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Numerical Analyses of Earthquake Induced Liquefaction and Deformation Behaviour of an Upstream Tailings Dam
Quaid-e-Awam University of Engineering Science and Technology: Nawabshah, Pakistan.ORCID iD: 0000-0002-3197-4786
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
Department of Urban Management, Kyoto University, Kyoto, Japan.
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Number of Authors: 62017 (English)In: Advances in Materials Science and Engineering, ISSN 1687-8434, E-ISSN 1687-8442, Vol. 2017, article id 5389308Article in journal (Refereed) Published
Abstract [en]

Much of the seismic activity of northern Sweden consists of micro-earthquakes occurring near postglacial faults. However, larger magnitude earthquakes do occur in Sweden, and earthquake statistics indicate that a magnitude 5 event is likely to occur once every century. This paper presents dynamic analyses of the effects of larger earthquakes on an upstream tailings dam at the Aitik copper mine in northern Sweden. The analyses were performed to evaluate the potential for liquefaction and to assess stability of the dam under two specific earthquakes: a commonly occurring magnitude 3.6 event and a more extreme earthquake of magnitude 5.8. The dynamic analyses were carried out with the finite element program PLAXIS using a recently implemented constitutive model called UBCSAND. The results indicate that the magnitude 5.8 earthquake would likely induce liquefaction in a limited zone located below the ground surface near the embankment dikes. It is interpreted that stability of the dam may not be affected due to the limited extent of the liquefied zone. Both types of earthquakes are predicted to induce tolerable magnitudes of displacements. The results of the postseismic slope stability analysis, performed for a state after a seismic event, suggest that the dam is stable during both the earthquakes

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2017. Vol. 2017, article id 5389308
Keywords [en]
tailings, dams, earth-quake, dynamic loading, stability
National Category
Geotechnical Engineering Geochemistry
Research subject
Soil Mechanics; Applied Geochemistry
Identifiers
URN: urn:nbn:se:ltu:diva-62037DOI: 10.1155/2017/5389308ISI: 000395137300001Scopus ID: 2-s2.0-85014464790OAI: oai:DiVA.org:ltu-62037DiVA, id: diva2:1074709
Note

Validerad; 2017; Nivå 2; 2017-02-16 (andbra)

Available from: 2017-02-16 Created: 2017-02-16 Last updated: 2018-11-20Bibliographically approved

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Auchar Zardari, MuhammadMattsson, HansKnutsson, SvenAsk, Maria

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