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Modelling of caving and deformation mechanisms of the hangingwall of the Printzsköld oreboby at Malmberget mine
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-6582-720X
tasca Consultants AB, Luleå.
Loussavaara-Kiirunavaara AB (LKAB) Malmberget Mine, Gällivare.
2017 (English)In: The Southern African Journal of Mining and Metallurgy, ISSN 2225-6253, E-ISSN 1543-9518, Vol. 117, no 4, p. 351-360Article in journal (Refereed) Published
Abstract [en]

Sublevel caving in Malmberget mine results in mining-induced surfacedeformation. One of the currently mined orebodies is the Printzsköldorebody. As mining deepens there is need to assess the behaviour of thecave formed in the subsurface above this orebody. Numerical analysis wasused to assess the effects of extraction to deeper levels and performstrength parametric studies. Stress redistribution was studied, and theresults showed high stress buildups in the hangingwall and the crownpillar. Two failure mechanisms have been identified – shear and tensile.Reducing cohesion by 50% increased the area of the yielded zone by morethan 100% in the hangingwall.

Place, publisher, year, edition, pages
Southern African Institute of Mining and Metallurgy , 2017. Vol. 117, no 4, p. 351-360
Keyword [en]
Numerical Modelling, sublevel caving, caving mechanism, strength parametric study, stress redistribution, hangingwall stability
National Category
Geotechnical Engineering Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63681DOI: 10.17159/2411-9717/2017/v117n4a6ISI: 000406200400006Scopus ID: 2-s2.0-85039855515OAI: oai:DiVA.org:ltu-63681DiVA, id: diva2:1104968
Note

Validerad;2017;Nivå 2;2017-06-13 (andbra)

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2018-01-15Bibliographically approved

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Umar, Sraj Banda

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