Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Compaction of confining materials in pillar blast tests
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-8564-3694
LKAB, Kiruna.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-5165-4229
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-9766-0106
2018 (English)In: Rock Mechanics and Rock Engineering, ISSN 0723-2632, E-ISSN 1434-453X, Vol. 51, no 6, p. 1907-1919Article in journal (Refereed) Published
Abstract [en]

Two confined pillar tests were conducted at the Kiirunavaara mine to investigate the degree of compaction of three materials, i.e., 0–32-mm backfilled material, a blend of ore and waste material and caved material. Two blastholes were drilled parallel to each pillar wall, and several measurement holes were drilled in between the blastholes through each pillar. Both the measurement holes and backfilled materials, except the caved material, were instrumented. Two types of measurements were taken: dynamic measurements with accelerometers, and static measurements which considered the location of the instrumentation pre- and post-blast. Dynamic measurements involved the burden movement and the confining material behavior, and static measurements contained the final location of sensors inside and the angle of repose of the confining material. The results showed that the size distribution of the confining material affects its behavior under dynamic loading. The backfilled materials showed an apparent cohesion forming an agglomeration on the surface of the blasted burden. The burden moved as one slab due to simultaneous detonation. A gap was formed between the blasted burden and the new face. This gap was partially filled with burden erosion material which was finer fragmented than the blasted burden material.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 51, no 6, p. 1907-1919
Keywords [en]
Compaction, burden movement, pillar tests, sublevel caving, confined blasting
National Category
Mineral and Mine Engineering Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-67850DOI: 10.1007/s00603-018-1447-8ISI: 000433195900016Scopus ID: 2-s2.0-85047517598OAI: oai:DiVA.org:ltu-67850DiVA, id: diva2:1187849
Projects
Improved understanding of sublevel blasting – Determination of the extent of the compacted zone, its properties and the effects on caving
Note

Validerad;2018;Nivå 2;2018-06-01 (rokbeg)

Available from: 2018-03-06 Created: 2018-03-06 Last updated: 2018-08-27Bibliographically approved

Open Access in DiVA

fulltext(3297 kB)66 downloads
File information
File name FULLTEXT01.pdfFile size 3297 kBChecksum SHA-512
a1047cd5874866ef00682a8c6db974036e5c2422142d15930b766175ac1f113203b2a6fb9e6a62259909401faa1dba18effe3c742e6055a022d3b7a0f7819ea0
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Petropoulos, N.Johansson, D.Nordlund, E.

Search in DiVA

By author/editor
Petropoulos, N.Johansson, D.Nordlund, E.
By organisation
Mining and Geotechnical Engineering
In the same journal
Rock Mechanics and Rock Engineering
Mineral and Mine EngineeringOther Civil Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 66 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

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 313 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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