Identification of mining subsidence hazard areas based on joint time series InSAR technology
A methodology is proposed to address the limitations in accuracy and reliability of the current single InSAR techniques for complex ground deformation analysis.By combining two time series InSAR techniques,PS-InSAR(persist scatterers InSAR)and SBAS-InSAR(small base-line subsets InSAR),a comprehensive delineation of potential subsidence hazard areas in mountainous mining regions is achieved.Taking the Songyi mining area in Yidu,Hubei Province as an example,the high-precision PS point deformation results within the mining area are utilized to calibrate the SBAS-InSAR processing outcomes,which possess high spatial coverage.This approach improves the accuracy of ground deformation monitoring and enhances the precision of area delineation.The reliability of the interpretation results is validated by comparing the time-series curves of typical deformation points obtained using the single PS-InSAR technology and the joint PS-SBAS method,as well as the on-site field investigations.This research shows that the joint time series InSAR technology can elevate the monitoring accuracy of ground subsidence and enhance the precision of area delineation,and offer new technological insights for monitoring and analyzing ground subsidence hazards in similar mountainous mining regions.
mountainous areas in western Hubeiground subsidence in mining areadeformation monitoringjoint time series InSAR technology
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