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17 February 2011
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Depth-averaged flowslides model: validation and application to tailings dams and waste dumps failures
Dewals, Benjamin  ; Archambeau, Pierre  ; Detrembleur, Sylvain  et al.
2011 • In Chanson, Hubert (Ed.) Proc. of the 34th IAHR World Congress: Balance and Uncertainty: Water in a Changing World
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Keywords :
Granular flow; flowslide; frictional fluid; yield stress; finite volume; multiblock flow model; debris flow
Abstract :
[en] Flowslides induced by the failure of tailing dams or waste dumps constitute significant industrial hazards. Examples in the past have demonstrated their high potential for casualties and damage. Geotechnical analyses provide nothing more than the failure criteria. In contrast, once the structure fails, the fluidized material propagates rapidly as a non-Newtonian flow, requiring thus a hydraulic analysis. This paper presents an advanced 2D depth-averaged flow model which accommodates the particular rheology of flowslides, including visco-plasticity and frictional behavior accounting for pore pressure. Based on mass and momentum conservation for the mixture of soil and interstitial fluid, the finite volume model handles flow propagation on dry areas and includes an original treatment of the yield stress in 2D. At a crossroads of geotechnical and hydraulic engineering, the paper depicts the elaboration and validation of a new model readily available for hazard mapping, including extent of affected areas, maximum depths and arrival time.
Research center :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Dewals, Benjamin  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Archambeau, Pierre ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Detrembleur, Sylvain ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien  ;  Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Pirotton, Michel ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Language :
English
Title :
Depth-averaged flowslides model: validation and application to tailings dams and waste dumps failures
Publication date :
2011
Event name :
34th IAHR World Congress - Balance and Uncertainty: Water in a Changing World
Event organizer :
International Association for Hydro-Environment Engineering and Research
Event place :
Brisbane, Australia
Event date :
26 June to 1 July 2011
Audience :
International
Main work title :
Proc. of the 34th IAHR World Congress: Balance and Uncertainty: Water in a Changing World
Editor :
Chanson, Hubert
Peer reviewed :
Peer reviewed

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