Advancements in hydromechanical simulation

doi:10.36487/ACG_repo/2435_G-03

Authors: Chung, T; Dehkhoda, S; Flatten, A; Levkovitch, V

DOI https://doi.org/10.36487/ACG_repo/2435_G-03

Cite As:
Chung, T, Dehkhoda, S, Flatten, A & Levkovitch, V 2024, 'Advancements in hydromechanical simulation', in Daniel Johansson & Håkan Schunnesson (eds), MassMin 2024: Proceedings of the International Conference & Exhibition on Mass Mining, Luleå University of Technology, Luleå, pp. 907-916, https://doi.org/10.36487/ACG_repo/2435_G-03

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Abstract:
The significance of hydrogeological simulations in mine-scale modelling cannot be overstated. Accurate hydrogeological models are pivotal for ensuring mine safety, predicting environmental impacts, and planning for potential mine closures. These simulations provide insights into groundwater behaviours and fluid-rock interactions, which are critical for informed decision-making in mining operations. Recognizing the limitations of traditional hydro simulations, which often rely on assumptions like steady-state and fully saturated flow, we have pioneered a cutting-edge hydro framework. This approach offers a more realistic representation of subsurface water dynamics. The traditional methodologies, although foundational, can sometimes oversimplify complex hydrogeological phenomena, potentially leading to inaccurate predictions. Our innovative framework, built on the open-source parallel finite element framework MOOSE, encapsulates real physics, emphasizing unsaturated flow dynamics and accounting for geological inconsistencies such as faults. It is equipped with realistic boundary conditions, including drainage, rainfall, and the nuanced interaction between flexible flux and pore water pressure. By adopting an element-based approach to material properties, the model ensures that parameters like permeability, porosity, and saturation parameters are not generalised but tied to specific geological domains up to elements. Furthermore, the fully transient nature of our simulation allows for time-dependent observations, providing an evolving perspective of the mine's hydrogeological landscape. Notably, the framework's ability to simulate pit reflooding sets it apart, addressing a crucial aspect of mine safety and environmental conservation. These unique features of our novel framework not only elevate the accuracy and depth of mine scale hydromechanical simulations but also underscore the need for continuous innovation in the realm of hydrogeological modelling.

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