Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
3D mapping of sublevel caving (SLC) blast rings and ore flow disturbances in the LKAB Kiruna mine
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Mining Technology R and D, LKAB Kiruna Mine.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Mining Technology R and D, LKAB Kiruna Mine.
Show others and affiliations
2012 (English)In: MassMin 2012: Proceedings of the 6th International Conference and Exhibition on Mass Mining, Sudbury, Canada June 2012, Sudbury, Canada: Canadian Institute of Mining, Metallurgy and Petroeum , 2012Conference paper, Published paper (Refereed)
Abstract [en]

Sublevel caving (SLC) is a highly productive mining method with the major disadvantages of irrepressible ore loss and dilution. The confined blasting situation of SLC rings is commonly regarded to have a significant impact upon the material flow characteristics and hence on the overall performance. The initial conditions for the ore flow after blasting are unknown, as both the blasted geometry and the fragmentation itself are normally hidden. However, when opening a new drawpoint and in hang-up situations an inspection of the actual conditions is feasible. For this purpose, a remotely operated 3D photogrammetry system was custom built and used to reconstruct the ring front and/or cavity as a geo-referenced mesh model with colour information. Various blasting situations have been observed and this allowed a deeper study of the i) broken geometry and height, ii) over- and underbreak and their effects on subsequently blasted rings, iii) interaction effects between adjacent holes/rings, iv) drilling accuracy based on identified boreholes and v) mapping of geological structures and their influence on the blast result. The capabilities of the 3D image acquisition system to evaluate the blasting results are demonstrated with an example, in which a series of blasts were surveyed. Monitoring under hang-up situations, has then revealed the actual effects from confined blasting and gravity flow related issues. The 3D photogrammetry system is now increasingly being used to study hang-ups. By revealing and quantifying hitherto inaccessible information, the system has proven to be a valuable tool in increasing the understanding of both SLC breakage and flow.

Place, publisher, year, edition, pages
Sudbury, Canada: Canadian Institute of Mining, Metallurgy and Petroeum , 2012.
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-34470Local ID: 8ae4aac0-fbda-45bc-9ede-fbc7cc93e8e1OAI: oai:DiVA.org:ltu-34470DiVA: diva2:1007721
Conference
International Conference & Exhibition on Mass Mining : 10/06/2012 - 14/06/2012
Note
Godkänd; 2012; Bibliografisk uppgift: CD-ROM; 20121112 (matwim)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

Open Access in DiVA

fulltext(530 kB)108 downloads
File information
File name FULLTEXT01.pdfFile size 530 kBChecksum SHA-512
33fa15633c21914a8abfdf0f4b43a2e6f2d7ccbfd0a24535ab0a1d66fdf405fa61d0c705a08d3a0e0f88b1ba3807a82b47a8f732e726872725adcd9d3c891b4a
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Wimmer, MatthiasOuchterlony, Finn
By organisation
Mining and Geotechnical Engineering
Other Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 108 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 145 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf