The testing, design, construction, and implementation of cemented rockfill (CRF) at Polaris

In December 1994, Polaris decided to investigate the use of cemented rockfill (CRF) to supplement the existing frozen rockfill system. Extraction plans for the remaining ore reserves required a backfill with superior stiffness properties and capable of developing high early strengths. Although CRF has been used successfully at several mining operations, there was the additional challenge of making a reliable cemented product in permafrost conditions. There was also the challenge of procuring and
storing one year’s supply (13 000 tonnes) of bulk cement. By the spring of 1995, following three months of research, test work and process design, the decision was made to proceed with the procurement and construction of a 3000 tpd batch plant. An ambitious completion date of December 1995 was set. Team Manufacturing of Langley, British Columbia was awarded the contract, complete with the considerable task of having the batch plant fabricated and ready for sea lift shipment by August, 1995.
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Publication: CIM Bulletin
Author(s): T.F. Pugsley, D. Gignac
Issue: 1005
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Graham Farquharson, James Marshall
Issue: 1005
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Lawrence Devon
Issue: 1005
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): D.E. Wakefield
Issue: 1005
Volume: 89
Year: 1996
Text
Publication: CIM Bulletin
Author(s): Joanna LaForte
Issue: 1005
Volume: 89
Year: 1996
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Summary: The pace at which mining will occur in Northern regions and Arctic lands will depend on the answers to a number of questions. Who are the local aboriginal participants? What land uses are they pursuing? What are their objectives? What is their understanding of the process of mining development? This paper will focus on the last question, communicating the process of mineral development to local aboriginal communities.
Publication: CIM Bulletin
Author(s): Donald E. Wakefield
Issue: 1005
Volume: 89
Year: 1996
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Summary: This paper is a practical overview of ways to reduce cost in the design and operation of an Arctic mine. The economically important issues of the Arctic mine that will be addressed include: permafrost and the active zone in general terms; road building in and over permafrost; Arctic geotechnical mine design considerations; pit dewatering techniques in subzero temperatures; and blasting frozen materials with techniques to obtain optimal results. A final section on a few special topics...
Publication: CIM Bulletin
Author(s): Alan E. Renshaw
Issue: 1005
Volume: 89
Year: 1996
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Summary: Alaska’s Red Dog Mine is strengthening its position within Cominco’s “Vision 2000” strategic plan by continually improving quality and quantity of production while reducing costs. Red Dog has evolved into a stable and mature operation, after six years of milling experience. A high grade, partially oxidized ore body in the severe Arctic environment, along with competing producers in a volatile metals market, are the continuing challenges facing Red Dog. The Red Dog Mine is striving to...
Publication: CIM Bulletin
Author(s): M. Naseem Mian, Curtiss O. Ehrsam
Issue: 1005
Volume: 89
Year: 1996
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Summary: Environmental auditing has evolved rapidly over the last decade — first in North America, then Europe, and most recently in Asia — into a widely practiced discipline designed to provide senior management with assurance that operations are being managed in compliance with established governmental standards, internal company policies, and good industry practices. This paper first examines the evolution of environmental auditing, focusing in particular on three interlocking driving forces:...
Publication: CIM Bulletin
Author(s): Raymond B. Hryciuk, Arthur D. Little
Issue: 1005
Volume: 89
Year: 1996
Text
Summary: In this study, potential benefits of flocculant usage were explored in the processing of mill tailings by hydrocyclones. Tests conducted on copper-nickel mill tailings have demonstrated
that, under suitable conditions, flocculation could significantly enhance solid-liquid separation in hydrocyclones. For example, at a feed pulp density of approximately 9%, flocculantassisted hydrocyclone produced an underflow with over 98% solids recovery, compared to a recovery of less than 53% with...
Publication: CIM Bulletin
Author(s): Turgut Yalcin
Issue: 1005
Volume: 89
Year: 1996
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