Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden
The LKAB Malmberget Mine is mined using sublevel caving. This mining method is cost-effective but results in successive caving of the host rock and mining-induced ground deformations. Consequently, re- locations of residential areas have been in progress in Malmberget ever since iron ore extraction...
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Luleå tekniska universitet, Geoteknologi
2013
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ftluleatu:oai:DiVA.org:ltu-12137 2023-05-15T17:10:08+02:00 Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden Umar, Sraj Banda Sjöberg, Jonny Nordlund, Erling 2013 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-12137 eng eng Luleå tekniska universitet, Geoteknologi Itasca Consultants AB, Luleå, Sweden Scienpress Ltd Journal of Earth Sciences and Geotechnical Engineering, 1792-9040, 2013, 3:4, s. 147-173 orcid:0000-0001-6582-720X orcid:0000-0002-9766-0106 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-12137 Local b36989b4-f4df-41dd-a08c-31b234d511a0 info:eu-repo/semantics/openAccess Mining-induced subsidence rock strength numerical analysis weak zone characterization Other Civil Engineering Annan samhällsbyggnadsteknik Article in journal info:eu-repo/semantics/article text 2013 ftluleatu 2022-10-25T20:58:53Z The LKAB Malmberget Mine is mined using sublevel caving. This mining method is cost-effective but results in successive caving of the host rock and mining-induced ground deformations. Consequently, re- locations of residential areas have been in progress in Malmberget ever since iron ore extraction on industrial scale commenced about a century ago. This study seeks to increase the understanding of the intrinsic characteristics of the rock mass governing deformation and caving activities. Rock mass characterizations were done in two selected orebodies — Printzsköld and Fabian. Two drill holes were drilled in each orebody from the surface. Geotechnical core logging was performed using the RMR system. Weakness zones were categorized to determine what role they played in the caving process. Point load testing was conducted for a sampling interval of about 5 m and selected uniaxial compressive strength tests were conducted to calibrate the point load index. Tunnel mapping was conducted in the hangingwall of the Printzsköld orebody. The finite element modeling code Phase2 was used for a sensitivity analysis of rock strength parameters and tostudy factors that may influence initiation of caving of the hangingwall. Validerad; 2013; 20131129 (sraban) Article in Journal/Newspaper Malmberget Luleå University of Technology Publications (DiVA) |
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Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Mining-induced subsidence rock strength numerical analysis weak zone characterization Other Civil Engineering Annan samhällsbyggnadsteknik |
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Mining-induced subsidence rock strength numerical analysis weak zone characterization Other Civil Engineering Annan samhällsbyggnadsteknik Umar, Sraj Banda Sjöberg, Jonny Nordlund, Erling Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
topic_facet |
Mining-induced subsidence rock strength numerical analysis weak zone characterization Other Civil Engineering Annan samhällsbyggnadsteknik |
description |
The LKAB Malmberget Mine is mined using sublevel caving. This mining method is cost-effective but results in successive caving of the host rock and mining-induced ground deformations. Consequently, re- locations of residential areas have been in progress in Malmberget ever since iron ore extraction on industrial scale commenced about a century ago. This study seeks to increase the understanding of the intrinsic characteristics of the rock mass governing deformation and caving activities. Rock mass characterizations were done in two selected orebodies — Printzsköld and Fabian. Two drill holes were drilled in each orebody from the surface. Geotechnical core logging was performed using the RMR system. Weakness zones were categorized to determine what role they played in the caving process. Point load testing was conducted for a sampling interval of about 5 m and selected uniaxial compressive strength tests were conducted to calibrate the point load index. Tunnel mapping was conducted in the hangingwall of the Printzsköld orebody. The finite element modeling code Phase2 was used for a sensitivity analysis of rock strength parameters and tostudy factors that may influence initiation of caving of the hangingwall. Validerad; 2013; 20131129 (sraban) |
format |
Article in Journal/Newspaper |
author |
Umar, Sraj Banda Sjöberg, Jonny Nordlund, Erling |
author_facet |
Umar, Sraj Banda Sjöberg, Jonny Nordlund, Erling |
author_sort |
Umar, Sraj Banda |
title |
Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
title_short |
Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
title_full |
Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
title_fullStr |
Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
title_full_unstemmed |
Rock mass characterization and conceptual modeling of the Printzsköld orebody of the Malmberget mine, Sweden |
title_sort |
rock mass characterization and conceptual modeling of the printzsköld orebody of the malmberget mine, sweden |
publisher |
Luleå tekniska universitet, Geoteknologi |
publishDate |
2013 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-12137 |
genre |
Malmberget |
genre_facet |
Malmberget |
op_relation |
Journal of Earth Sciences and Geotechnical Engineering, 1792-9040, 2013, 3:4, s. 147-173 orcid:0000-0001-6582-720X orcid:0000-0002-9766-0106 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-12137 Local b36989b4-f4df-41dd-a08c-31b234d511a0 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766066579496239104 |