双轨D-InSAR在济宁矿区地面沉降监测中的应用

摘要

合成孔径雷达差分干涉测量技术(differential interferometry synthetic aperture radar,D-InSAR)已在矿区地面沉降监测中得到了广泛的应用.结合收集到的水准数据,选取了2009-01-10至2009-02-25时间段内的两景覆盖济宁东滩矿区的ALOS PARSAR数据,并以1∶50 000的数字高程数据(digital elevation model,DEM)作为外部参考DEM,利用GAMMA软件中的双轨D-InSAR技术对矿区的地面沉降进行监测,获取了东滩矿区的差分干涉图、增强后的干涉图、相干图、沉降图等一系列结果图,并统计分析东滩矿区在该时间段的沉降量、沉降分布及沉降面积等信息;将地理编码后的沉降图与最邻近时间段的水准数据进行精度验证及分析.结果表明:双轨D-InSAR技术可以对矿区的地面沉降进行有效的监测.%D-InSAR (differential interferometry synthetic aperture radar) has been widely used in monitoring mining-induced subsidence.Considering the collected leveling-measured data,two ALOS PALSAR images covering Dongtan mine area of Jining from 2009-01-10 to 2009-02-25 were processed to monitor mining-induced subsidence based on GAMMA,and the external DEM is 1:5 million DEM.Finally,a series of maps such as orginal differential interferogram,enhanced differential interferogram,coherence images and subsidence image are obtained,at the same time,the subsidence,the distribution and the subsidence area of Dongtan mine area are counted and analyzed during the imaging period,then the reliability and accuracy of D-InSAR monitored results are compared and verified with leveling-measured subsidence at nearest time interval.All of research results show that two-pass D-In-SAR can be effectively used to monitor the mining-induced subsidence.