Geomechanical modelling

Geomechanical modelling simulates the mechanical behaviour of the Earth's crust in response to stress and deformation. It considers the interactions between thermal, hydraulic, mechanical, and chemical (THMC) processes to study fault mechanics, earthquake generation, and the effects of stress changes on seismic activity.

By combining field data, laboratory experiments, and advanced computational techniques, numerical models of coupled processes enhance our understanding of earthquakes and support risk mitigation strategies.

Coupled THMC processes

Geomechanical models capture the interactions between thermal, hydraulic, mechanical, and chemical (THMC) processes. These coupled simulations are essential for understanding the complex behaviour of the subsurface and support research in underground laboratories such as BedrettoLab and the Mont Terri Rock Laboratory. In particular, they play a key role in developing forecasting models for induced seismicity. Their applications extend across various GeoEnergy and earthquake-related studies, including:

  • Earthquake source physics
  • Nuclear waste disposal
  • Geothermal energy projects
  • CO2 storage
  • Physics-based modelling approaches linked to machine learning
Schematic representation of the coupled thermo-hydro-mechanical-chemical processes in the subsurface

Schematic representation of the coupled thermo-hydro-mechanical-chemical processes in the subsurface

Advancements in geomechanical modelling

Developing reliable models of coupled THMC processes requires integrating knowledge from disciplines such as geomechanics, hydrogeology, geochemistry, and seismology. Only through constant advances in numerical modelling can underground processes be reproduced in detail. To achieve this, the implementation of new numerical codes is closely linked to the development of new physical and empirical laws, as well as observations from laboratory experiments and in-situ observations, and from nature. Research in the field of geomechanical modelling is therefore closely connected to all other fields of research.

The geomechanical modelling group is led by PD Dr. Antonio P. Rinaldi.