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Numerical analysis of strengthening by rockfill embankments on an upstream tailings dam
Dam Safety Forum, Power Division Renewable Energy.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geoteknologi.
Tailings Consultants Scandinavia AB.
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2013 (Engelska)Ingår i: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 50, nr 4, s. 391-399Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The consolidation process could be slow in an upstream tailings dam; therefore, the stability can reduce due to an increase in excess pore pressures when the dam is raised. The safety of the dam can be enhanced by constructing rockfill berms on the downstream side. This paper presents a case study on the strengthening of an upstream tailings dam with rockfill berms. The finite element analyses were performed for modelling the staged construction of the dam and for optimizing the volume of the rockfill berms. The dam was raised in 11 stages; each stage consisting of a raising phase and a consolidation phase. The study shows that the slope stability of the dam reduced due to an increase of excess pore pressures during the raising phase. The stability of the dam was successfully improved by utilizing rockfill berms as supports on the downstream side. A technique has been presented to minimize the volume of the rockfill berms so that the required stability can be achieved at minimum cost. This paper shows that the finite element method can be a useful tool for modelling the consolidation behaviour of an upstream tailings dam and minimizing the volume of the rockfill berms that may be needed to maintain the stability of the dam during staged construction.

Ort, förlag, år, upplaga, sidor
2013. Vol. 50, nr 4, s. 391-399
Nyckelord [en]
consolidation, optimization, rockfill berms, slope stability, staged construction, tailings dams, Civil engineering and architecture - Geoengineering and mining engineering
Nyckelord [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
Nationell ämneskategori
Geoteknik
Forskningsämne
Geoteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-15769DOI: 10.1139/cgj-2012-0255ISI: 000317961900005Scopus ID: 2-s2.0-84876570432Lokalt ID: f4ff5c39-de38-4181-b422-0e9fe3541949OAI: oai:DiVA.org:ltu-15769DiVA, id: diva2:988744
Anmärkning

Validerad; 2013; 20130419 (muhauc)

Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2018-07-10Bibliografiskt granskad

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Zardari, Muhammad AucharMattsson, HansKnutsson, Sven

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Zardari, Muhammad AucharMattsson, HansBjelkevik, AnnikaKnutsson, Sven
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Canadian geotechnical journal (Print)
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