Advanced InSAR-SBAS method for determining the extent of mining-induced deformations

This paper presents a novel method for determining the extent of mining-induced ground subsidence using InSAR technology, specifically the SBAS time series. The study aimed to develop a precise approach for determining subsidence extent. The research was carried out in the Upper Silesian Coal Basin, located in central-eastern Europe (Poland), a region known for its long history of intensive hard coal mining. InSAR analysis used imagery from March 2015 to February 2022. The developed approach includes accuracy analysis of SAR images processed, data filtering, and evaluation of mining-induced asymmetry. The study established an empirical formula that links the subsidence extent to the depth of the mined deposit (H), found to be 1.16H with a standard deviation of 0.22H. This result is based on 138 limit points, exceeding traditional geodetic sample size. Improved precision enhances mining land safety, minimizing potential mining damage, and supporting spatial planning affected areas.