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CGS-IAH Conf. Niagara Falls 2002 (to be published -confidential) ANALYSES NUMRIQUES DES COULEMENTS NON SATURS
 

Summary: CGS-IAH Conf. Niagara Falls 2002 (to be published - confidential)
ANALYSES NUMÉRIQUES DES ÉCOULEMENTS NON SATURÉS
DANS DES HALDES À STÉRILES
Omar Fala1
, Michel Aubertin1
*, Bruno Bussière2
, Robert P. Chapuis1
1- École Polytechnique, PO Box 6079, Stat. Centre-Ville, Montréal, QC, Canada, H3C 3A7,
2- Université du Québec en Abitibi-Témiscamingue, 445 boul. de l'Université, Rouyn-Noranda, Qc,
Canada, J9X 5E4
* Auteur à contacter. Tel. 514-340-4711, ext. 4046 ; fax. 514-340-4477 ; michel.aubertin@polymtl.ca
ABSTRACT
The authors present in this paper a numerical study of unsaturated flow in rock wastes piles. The objectives of this
investigation are to evaluate, and eventually better control, water movements in wastes dumps. This aspect is
particularly important for cases where acid mine drainage (AMD) may be produced. The simulations of unsaturated flow
have shown that to control the movement of water, layers of fine grained materials can be placed within the coarser
waste rocks. However, adding horizontal layers of such fine materials may not be sufficient; in some cases, this can even
create larger wet zones likely to amplify the effects of AMD. A gentle slope of the fine layers, leaning towards the outside
of the dump, can help overcome this problem. Such inclined layers prevent internal drainage within dumps, as water is
routed to the perimeter owing to 2D capillary barrier effects. This in turn helps in keeping dry the internal part of the pile,

  

Source: Aubertin, Michel - Département des génies civil, géologique et des mines, École Polytechnique de Montréal

 

Collections: Engineering; Environmental Management and Restoration Technologies