关键词: 时序DInSAR, 重复采动, 超前影响角, 边界角, 起动距, TerraSAR-X

Abstract: The high resolution TerraSAR-X SAR data was used to monitor ground subsidence caused by underground coal mining activities with time-series DInSAR method. Analysis was made based on the detailed stoping records of the related working face. With the identified bounds of subsidence, some angular parameters, such as advanced influence angle, angle of subsidence and moving distance were derived. These parameters could be used to depict the evolution of ground subsidence caused by repeated coal excavation, which is quite different compared with subsidence caused by the first mining. In the end, terrestrial GPS surveying results, which were carried out at the same date when SAR image was acquired, were used to evaluate the DInSAR technology. The results confirm the reliability and validity of X-band SAR data in terms of subsidence boundary extraction and related angular parameters derivation, thus promoting the quantitative application of DInSAR technology.

Key words: time-series DInSAR, repeated excavation, advanced influence angle, angle of subsidence, moving distance, TerraSAR-X