A method for extracting sub-regional deformation of mining subsidence based on SAR technology

Abstract

Aiming at the problem of low applicability of differential interferometric synthetic aperture radar(DInSAR) and offset tracking(OT) technologies in the intersection area of small-scale and large-scale deformation in the edge and center of the subsidence basin, a method for extracting sub-regional deformation of mining subsidence by fusing cumulative DInSAR and adaptive OT is proposed. The method using the coherence coefficient and surface deformation gradient as thresholds to classify mining subsidence basins into three areas of different deformation scales. This paper takes 52303 working face mining subsidence basin of Daliuta Coal Mine as the study object, by combining with the surface measured data of the same period, the root mean square error(RMSE) of the medium scale deformation results by fusion method is less than 0.05 m, the RMSE of the study area is less than 0.11 m. It provides a new method for achieving fine monitoring of mining subsidence basins.

Keywords

• dinsar
• offset tracking(ot)
• weighted fusion
• mining subsidence
• deformation monitoring