应用InSAR技术测量矿山沉降与变化分析——以河北武安矿区为例

卫星合成孔径雷达干涉(InSAR)技术,已经发展成为一种测量地表微小形变的有力工具。河北省武安地区,采矿活动造成多处矿山出现不同程度的地面形变,引起较多的地质灾害,测量沉陷的位置和强度,分析其变化趋势,才能制定相关治理措施。本文利用InSAR技术处理了自1992年以来该地区积累的数十景Jers-1和ENVISAT雷达数据。经过对数据的时相、基线距等的参数分析,选择了最优的像对组合,确定了可行的处理方案,获得了不同像对的差分干涉图像,从而获得了不同时期采矿造成的地面沉降分布及幅度信息。以惠兰村为例分析了矿区沉降区域和沉降量的演变过程。通过测量河北武安矿山开采沉降的InSAR技术应用,总结了干涉技术的处理流程及关键技术;最后,对干涉处理结果进行了评价分析。

Measuring Mining Induced Subsidence by Using InSAR Technique——Taking Wuan Mining Area in Hebei as An Example

The InSAR technique has become one of the important tools to measure small surface deformation.In Wuan region of Hebei province,surface deformation occurs to different degrees due to mining activity,causing more geologic disasters.It is necessary to determine the scope and extent of surface subsidence and analyze the changing trend for working out actual resolved plan.In this paper,many pairs SAR data,Jers-1 and ENVISAT SAR data from 1992,were used in InSAR processing.The best SAR pairs were selected and feasible technique plan was determined and the different D-InSAR images were obtained according to the time and baseline of SAR pairs.Finally,the scope and extent information at different periods were acquired.Besides,taking Huilan village as a example shows the mineral area subsidence evolvement procedure.The process flow and key step of InSAR technique are summarized by the application of Wuan subsidence measurement.In the end,the result of InSAR application is evaluated.