Backfill practice and technology at Kidd Creek Mines

Abstract Kidd Creek Mines primarily employs sublevel blasthole sloping for underground mining operations. During pillar recovery in No. 1 Mine and panel mining in No. 2 Mine, the free standing fill exposures may reach a height of 100 m or more. Consequently, a competent consolidated rockfill has been required to fill the mined openings.
Since 1976, a total of more than fifty slopes and pillars have been filled with over four million tonnes of backfill. Fill exposures, up to heights of 100 m, have stood up well after blasting adjacent to the backfill.
The fill material consists of a graded aggregate, Portland cement and ground slag. Sand has been occasionally mixed in the fill material to serve as a void filler. The aggregate is prepared in a fill crushing plant, transported underground through raises, and hauled to the filling slopes by conveyors in No. 1 Mine and by trucks in No. 2 Mine.
Two mixing methods are currently in use. No. 1 Mine utilizes the free fall of gravity; the fill materials are sprayed with cement slurry as the aggregate departs from the conveyor into a mixing culvert. The other is the use of a rotary mixer on a batch basis in No. 2 Mine.
This paper describes the fill systems, filling operations, and the backfill quality control practice, together with various testing results related to improving fill quality as well as reducing fill costs.
Keywords: Rock mechanics, Backfill practice, Kidd Creek Mines Ltd., Blasting, Blasthole sloping, Underground mining, Aggregates, Portland cement, Ground slag.
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Publication: CIM Bulletin
Author(s): P.E. WEIDMARK
Issue: 856
Volume: 76
Year: 1983
Text
Summary: The mechanical aspects of cable bolt failure are considered from the point of view of properties of grout and cable, as well as of the rock in which it is anchored. The results from recent investigations made in-situ as well as in the lab are combined and presented with reference to other work done in the area. An attempt is made to stimulate the thinking along these lines so as to initiate further research which may enhance the design of cable bolting as it applied to mining operations.
Publication: CIM Bulletin
Author(s): M.L JEREMIC, G.J.P. DELAIRE
Keywords: Rock mechanics, cable bolts, Bond stress, Grout, Bond failure, Internal friction, External friction.
Issue: 856
Volume: 76
Year: 1983
Text
Summary: In this study, the authors investigated the stabilities of slopes cut predominantly into Trenton limestone in a large quarry in the Montreal region. Analyses of the bench and pit walls indicated that small-scale toppling, ravelling, and wedge failures are the most likely modes of instabilities. Because most of the joints dip steeply, however, the conclusion was made that relatively high walls could probably be justified.
The field investigations were supplemented with the determinations of...
Publication: CIM Bulletin
Author(s): JOHN E. UDD, MARC C. BETOURNAY
Keywords: Rock mechanics, slope stability, Trenton limestone, Montreal, Structural analysis, Failure analysis, Quarries, Geology.
Issue: 856
Volume: 76
Year: 1983
Text
Summary: Carbon addition in the oxide pelletizing process is a big concern at the Sidbec-Normines pelletizing plant since 1976.
Laboratory pot-grate testing carried out before the initial start-up of the Port-Cartier plant indicated that the nominal pelletizing grate capacity could be increased by fifteen per cent with a suitable carbon addition. Also an improved induration cycle offered the possibility of a significant energy reduction within the process with no adverse effect on pellet quality. A...
Publication: CIM Bulletin
Author(s): C. DESMEULES
Keywords: Energy management, Energy conservation, Coke breeze, Sidbec-Normines, Fire Lake, Pelletising, Pellets.
Issue: 856
Volume: 76
Year: 1983
Text
Summary: Afton Mines Ltd. (N.P.L.) operates an 8500-tpd open-pit copper-gold mine near Kamloops, B.C. The pit is currently 480 feet deep and will reach an ultimate depth of 800 feet.
The east, south and west walls of the pit are composed of Triassic andesites (Nicola Volcanic Formation) and contemporaneous sub-volcanic intrusions of micro-syenite, micro-diorite, diorite and picrite-basait (Iron Mask Pluton). The north wall of the pit consists of Tertiary sandstones, shales and mudstones (Tranquille...
Publication: CIM Bulletin
Author(s): ALAN REED
Keywords: Economic geology, Structural geology, Geostatistics, Afton Mine, Mineralization, Open-pit mining, Gold, Silver, Copper, Slope stability.
Issue: 856
Volume: 76
Year: 1983
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