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Numerical simulations of water flow and contaminants transport near mining wastes disposed in a fractured rock mass

Farouk Ben Abdelghani, Michel Aubertin, Richard Simon and René Therrien

Article (2015)

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Cite this document: Ben Abdelghani, F., Aubertin, M., Simon, R. & Therrien, R. (2015). Numerical simulations of water flow and contaminants transport near mining wastes disposed in a fractured rock mass. International Journal of Mining Science and Technology, 25(1), p. 37-45. doi:10.1016/j.ijmst.2014.11.003
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Abstract

A numerical tool, called Hydro-Geosphere, was used to simulate unsaturated water flow and contaminants migration around an open pit filled with mining wastes. Numerical simulations had been carried out to assess the influence of various factors on water flow and solute transport in and around the surface openings including recharge, properties of the waste material and presence of fractures in the surrounding rock mass. The effect of the regional hydraulic gradient was also investigated. The analyses were conducted by simulating various 2D cases using experimentally obtained material properties and controlled boundary conditions. The effects of the hydrogeological properties of the filling material (i.e., water retention curve and hydraulic conductivity function), fracture network characteristics and conductivity of the joints were assessed. The results illustrate that fractures control water flow and contaminants transport around the waste disposal area. A fracture network can desaturate the system and improve the regional gradient effect.

Uncontrolled Keywords

Hydro-Geosphere, Numerical modelling, Unsaturated water flow, Contaminants transport, Tailings, Waste rocks

Open Access document in PolyPublie
Subjects: 1000 Génie civil > 1000 Génie civil
1000 Génie civil > 1005 Génie hydraulique
1000 Génie civil > 1007 Ressources et approvisionnement en eau
Department: Département des génies civil, géologique et des mines
Research Center: Autre
Funders: CRSNG/NSERC, Research Institute on Mines and the Environment (RIME UQAT-Polytechnique)
Date Deposited: 14 Jul 2021 11:11
Last Modified: 15 Jul 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4778/
Document issued by the official publisher
Journal Title: International Journal of Mining Science and Technology (vol. 25, no. 1)
Publisher: Elsevier
Official URL: https://doi.org/10.1016/j.ijmst.2014.11.003

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