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为了为矿区安全开采和塌陷区环境综合治理提供科学依据,利用精细的D-InSAR技术对7景ENVISAT ASAR影像进行处理,获得了2004～2005年和2008～2009年葛亭煤矿多期地面沉降分布图。然后将D-InSAR结果导入GIS中做后处理,叠加0.25m分辨率的数字正射影像图(DOM)和开采平面图等来分析地面沉降,并以剖面图、3D可视图等进行显示。通过多期结果的相互验证,并与水准资料进行了比较。结果表明,D-InSAR结果可以清楚可靠地给出矿区沉降区域分布和演化,并且获得的矿区沉降范围和位置与实际基本吻合,沉降幅度较小的区域在数量级上和水准资料一致,而最大沉降量出现偏差,这是由于高形变梯度引起了干涉图的完全失相关,超出了D-InSAR技术形变探测的能力范围。
In order to provide a scientific basis for mine safe mining and comprehensive management of subsidence area environment, seven sub-ENVISAT ASAR images were processed using the fine D-InSAR technology, and the multi-period land subsidence distribution of Genting Coal Mine was obtained from 2004 to 2005 and from 2008 to 2009 Figure The D-InSAR results were then imported into the GIS for post-processing, superimposed with a digital orthophoto map (DOM) of 0.25 m resolution and a mining plan to analyze the land subsidence and display it in cross-section, 3D view and so on. Mutual validation of multi-period results and comparison with leveling data. The results show that the D-InSAR result can clearly and reliably give the distribution and evolution of the subsidence area of the mining area, and the obtained subsidence range and location of the subsidence area are in good agreement with the actual situation. The area with smaller subsidence amplitude is in the same order of magnitude as the leveling data, This is due to the complete de-correlation of the interferograms due to the high deformation gradient, which is beyond the capabilities of the D-InSAR technique for deformation detection.