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Influence of large-scale structures on the stability of the hangingwall in a caving mine: a modeling study
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0001-6582-720X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2016 (English)In: International Journal of Mining and Mineral Engineering, ISSN 1754-890X, E-ISSN 1754-8918, Vol. 7, no 4, p. 294-312Article in journal (Refereed) Published
Abstract [en]

The Printzsköld orebody in the Malmberget mine of NorthernSweden is currently under production and is centrally located in the miningarea. The effects of the on-going sublevel cave-mining in this orebody arecurrently investigated with respect to cave development with an initialemphasis on the effects of stress redistribution and potential rock massyielding. In this study, three-dimensional discontinuum modelling of thePrintzsköld orebody is presented, in which the effect of three pre-existinglarge-scale geological structures have been studied. The results of the presentstudy showed low stress build-ups in the crown pillar and cave bottom, due toshear slip developing along the structures. The presence of large-scalestructures has no significant effects on the far-field stresses as shear slip alongthese structures is confined to cave boundaries. An analysis of the shearstrength of the structures showed larger effects of slip on reducing frictionangle than the reduction of cohesion.

Place, publisher, year, edition, pages
InderScience Publishers, 2016. Vol. 7, no 4, p. 294-312
Keywords [en]
Large-scale structures, shear slip, Printzköld orebody, failure mechanism, numerical analysis
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63680DOI: 10.1504/IJMME.2016.10000783OAI: oai:DiVA.org:ltu-63680DiVA, id: diva2:1104938
Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-11-24Bibliographically approved

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Umar, Sraj BandaEdelbro, Catrin

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