Modelling the geometry of displacements caused by mining-induced tremors based on InSAR measurements

Mining-induced seismic events generate ground surface displacements that can significantly impact infrastructure. This study presents a geometric analysis of ground surface displacements caused by mining-induced tremors using remote sensing techniques, particularly Differential Interferometric Synthetic Aperture Radar (DInSAR).The research focuses on two seismic events in the Legnica-Głogów Copper District (LGCD), Poland, examining displacement fields through SAR imagery from Sentinel-1 satellites. The Geometry of the displacement field was described with a function of stochastic medium displacement and Aviershin’s observation. The centre of gravity of the displacement field, its impact radius, and proportionality coefficient for vertical and horizontal displacement were determined. The results confirm the suitability of this model in describing mining-induced subsidence troughs, with high agreement between measured and calculated displacement values. Additionally, the study identifies systematic deviations in DInSAR - derived measurements, suggesting necessary corrections for improved accuracy. The findings contribute to a better understanding of ground surface deformation process and offer insights into refining predictive models for mining-induced subsidence.