InSAR测量技术在矿区地表沉降监测中的应用

摘要

为了探讨InSAR测量技术在矿区进行地表沉降监测的可行性,首先采用传统的GPS测量矿区的地表沉降情况,并获得GPS地表沉降监测数据,然后采用瑞士的GAMMA软件处理矿区的主辅两景InSAR影像,通过相位解缠等操作最终得到矿区地表的沉降图。以淮北某矿区一个工作面的地面观测数据为例,通过仿射变换进行坐标转换把地面上GPS观测点转换到对应的InSAR栅格数据阵列中,对比分析二者的观测数据,可以发现InSAR监测结果与GPS观测结果具有一致性,能够满足矿区地表沉降监测的精度要求。%In order to discuses the feasibility of the InSAR applied to monitor and measure the surface ground subsidence in the mining area,firstly the conventional GPS was applied to measure the surface ground subsidence in the mining area.The GPS points should be rationally distributed and the GPS measuring method should be selected.Thus the GPS monitoring and measuring data of the surface ground subsidence could be obtained.Then the Swiss GAMMA software would be applied to process the two scene InSAR images.A surface ground subsidence drawing of the mining area would be obtained with the phase unwrapping and other operation.Taking a surface ground observation data of a coal mining face in a mining area as an example,an affine transformation was applied to the coordinate conversion to convert the GPS observation point at the surface ground to the related InSAR grid data array.With the comparison and analysis on the observation data of the above two,there was coherence between the InSAR monitoring and measuring results and the GPS observation results and those results could fully meet the accuracy requirement of the surface ground monitoring and measuring in the mining area.