Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Seepage and critical hydraulic gradients in tailings dams and natural formations
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
2007 (English)In: Proceedings of the 2nd International Conference on Porous Media and its Applications in Science and Engineering, ICPM2: June 17-22, 2007, Kauai, Hawaii, USA, Engineering Conferences International , 2007Conference paper, Published paper (Refereed)
Abstract [en]

Embankment dams, both water Retention Dams (WRD) and tailings dams, are constructed of granular material. Natural seepage flow through porous media, i.e. soil, rock, and tailings, occurs in all types of dams. During this process, particles in the porous media are exposed to hydraulic gradients. Under certain circumstances seepage can initiate internal erosion which can seriously damage the construction, eventually resulting in serious accidents or failure. The process starts when a critical hydraulic gradient is reached, which may vary with the way of construction, materials used and its properties and compaction. This is of special importance for dams constructed of mine waste, i.e. tailings dams, where the stability and function has to be guaranteed over very long time periods (>1000 years). Here, seepage, internal erosion and the corresponding critical gradient are fundamental parameters. It is not clear under which circumstances the process of internal erosion begins, i.e. when one particle in the system starts to move, thus creating a further process of particle transportation in the system. To common way to control seepage, filter layers are included in the construction. However, erosion, piping or sinkholes are still observed. Different models on the hydraulic conductivity and hydraulic gradient are presented and discussed.  Properties of tailings in comparison with natural geological materials are identified. Observations from several natural geological formations in Sweden, which have fulfilled the function of a dam since the last glaciation, are presented and the critical hydraulic gradients with respect to vary long time periods are compared.

Place, publisher, year, edition, pages
Engineering Conferences International , 2007.
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-37701Local ID: bcc4e2f0-7660-11dc-824d-000ea68e967bOAI: oai:DiVA.org:ltu-37701DiVA: diva2:1011199
Conference
International Conference on Porous Media and its Applications in Science, Engineering and Industry : 17/06/2007 - 21/06/2007
Note
Godkänd; 2007; 20071009 (isajan)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved

Open Access in DiVA

fulltext(325 kB)22 downloads
File information
File name FULLTEXT01.pdfFile size 325 kBChecksum SHA-512
3fad8acce0f604ba528840c05eb39364b28314e9330f27f399f2b4672f1b451519c3ac22023f898da53f9c5541b39a0c622364770e7b34a274ca93fdc2ef4d18
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Jantzer, IsabelKnutsson, Sven
By organisation
Mining and Geotechnical Engineering
Geotechnical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 22 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 21 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf