Hydrogeotechnical Services
Enhancing mining operations through integrated hydrogeological and geotechnical studies
Water & Mines
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An integrated approach for greater precision and reliability in engineering projects
The distribution of water levels and pore pressures is a key factor influencing the stability of geotechnical structures such as slopes, dams, foundations, and open pits. Variations in these variables directly affect the performance and safety of engineering works, potentially leading to risks such as slope instability, tunnel inflows, and structural failure.
Despite their critical importance, many geotechnical studies still rely on simplified methods to estimate groundwater levels—often based on isolated point measurements or analytical models with assumptions that are limited in spatial and temporal scope. This practice ignores regional underground flows, hydrogeological connectivity, seasonal fluctuations and fractures influence, increasing uncertainty in future prediction scenarios.
At Water Services and Technologies, we integrate geotechnical and hydrogeological modeling to deliver more realistic and reliable outcomes. We use advanced groundwater flow modeling tools such as FEFLOW and Visual MODFLOW, combined with geotechnical simulation software like PLAXIS and GeoStudio, to develop comprehensive models that support safer and more effective engineering designs.
Why integrate hydrogeological and geotechnical models?
- Accurate Stability Assessment: Three-dimensional underground flow models provide realistic pore pressure conditions.
- Reliable Simulations: Consideration of future scenarios such as dewatering, pit filling, dam de-characterization and climate change.
- Failure Prevention: Anticipation of risks and reduction of uncertainties in the project.
- Strategic Planning: Solid basis for critical decisions and safe interventions.
- Risk and Cost Reduction: More efficient projects with less likelihood of rework.
Services offered
2D and 3D Stability Analysis
2D and 3D slope stability analyses are critical for evaluating the safety and performance of mine pits and other geotechnical structures. These analyses allow for the identification of potential failure mechanisms, support informed design decisions, and help mitigate operational risks throughout the project lifecycle.
At Water Services and Technologies (WST), we combine geotechnical expertise with advanced hydrogeological modeling to deliver fully integrated assessments of slope behavior under both saturated and unsaturated conditions. Our approach considers transient pore pressure conditions, regional groundwater flow, seasonal fluctuations, and the effects of dewatering and recharge.
We use industry-leading tools such as FEFLOW and Visual MODFLOW for groundwater flow simulation, and PLAXIS LE and GeoStudio for geotechnical stability modeling. This integrated workflow provides a realistic and dynamic representation of coupled hydrogeological–geomechanical interactions, which is essential for high-stakes environments such as mine operations, tailings dams, and critical infrastructure.
Our capabilities include:
- Specialized 2D and 3D slope stability analysis using limit equilibrium and finite element methods in PLAXIS LE/FE and GeoStudio (Slope/W, Sigma/W).
- Coupled hydrogeological–geotechnical modeling, accounting for both steady-state and transient pore pressures.
- Geotechnical design and evaluation for slopes, dams, embankments, deep excavations, open pits, and tailings facilities.
- Sensitivity and probabilistic analysis to assess safety factor under varying geologic and hydrologic conditions.
- Design of groundwater control strategies, including dewatering wells, drainage galleries, and slope depressurization.
- Assessment of climate change and extreme rainfall scenarios on slope stability.
- Support for mine closure and post-operational stability planning.
This integrated geotechnical–hydrogeological approach results in more accurate risk assessments, optimized design, and improved project sustainability.
Stress-Strain Modeling for Geotechnical Structures
Stress–strain modeling plays a critical role in evaluating the deformation, strength, and long-term stability of geotechnical structures. Incorporating groundwater conditions into these models is essential, as pore pressure variations have a significant influence on soil behavior and the mechanical response of structures under loading.
At Water Services and Technologies (WST), we develop advanced numerical models that integrate groundwater flow simulations with stress–strain analyses. This approach enhances the understanding of how geotechnical structures — including foundations, slopes, retaining walls, and open pit walls — respond to both hydraulic and mechanical loads.
