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An investigation of borehole stability in LKAB Malmberget underground mine, Sweden
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.ORCID iD: 0000-0001-9108-9386
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
LKAB, Research & Development, 983 81 Malmberget.
2013 (English)In: Rock Characterisation, Modelling and Engineering Design Methods -: Proceedings of the 3rd ISRM SINOROCK 2013 Symposium / [ed] Xia-Ting Feng; John A. Hudson; Fei Tan, Leiden: CRC Press/Balkema , 2013, p. 747-752Conference paper, Published paper (Refereed)
Abstract [en]

Instability in production blast holes causes poor fragmentation, lower ore recovery, delay in production and higher costs in crushing and grinding. In this investigation, three large ore bodies named Alliansen, Fabian and Vi-Ri were selected. A video camera was used for mapping production blast holessoastofind borehole stability problems. A total of 298 blast holes were filmed. There were eight types of stability problems identified in the blast holes. These are shear zone, loose rock, cave, crack, deformation, stone jammed, spalling and rock breakage. Among these problems, deformation and crack were the most common ones in all the ore bodies. In addition, instability problem in the blast holes were higher around the rings which were blasted last. Further it has been found that the area which is affected by more seismic responses is the same as the one where several boreholes were re-drilled or sheared.

Place, publisher, year, edition, pages
Leiden: CRC Press/Balkema , 2013. p. 747-752
National Category
Other Civil Engineering
Research subject
Operation and Maintenance; Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-32051Local ID: 66966be7-3524-4eaa-8dc2-0c593df66834ISBN: 978-1-138-00057-5 (print)OAI: oai:DiVA.org:ltu-32051DiVA, id: diva2:1005285
Conference
ISRM Symposium on Rock Mechanics : Rock Characterisation, Modelling and Engineering Design Methods 18/06/2013 - 20/06/2013
Note
Godkänd; 2013; 20130813 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-12Bibliographically approved

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Ghosh, RajibNyberg, Ulf

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
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  • en-US
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  • nn-NB
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  • Other locale
More languages
Output format
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