基于TCP-InSAR的采动区铁路动态沉降监测与时序分析
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摘要
为高效获取采动区长时间序列形变,监控煤炭开采对矿区铁路的影响,研究一种基于TCP-InSAR(temporarily coherent point interferometric synthetic aperture radar)的采动区铁路形变监测方法。该方法根据时间序列SAR影像间的相干性,选取临时相干点构建Delaunay三角网,并通过离群值探测去除具有相位模糊度的TCP间的弧段,最后采用最小二乘解算得到区域地表变形。实验使用2016-10～2017-04时间段内的15景Sentinel-1A数据,利用TCP-InSAR技术获得某矿区的铁路形变。结果表明,受采动影响,该时间段内铁路最大下沉值为95mm,最大倾斜坡度为0.37‰。利用TCP-InSAR技术可实现采动区内铁路长时间的动态形变监测。
In order to effectively acquire the long time series deformation of mining area and monitor the influence of coal mining on railway,a railway deformation monitoring method based on TCP-InSAR(temporarily coherent point interferometric synthetic aperture radar)is studied.According to the coherence between SAR images in time series,this method selects temporary coherent points to construct Delaunay triangulation network,removes arcs with phase ambiguity between TCPs through outlier detection,and finally obtains the regional surface deformation by least squares solution.Based on 15 Sentinel-1A data from October 2016 to April 2017,using TCP-InSAR technology obtains the railway deformation in the mining area.The experimental results show that the maximum subsidence value of the railway is 95 mm and the maximum inclined slope is 0.37 per thousand during the mining period.The TCP-InSAR technology can be used to monitor the long time dynamic deformation of the railway in the mining area.
In order to effectively acquire the long time series deformation of mining area and monitor the influence of coal mining on railway,a railway deformation monitoring method based on TCP-InSAR(temporarily coherent point interferometric synthetic aperture radar)is studied.According to the coherence between SAR images in time series,this method selects temporary coherent points to construct Delaunay triangulation network,removes arcs with phase ambiguity between TCPs through outlier detection,and finally obtains the regional surface deformation by least squares solution.Based on 15 Sentinel-1A data from October 2016 to April 2017,using TCP-InSAR technology obtains the railway deformation in the mining area.The experimental results show that the maximum subsidence value of the railway is 95 mm and the maximum inclined slope is 0.37 per thousand during the mining period.The TCP-InSAR technology can be used to monitor the long time dynamic deformation of the railway in the mining area.
引文
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[3] Ferretti A,Prati C,Rocca F.Nonlinear Subsidence Rate Estimation Using Permanent Scatterers in Differential SAR Interferometry[J].IEEE Transactions on Geoscience and Remote Sensing,2004,42(11):2 446-2 453
[4] Hooper A.A Multi-Temporal InSAR Method Incorporating Both Persistent Scatterer and Small Baseline Approaches[J].Geophysical Research Letters,2008,35:L16 302-L16 307
[5] Berardino P,Fornaro G,Lanari R,et al.A New Algorithm for Surface Deformation Monitoring Based on Small Baseline Differential SAR Interferograms[J].IEEE Transactions on Geoscience and Remote Sensing,2002,40(11):2 375-2 383
[6] Zhang L,Ding X L,Lu Z.Modeling PS-InSAR Time Series without Phase Unwrapping[J].IEEE Transactions on Geoscience and Remote Sensing,2011,49(1):547-557
[7]陈华.基于TCP-InSAR技术的矿区地表沉降监测[D].徐州:中国矿业大学,2016(Chen Hua.Surface Subsidence Monitoring in Mining Area Based on TCP-InSAR Technology[D].Xuzhou:China University of Mining and Technology,2016)
[8] Fan H D,Xu Q,Hu Z B,et al.Using Temporarily Coherent Point Interferometric Synthetic Aperture Radar for Land Subsidence Monitoring in a Mining Region of Western China[J].Journal of Applied Remote Sensing,2017,11(2):026003
[9] Liu B K,Yu W D.Comparative Study on Scan SAR and TOPSAR[J].Journal of the Graduate School of the Chinese Academy of Sciences,2011,28(3):360-365
[10]邹昊,邓喀中.基于PS-InSAR技术的老采空区地表沉降监测研究[J].煤炭技术,2017,36(5):175-177(Zou Hao,Deng Kazhong.Research on Surface Subsidence Monitoring of Old Goaf Based on PS-InSAR Technology[J].Coal Technology,2017,36(5):175-177)
[11]邓喀中,谭志祥,姜岩,等.变形监测及沉陷工程学[M].徐州:中国矿业大学出版社,2014(Deng Kazhong,Tan Zhixiang,Jiang Yan,et al.Deformation Monitoring and Subsidence Engineering[M].Xuzhou:China University of Mining and Technology Press,2014)
[12]中国中铁二院工程集团有限责任公司.新建铁路工程测量规范[S].2008(China Railway Eryuan Engineering Group Co Ltd.Standard for Measurement of New Railway Engineering[S].2008)
[13]郑美楠,刘沂轩,邓喀中,等.基于D-InSAR与概率积分法的铁路变形监测与预测[J].测绘通报,2017(1):106-111(Zheng Meinan,Liu Yixuan,Deng Kazhong,et al.Monitoring and Prediction of Railway Deformation Based on D-InSAR and Probability Integral Method[J].Bulletin of Surveying and Mapping,2017(1):106-111)
[14]中国铁路总公司.铁路技术管理规程[S].2014(China Railway Corporation.Technical Management Rules of Railway[S].2014)