融合D-InSAR与PS-InSAR的神东矿区开采沉陷监测方法

Integrated Monitoring Method of the Mining Subsidence of Shendong Mining Area Based on D-InSAR and PS-InSAR Technology

针对神东矿区地表变形区域多、分布范围广等问题,采用常规合成孔径雷达差分干涉测量技术(Different Interferometric Synthetic Aperture Radar,D-InSAR)对矿区地表变形区进行了大范围筛查,同时结合永久散射体合成孔径雷达干涉测量技术(Persistent Scatterer Interferometric Synthetic Aperture Radar,PS-InSAR)监测地表变形区的长时间序列变化特征。结合2016年10月-2017年6月获取的神东矿区北部鄂尔多斯地区21景Sentinel-1影像,采用D-InSAR技术进行处理,获取矿区地表变形信息,揭示矿区地表变形在时间与空间上的演变过程。研究表明:利用差分干涉图共解译出了35处较为明显的地表变形区域,结合PS-InSAR技术获取的变形图,通过影像解译和实地调查,认为造成地表变形的主要因素为露天矿开采造成的边坡失稳和煤矿地下开采引起的地表塌陷,此外,通过D-InSAR技术监测到的变形区与实地调查结果吻合性较好,表明采用该技术进行矿区地表变形监测与分析效果较好。

In view of the large number of surface deformation zones and wide distribution range in Shendong mining area,the conventional D-InSAR(different interferometric synthetic aperture radar)technology is used to screen the surface deformation zone of the mining area,and the long-term sequence variation of the surface deformation zone is monitored by PS-InSAR(persistent scatterer interferometric synthetic aperture radar)technology.Based on the 21 images of Sentinel-1 in the Ordos area of the north of Shendong mining area from October 2016 to June 2017,the D-InSAR process is performed to obtain the surface deformation information of the mining area,and to reveal the evolution process of surface deformation in time and space.The study results show that 35 obvious surface deformation regions are interpreted by differential interferogram,and the deformation map is obtained by combining PS-InSAR technology.Through optical image interpretation and field investigation,it is analyzed that the main factors causing surface deformation are the slope instability caused by open pit mining and collapse caused by underground mining.In addition,the deformation regions detected by D-InSAR have different degrees of deformation in the field,they are basically consistent with each other,which verifies the reliability of D-InSAR technology in the monitoring and analysis of mining subsidence.