Monitoring the subsidence at different periods in high underground water level coal mine areas using differential interferometric synthetic aperture radar (D-InSAR)

Monitoring the subsidence at different periods in high underground water level coal mine areas can provide a data basis for land reclamation. For purpose of monitoring I working face located Guotun Coal Mine, 22 Sentinel-1 images were processed by using differential interferometric synthetic aperture radar (D-InSAR). After dividing periods, characteristics and accuracy explored. The results showed that: (1) formation single-gradient funnel is an important sign to identify active period. (2) root mean square error (RMSE) absolute (MAE) central area are reduced 50% 49%, respectively, compared with those edge area. (3) periods. coefficient determination (R2) reach more than 0.89. Therefore, D-InSAR technique accurately monitor based on data.