Our services include:
- Advanced stress–strain modeling for geotechnical and mining applications, using finite element methods with tools such as PLAXIS 2D/3D and SIGMA/W.
- Coupled hydro-mechanical simulations, capturing interactions between pore pressure evolution and soil deformation under transient or steady-state groundwater conditions.
- Integration of groundwater flow and deformation models to simulate real-world scenarios, including excavation-induced stress redistribution, rainfall infiltration, and dewatering impacts.
This integrated modeling approach reduces uncertainty and improves predictive capacity for both short- and long-term geotechnical performance, leading to safer and more cost-effective designs.
Predictive Groundwater Flow Scenarios for Mining Pits and Geotechnical Structures
Predictive groundwater flow analysis is essential for ensuring the long-term performance and safety of geotechnical structures such as mine pits, waste dumps, and tailings storage facilities. Through advanced numerical modeling, these simulations allow engineers and decision-makers to anticipate changes in pore pressure, seepage patterns, and water balance over time, improving the reliability of geotechnical designs and the effectiveness of water management strategies.
At Water Services and Technologies (WST), we deliver high-resolution predictive groundwater modeling to support a comprehensive understanding of hydrogeological behavior and its direct impact on geotechnical performance. Our approach integrates site-specific geological and hydrological data enabling more accurate forecasting of hydraulic behavior across the entire project lifecycle.
Our services include:
- Numerical groundwater flow modeling to support long-term evaluation of mine sites and critical geotechnical structures such as waste dumps, TSFs (tailings storage facilities), and open pits.
- Assessment of future groundwater conditions under evolving scenarios, including dewatering, progressive excavation, land use changes, and climate variability.
- Integration of groundwater simulations with geotechnical risk analysis, helping to identify zones of elevated pore pressure, seepage risks, and hydraulic connectivity.
- Support for the development of risk management plans and mitigation strategies, tailored to evolving site conditions and operational phases.
- Decision-making support for design optimization, environmental compliance, and safe water control planning throughout the project’s life cycle.
By combining hydrogeological expertise with advanced modeling tools such as FEFLOW and Visual MODFLOW, WST helps clients reduce uncertainty, improve long-term planning, and ensure the structural integrity of mine and infrastructure projects under complex groundwater regimes.
Tailings Consolidation Analysis
Consolidation analysis of tailings is a critical component in the design and management of tailings storage facilities (TSFs), as it directly influences both the structural stability of the deposit and the efficiency of water recovery and reuse. By simulating the long-term settlement behavior of tailings and the dissipation of excess pore pressure, consolidation modeling supports the development of safer, more sustainable, and economically viable disposal strategies.
At Water Services and Technologies (WST), we offer advanced consolidation analyses for tailings to assist clients in optimizing water management and improving the planning and performance of disposal operations. These analyses provide valuable insights into the time-dependent mechanical behavior of tailings under varying conditions, contributing to informed decision-making and regulatory compliance.
Our services include:
- Consolidation modeling of tailings to support efficient water balance assessments and disposal planning, enhancing operational and environmental performance.
- Evaluation of time-dependent deformation and settlement behavior of tailings under self-weight and external loads, including staged deposition, embankment construction, or surcharge loading.
- Simulation of pore pressure dissipation over time, allowing for better planning of drainage systems, stability evaluations, and scheduling of operational phases.
- Integration of consolidation results into water availability forecasts, helping clients optimize water recovery and ensure responsible resource use.
- Development of safer and more sustainable deposition strategies, tailored to long-term facility performance, closure objectives, and climate considerations.
Related Projects
Study for the Closure and Decommissioning of Gongo Soco Mine
Implementation and Updating of Vale’s Global Mining Environmental and Hydrogeological Database
Assessment of Sulfate-Impacted Area in Tailings Dam
Scenario Simulations for Underground Mine Dewatering
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