Application Analysis on Surface Deformation of Coal Mine Goaf Based on InSAR Technology

In order to timely and accurately monitor the surface subsidence situations of mining areas, based on SBAS-InSAR time series analysis technology, 18 scenes Sentinel-1A images from the two periods of 20201031-20210429 and 20211107-20220506 are utilized to process the data through InSAR time series technology. The vertical deformation accumulated deformation characteristics of of South to North Water Diversion and Storage in Heze City and Water Supply Guarantee Project in Zhaolou check-gate area are obtained by the research. The accumulated subsidence volume within a range of 500 m around the Zhaolou check-gate in the target area is between −20 mm and 10 mm, and the surface accumulated subsidence volume at the location of the check-gate is between −7 mm-8 mm and −16 mm-−3 mm, respectively. This data provides reliable data support for the stability evaluation of the goaf foundation in this area.