scholarly journals Reactive Transport Modeling of a Historic Waste Rock Pile at the Detour Lake Gold Mine

2018 ◽  
Author(s):  
Phillip Dagenais
Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 565
Author(s):  
Xueying Yi ◽  
Danyang Su ◽  
Bruno Bussière ◽  
K. Ulrich Mayer

In order to reduce contaminant mass loadings, thermal cover systems may be incorporated in the design of waste rock piles located in regions of continuous permafrost. In this study, reactive transport modeling was used to improve the understanding of coupled thermo-hydrological and chemical processes controlling the evolution of a covered waste rock pile located in Northern Canada. Material properties from previous field and laboratory tests were incorporated into the model to constrain the simulations. Good agreement between simulated and observational temperature data indicates that the model is capable of capturing the coupled thermo-hydrological processes occurring within the pile. Simulations were also useful for forecasting the pile’s long-term evolution with an emphasis on water flow and heat transport mechanisms, but also including geochemical weathering processes and sulfate mass loadings as an indicator for the release of contaminated drainage. An uncertainty analysis was carried out to address different scenarios of the cover’s performance as a function of the applied infiltration rate, accounting for the impacts of evaporation, runoff, and snow ablation. The model results indicate that the cover performance is insensitive to the magnitude of recharge rates, except for limited changes of the flow regime in the shallow active layer. The model was expanded by performing an additional sensitivity analysis to assess the role of cover thicknesses. The simulated results reveal that a cover design with an appropriate thickness can effectively minimize mass loadings in drainage by maintaining the active layer completely within the cover.


2009 ◽  
Vol 8 (4) ◽  
pp. 1038-1050 ◽  
Author(s):  
Júlio César da Silva ◽  
Eurípedes do Amaral Vargas ◽  
Ondra Sracek

2018 ◽  
Vol 17 (1) ◽  
pp. 180119 ◽  
Author(s):  
Bas Vriens ◽  
Mélanie St. Arnault ◽  
Laura Laurenzi ◽  
Leslie Smith ◽  
K. Ulrich Mayer ◽  
...  

2020 ◽  
Vol 54 (19) ◽  
pp. 12092-12101
Author(s):  
Paula Rodríguez-Escales ◽  
Carme Barba ◽  
Xavier Sanchez-Vila ◽  
Diederik Jacques ◽  
Albert Folch

2015 ◽  
Vol 537 ◽  
pp. 277-293 ◽  
Author(s):  
M.M. Rahman ◽  
M. Bakker ◽  
C.H.L. Patty ◽  
Z. Hassan ◽  
W.F.M. Röling ◽  
...  

2015 ◽  
Vol 18 (2) ◽  
pp. 310-328 ◽  
Author(s):  
P. Gamazo ◽  
L. J. Slooten ◽  
J. Carrera ◽  
M. W. Saaltink ◽  
S. Bea ◽  
...  

Reactive transport modeling involves solving several nonlinear coupled phenomena, among them, the flow of fluid phases, the transport of chemical species and energy, and chemical reactions. There are different ways to consider this coupling that might be more or less suitable depending on the nature of the problem to be solved. In this paper we acknowledge the importance of flexibility on reactive transport codes and how object-oriented programming can facilitate this feature. We present PROOST, an object-oriented code that allows solving reactive transport problems considering different coupling approaches. The code main classes and their interactions are presented. PROOST performance is illustrated by the resolution of a multiphase reactive transport problem where geochemistry affects hydrodynamic processes.


2021 ◽  
Vol 38 (3) ◽  
pp. 109-114
Author(s):  
Hang Deng ◽  
Alexis Navarre-Sitchler ◽  
Elanor Heil ◽  
Catherine Peters

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