SURFACE DEFORMATION MONITORING AND ANALYSIS IN XINJING MINING AREA BASED ON SBAS-INSAR TECHNOLOGY

Large-scale mining activities in mining areas can induce surface deformation phenomena, threatening the stability of peripheral production systems and residential environmental safety. Consequently, implementing high-precision surface deformation monitoring has become a critical component of mine safety assessment systems and ecological restoration projects. This study takes the Xinjing Mining Area in Alxa League, as a case study. Utilizing 20 scenes of Sentinel-1 ascending orbit images acquired from January 2022 to December 2023, this study applied the SBAS-InSAR technique for deformation monitoring and analysis. The results demonstrated complex deformation patterns in the Xinjing Mining Area during the study period, primarily characterized by subsidence. The deformation rate across the study area ranged from -125.8 mm/a to +36.3 mm/a, with cumulative deformation magnitudes ranging from -213.3 mm to +76.7 mm. The deformation process evolved through three distinct phases: an accelerated deformation phase, a moderate deformation phase, and a stabilization phase. This study provides essential data support and a scientific basis for preventing mining-induced subsidence caused by engineering activities in mining areas.