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Draw control optimization along the production drift in sublevel caving mines
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-8264-1255
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5347-0853
LKAB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2016 (English)In: Seventh International Conference & Exhibition on Mass Mining : (MassMin 2016), Sydney: The Australian Institute of Mining and Metallurgy , 2016, p. 241-249Conference paper, Published paper (Refereed)
Abstract [en]

The amount of material extracted from each blasted ring in sublevel caving mines is vital when deciding the overall mine production target. The orientation of the production drifts is normally perpendicular to the strike of the orebody, and rings are blasted from the hanging wall side to the footwall side in a retreating manner. For an inclined orebody, a given ring will contain different amounts of material based on its relative position along the production drift. This layout creates a distinctive problem with respect to the extraction ratio optimisation along the axis of the production drift. This paper describes the current drawpoint control strategy practiced at LKAB and presents the variation of drawpoint performance parameters along the production drifts. It uses automatically generated data from a bucket weighing system that measures tonnage drawn per bucket, and it classifies the blasted rings into four zones based on their relative position along the production drift. It considers the loading procedure for blasted rings at Kiirunavaara mine and analyses the variations in drawpoint performance along the production drift. The paper finds that although the current draw control strategy is sensitive to ring position along the drift, it could be modified to optimise the final extraction ratio.

Place, publisher, year, edition, pages
Sydney: The Australian Institute of Mining and Metallurgy , 2016. p. 241-249
Keywords [en]
sub-level caving, Draw control, optimization, Grade control, Dynamic loading control, Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering; Future mining (AERI)
Identifiers
URN: urn:nbn:se:ltu:diva-35235Local ID: 9afe5dfb-d804-4a10-90f1-b2dee55cec55ISBN: 9781925100433 (print)OAI: oai:DiVA.org:ltu-35235DiVA, id: diva2:1008487
Conference
International Conference & Exhibition on Mass Mining : 09/05/2016 - 11/05/2016
Note

Godkänd; 2016; 20160613 (gurshe)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-04-16Bibliographically approved

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Shekhar, GurmeetGustafson, AnnaSchunnesson, Håkan

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