D-InSAR技术在矿区沉降监测中的应用分析

摘要

This paper had collected 2 scenes of PALSAR sensor radar date of a mine which wsa ob-tained in December 15,2007 and March 22,2010,and the V2 DEM SRAM-3 was used as the exter-nal DEM data for the“two rail” method differential interference processing. This paper mainly intro-duces the main flow of the“two rail” method,and extracts the differential interference,enhanced in-terference,coherent and surface deformation. The settlement value of the mining area is obtained by the geographical encoding,and the feasibility of the application of D-InSAR in the mine subsidence monitoring is verified by comparing with the measured settlement value. The results show that the D-InSAR technology can accurately reflect the location and degree of surface subsidence,monitoring re-sults can reach a certain precision,especially in mining area subsidence monitoring is better than the traditional monitoring means;with the improvement of D-InSAR technology,its precision and accura-cy will be improved,the application will be more extensive.%研究利用分别于2007年12月15日和2010年3月22日获取的两景覆盖某矿区的PALSAR影像,以SRAM-3 V2的DEM作为外部DEM数据进行二轨差分处理。主要介绍了二轨法的主要流程,提取了差分干涉图、增强干涉图、相干图和地面形变图。通过地理编码得到地理坐标下矿区的沉降值,并在与水准实测沉降值对比后,验证了D-InSAR在矿区沉降监测应用的可行性。研究结果表明,D-InSAR技术能够准确反映出地表沉陷的位置和下沉程度,监测结果能达到一定精度,尤其在矿区这种以垂直沉降为主的区域沉降监测优于传统监测手段；随着D-InSAR技术的改进,其在地表沉降监测的精度和准确性会相应提高,应用也会越来越广泛。