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Coupled THMC modelling of single fractures in novaculite and granite
Vise andre og tillknytning
2018 (engelsk)Inngår i: 2nd International Discrete Fracture Network Engineering Conference, DFNE 2018, American Rock Mechanics Association (ARMA), 2018Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The host rock immediately surrounding a nuclear waste repository has the potential to undergo a complex set of physical and chemical processes starting from construction of the facility and continuing until many years after closure. Understanding the relevant processes of fracture evolution may be key to supporting the attendant safety arguments for such a facility. Experimental work has been examined wherein artificial fractures in novaculite and granite are subject to a mechanical confining pressure, variable fluid flows and different applied temperatures. This paper presents a synthesis of the work of seven separate research teams. A range of approaches are summarized including detailed thermal-hydrological-mechanical-chemical (THMC) models and homogenized ‘single compartment’ models of the fracture; the latter with a view to larger network or effective continuum models. The competing roles of aqueous geochemistry, pressure solution, stress corrosion and pure mechanics were found to be significant in the reproduction of the experimental observations. The results of the work show that while good, physically plausible representations of the experiment can be obtained, there is considerable uncertainty in the relative importance of the various processes, and that the parameterization of these processes can be closely linked to the physical interpretation of the fracture surface topography.

sted, utgiver, år, opplag, sider
American Rock Mechanics Association (ARMA), 2018.
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-241479Scopus ID: 2-s2.0-85059422972OAI: oai:DiVA.org:kth-241479DiVA, id: diva2:1281706
Konferanse
2nd International Discrete Fracture Network Engineering Conference, DFNE 2018, Seattle, United States, 20 June 2018 through 22 June 2018
Merknad

QC 20190123

Tilgjengelig fra: 2019-01-23 Laget: 2019-01-23 Sist oppdatert: 2019-01-23bibliografisk kontrollert

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RefereraExporteraLink to record
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  • apa
  • harvard1
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf