Thermal Management in Deep Mining Systems
Summary
Deep mining operations are increasingly venturing to greater depths to access mineral reserves, exposing work faces and infrastructure to elevated geothermal heat and rock stress. Effective thermal management is critical to maintain safe working temperatures, to protect equipment performance and to ensure energy-efficient operations. Common strategies include optimised ventilation networks, which introduce fresh air while removing heat and contaminants; active refrigeration systems, utilising compressors and heat exchangers to cool intake air; and passive methods such as thermal insulation and ground anchoring materials to block conductive heat transfer. Recent advances integrate sensor networks and digital twins to model heat fluxes in real time, enabling adaptive control of airflow and refrigeration loads. The global imperative to reduce greenhouse-gas emissions has driven research into energy-saving cooling cycles and waste-heat recovery, which repurpose exhaust heat for on-site power generation or district heating. Collectively, these approaches aim to balance human comfort, machinery lifespan and operational costs, while meeting stringent safety and environmental standards.
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Thermal Management in Deep Mining Systems publication trend
The graph below shows the total number of articles in thermal management in deep mining systems across all publications each year (not limited to Nature Index journals).
Technical terms
Geothermal gradient: The rate at which rock temperature increases with depth, typically measured in degrees Celsius per 100 metres.
Ventilation system: A network of fans, ducts and control dampers designed to circulate fresh air into mine workings and remove heat and contaminants.
Liquid nitrogen injection: An active cooling technique in which cryogenic nitrogen is introduced to absorb heat via rapid expansion and evaporation.
Heat flux: The rate of thermal energy transfer through a unit area, often used to quantify conductive and convective heat loads.
Digital twin: A virtual model replicating mine geometry, ventilation and thermal parameters, enabling predictive simulation and real-time optimisation.
References
- Moving towards deep underground mineral resources: Drivers, challenges and potential solutions. Resources Policy (2023).
- Study of energy-efficient heat resistance and cooling technology for high temperature working face with multiple heat sources in deep mine. International Journal of Coal Science & Technology (2023).
- Opportunities and Challenges in Deep Mining: A Brief Review. Engineering (2017).
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