融合多种差分干涉测量的矿区地表形变监测.

In order to solve the problem that SBAS-InSAR technology cannot accurately estimate the deformation value of coal mine settlement center, differential InSAR was integrated with synthetic aperture radar. D-Insar and SBAS-InSAR techniques were used to study the monitoring method of surface deformation in mining area. Based on 25-scene Sentinel-1 data, the D-InSAR method based on coherence coefficient and the PS-InSAR were used. The SBAS-InsAR method of PS-InSAR respectively generated deformation maps of the study area. With the help of Kriging interpolation method, the results of the former method were filled in the deformation results of the latter method to improve the vacancy value of deformation in the mining area, so as to estimate the surface deformation results of the mining area more accurately. In addition, the deformation results of typical mining areas were analyzed in detail along the transverse and longitudinal sections of the mining face, and the surface deformation profile curve was drawn to analyze the evolution process of the subsidence funnel in the mining area. Finally, in order to quantitatively illustrate the reliability of this method, the errors of deformation results in mining area and leveling data were compared, and the standard deviation and root mean square difference were taken as the evaluation indexes of deformation accuracy in mining area. The results show that the overall quality of the coherence coefficient diagram is good, the maximum cumulative settlement can reach 176.39 mm in the study area, and the maximum annual average settlement rate can reach-103.82 mm/a. The deformation results are basically consistent with the leveling data, and the errors are all less than 13 cm. The monitoring accuracy meets the technical requirements of coal mining related measurement. [ABSTRACT FROM AUTHOR]