Authors: Lindqvist, T; Nystrom, A; Brodin, P; Norling, L

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Lindqvist, T, Nystrom, A, Brodin, P & Norling, L 2006, 'Paste Backfill at Garpenberg North Mine', in R Jewell, S Lawson & P Newman (eds), Proceedings of the Ninth International Seminar on Paste and Thickened Tailings, Australian Centre for Geomechanics, Perth, pp. 303-311.

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New Boliden has owned and operated the Garpenberg Mine, which is 180 km north west of Stockholm, Sweden, since 1957. Mining started at the Mine about 800 years ago. Recently the new Lappberget ore body was discovered close to Garpenberg North. Lappberget ore is suitable for large-scale stoping, which calls for high strength in the backfill. The current mining method is a cut and fill operation that uses rock and sand backfill (cycloned mill tailings). To properly develop the ore body, cemented paste fill is the key to safe and profitable mining. Garpenberg, together with Outokumpu Technology, evaluated and performed testwork on the tailings. Outokumpu Technology then assessed various technical and economical issues in a comprehensive feasibility study. This paper presents the basis for implementing paste backfill at the Garpenberg Mine. The plant will be commissioned during spring 2006.

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