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合成孔径雷达差分干涉测量(Differential Interferometic SAR,D-InSAR)技术可以快速、精确、大范围地监测地表形变,为矿区开采沉陷的监测和防治提供了有效手段。以安徽淮南淮河以北矿区为研究区,获取了3景高分辨率TerraSAR-X影像,分别利用二轨法、三轨法D-InSAR技术提取2010年11月22日~2011年4月25日的沉陷情况。结果显示:在这期间淮南矿区发生了大量沉陷,最大沉陷量为-71mm,位于丁集矿区;顾桥顾北矿区和潘集矿区的最大沉陷量约为-50和-45mm,两种方法提取出的沉陷区位置、形态与实际情况基本稳合,沉陷速率与相关研究大体一致,表明利用短时空基线的高空间分辨率TerraSAR-X数据能够对淮南矿区的地表形变量和形变范围进行高精度的监测。同时,将两种方法提取的结果对比分析发现,在缺乏精细DEM数据的情况下,三轨法在平原区的应用效果优于二轨法。
Synthetic Aperture Radar Differential Interferometry (D-InSAR) technique can monitor surface deformation quickly, accurately and extensively, and provides an effective method for monitoring and controlling subsidence in mining area. Three high-resolution TerraSAR-X images were obtained from the mining area north of the Huaihe River in Huai’nan, Anhui Province, and were extracted using the two-track method and the three-track D-InSAR technique. November 22, 2010 to April 25, 2011 The sinking situation. The results show that during this period a large number of subsidence occurred in Huainan mining area, with the maximum subsidence of -71mm and located in Dingji mining area. The maximum subsidence of Guqiao and Panji mining areas in Guqiao was about -50 and -45mm, respectively. The settlement of the subsidence area is basically consistent with the actual situation. The subsidence rate is generally consistent with the related studies, which shows that using the high spatial resolution TerraSAR-X data of the short-space time base can accurately measure the surface deformation and the deformation range of the Huainan mining area, Monitoring. At the same time, comparing the results extracted by the two methods, it is found that the application of the three-track method in the plain area is superior to the two-track method in the absence of the fine DEM data.