On 12^th May 2022, there was a scientific seminar at the Faculty of Mining Surveying and Environmental Engineering, during which Visiting Professor Pietro Teatini presented a short lecture titled ‘Advanced 3D continuous and discontinuous geomechanical modelling of stress and deformation fields due to subsurface fluid withdrawal and injection’. Pietro Teatini is a professor in Hydrology and Hydraulic Engineering at the Department of Civil, Environmental and Architectural Engineering, University of Padova, Italy.

The main topic of the meeting was the modelling of surface movements of discontinuous deformation caused by fluid withdrawal and injection. The Professor showed that basic modelling techniques are focused mainly on vertical movements and quite often they do not consider the existence of faults of earth fissures. In a presented advanced approach, it is possible to include discontinuous deformations and model both, the vertical and horizontal displacements, which are important considering local people and infrastructure. Professor Teatini also presented 3 case studies, where the advanced methodology of geomechanical modelling was applied, which were located in China, the Netherlands and the USA. Each case study was focused on a different aspect of modelling, addressing the following issues: fissures modelling, threats connected with faults reactivation including induced seismicity and modelling of horizontal displacements. The seminar ended with a short discussion about deformation caused by fluid withdrawal and injection, approaches to their modelling and problems connected with this topic.