基于D-InSAR技术的矿区地表沉陷监测

Surface subsidence monitoring in mining area based on D-InSAR

结合D-In SAR技术全天时、全天候、高分辨率和连续空间覆盖等特点,基于7景Terra SAR-X影像数据,采用二轨差分方法,得到山东南屯矿地表沉陷D-In SAR数据,与水准数据进行对比。根据二者的差值与距离的关系,采用最小二乘多项式拟合的方法,得到D-In SAR数据的修正公式。修正后D-In SAR数据的精度满足地表形变监测的需求,具有广阔的应用前景。

Combining with the features of D-InSAR technology, which is available day and night, and can provide high- resolution images and realize continuous spatial coverage, based on two- track differential interferometric, this paper analyzes 7 scenes Terra SAR-X to get the D-InSAR data of surface subsidence of a mine in Shandong, and then compares with the leveling data. According to the differential value between the D-InSAR data and leveling data and the distances, the modified formula of D-InSAR data is obtained using the least-square polynomial fitting method. After the modification, the accuracy of D-InSAR data meets the requirements of surface deformation monitoring, which holds broad application foreground.