The Cigar Lake Mining Test

Abstract Cigar Lake Mining Corporation is presently operating an underground test mine in northern Saskatchewan, with a view to developing a high grade uranium deposit.
The mining test is intended to demonstrate that the innovative mining methods designed are safe and economical. Two vertical mining methods are considered for the test:• box hole boring from the lower level; • blind boring from the upper level. In both cases, it is anticipated to freeze the ground before excavation to ensure hole stability and limit the inflow of water. Special care will be taken to minimize radiation exposure of personnel. Remote controlled equipment will be used where applicable.
The access to the orebody was an important component of the test. After shaft sinking to a depth of 500 m, development work commenced at the 420 level in fractured sandstone which was grouted to restrict the inflow of formation water. The drifting continued in a section of poorly consolidated sand, clay and sandstone; this area was frozen to allow stabilization prior to excavation. At the 480 level relatively little water was encountered in the altered basement gneiss and grouting was not necessary; however, extensive ground support was required in the soft ground areas.
Keywords: Cigar Lake, Underground test mine, Vertical mining methods, Uranium mining, Mining methods, Shaft sinking, Radon emanation.
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Summary: The Province of Manitoba tabled a Budget on March 11, 1992, which contains some important new initiatives designed to improve the fiscal environment for mining in the province. In addition, the Minister of Energy and Mines has released details of the Mineral Exploration Incentive Program which was originally announced in the 1991 Budget.
Publication: CIM Bulletin
Author(s): Robert B. Parsons
Issue: 960
Volume: 85
Year: 1992
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Summary: This paper addresses the occurrence and indicated causes of conveyor fires in North American and European underground mines. Some significant conveyor fires which have been experienced in recent years in Canadian hardrock mines are then reviewed. The nature of existing conveyor monitoring technology is considered in the context of such fire hazards. Experiences with new monitoring technology recently installed at several conveyor sites at Inco Ltd. mines are then reviewed.
Publication: CIM Bulletin
Author(s): J. Stachulak, M. Scoble
Keywords: Conveyors, Fire hazards, Underground mining, Safety, Inco Limited.
Issue: 960
Volume: 85
Year: 1992
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Summary: Conveyor belts installed in an underground mine can be a potential source of a major fire, thus the need for fire-retardant belting. A Canadian Standard, CAN/CSA-M422-M87, incorporating a small-scale flame test, a drum-friction test, a flame propagation test and an electrical surface-resistance test, has been developed to meet the varied needs of the mining industry. It is recommended that mines use Types A and B belting described in that Standard, because they will have passed the large-scal...
Publication: CIM Bulletin
Author(s): K.J. Mintz
Keywords: Conveyor belts, Underground mining, Fire-retardant conveyor belts.
Issue: 960
Volume: 85
Year: 1992
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Summary: The Quebec Mining Association has for many years been supportive of the activities of the Centre de recherches mmerales which were initiated to ensure regular production hoist and cable inspections to maintain safety and productivity standards in underground mines in Quebec. CRMand CANMET have agreed to fund a Quebec Mineral Development Agreement contract to capture this accumulated knowledge.
Using VP-EXPERT to process the information and subdirectories to store regulations, the prototype...
Publication: CIM Bulletin
Author(s): Denis Lessard, Roger Demers, Noel R. Billette
Keywords: Underground mining, Computer applications, Hoist expert system, Expert system, Safety, Production.
Issue: 960
Volume: 85
Year: 1992
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Summary: Midwest Joint Venture (MJV) owns a high-grade uranium deposit in northern Saskatchewan. The deposit is located too deep below surface to be mined economically by open pit methods, and as a consequence, present plans are that it will be mined by underground methods. High-grade uranium ore of the type at MJV, encased in weak, highly altered ground and with radon-rich water inflows, has not before been mined by underground methods.
The test mining phase of the project, completed in 1989, had...
Publication: CIM Bulletin
Author(s): H.K. Fredrickson
Keywords: Underground mining, Uranium mining, Saskatchewan, Mining methods, Midwest Joint Venture.
Issue: 960
Volume: 85
Year: 1992
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Summary: The use of hydraulically delivered classified tailings sands to provide ground support in large mining operations is still widespread despite recent developments of alternate backfilling methods and materials. The major disadvantages of the use of hydraulic fill are the costs and risks associated with slurry delivery. The main risk is that of bulkhead failure resulting from sand liquefaction due to insufficient operational control or due to dynamic loading from earthquake or rockburst. That...
Publication: CIM Bulletin
Author(s): R.J. Mitchell
Keywords: Centrifuge model studies, Backfilling, Bulkheads, Models, Fill pressures, Underground mining, Prototypes.
Issue: 960
Volume: 85
Year: 1992
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Summary: Graphite is one of the most versatile of non-metallic minerals because of its diversified properties, for example: it is unctuous; it marks readily; burns slowly; is almost chemically inert; is flexible over a large temperature range; is a good conductor of heat and electricity; is hydrophobic; has a negative temperature coefficient of resistivity; has excellent weathering properties; tends to emulsify with water-in-oil; is readily soluble in iron; and after oxidative treatment, can exfoliate...
Publication: CIM Bulletin
Author(s): P.R.A. Andrews
Keywords: Industrial minerals, Graphite ores, Beneficiation of Canadian graphite ores, Mineral processing.
Issue: 960
Volume: 85
Year: 1992
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Summary: This paper describes recent developments at Inco Limited, Ontario Division, in the field of information systems for automated mining. A CA TV cable network has been combined with a broad spectrum radio antenna system to allow the supply of voice, data and video services to underground mining. The system formed the basis of a field experiment at the Copper Cliff North Mine of the Ontario Division in 1990.
The experimental information system was developed to supply underground mining with...
Publication: CIM Bulletin
Author(s): G.R. Baiden, M. Scoble
Keywords: Inco Limited, Information systems, Automation, Future ORE MANufacturing, FOREMAN Project, Distribution Antenna Translator (DAT), North Mine.
Issue: 960
Volume: 85
Year: 1992
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