, Avoca method, Resuing, Cut-and-fill mining, Sloping, Hydraulic filling, Drilling, Blasting, Dome Mine
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: The new Ontario Liberal government introduced its first budget in October. The changes to The Mining Tax Act proposed in the budget are meant to simplify the current system without any loss of revenue to the government. It goes without saying that some operators will benefit from the changes while others will pay more taxes after 1985.
With regard to ongoing matters at the federal level, the proposed carve-out legislation and the issue of northern allowances are being discussed with governmen...
Publication: CIM Bulletin
Auteur(s): ROBERT B. PARSONS
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: In 1982 an extensive study was carried out to determine the best means of size reduction for the ore to be hoisted through the borehole hoisting system at Sherritt Gordon's Fox Mine. The study examined three alternatives:1. a jaw crusher,2. pneumatic rockbreaker(s) at a grizzly, and3. hydraulic rockbreaker(s) at a grizzly.
The final decision was a compromise between alternatives 2 and 3. Two rockbreakers, one pneumatic and one hydraulic, were installed over a single grizzly. Some modification...
Publication: CIM Bulletin
Auteur(s): JOHN G. KELLY
Mots clés: Underground mining, Rockbreaking system, Jaw crushers, Pneumatic rockbreakers, Hydraulic rockbreakers, Borehole hoisting system, Equipment maintenance
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: Frozen tailings material may be required, in the future, to perform the support functions of underground backfill in mines located in zones of permafrost, notably in the high Arctic. To date, no knowledge of physical support parameters of such materials has been obtained in Canada due to the limited mining activity in permafrost regions. It is therefore judged essential that the important physical and mechanical properties relating to frozen tailings material be assessed.
Innovative mining...
Publication: CIM Bulletin
Auteur(s): JAMES F. ARCHIBALD, JACQUES H. MANTEL
Mots clés: Underground mining, Ground support, Arctic mining, Permafrost, Frozen tailings, Mine backfill, Granulometry, Pelletizing
Numéro: 885
Volume: 79
Année: 1986
Texte
Sommaire: In the context of today's continuously changing world, there are many factors which must be considered when attempting to assess the ability of Canada's primary copper producers to remain competitive in the face of increasing competition in world markets. In this paper, we have attempted to document those factors that will have the greatest impact on the future viability of Canada's copper industry, and to suggest possible strategies to fully utilize whatever inherent advantages Canada may...
Publication: CIM Bulletin
Auteur(s): W.J.S. CRAIGEN, G.E. WITTUR
Mots clés: Pyrometallurgy, Copper, Sulphur, Metals recovery, Emissions, Hydrometallurgical process, Extraction, Refining process, Smelting process, Markets, Production costs
Numéro: 885
Volume: 79
Année: 1986
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