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基于SBAS-InSAR的长治矿区地表形变监测

DOI: 10.6046/gtzyyg.2014.03.06, PP. 37-42

Keywords: 小基线集(SBAS),形变监测,矿区沉降,DInSAR,长治矿区

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Abstract:

小基线集InSAR(SBAS-InSAR)时序分析方法能够较好地克服InSAR时空失相干限制,抑制地形和大气影响,增加时间采样率,在监测地表形变随时间演化方面取得了较好的应用。为了有效监测山西省长治矿区地表形变,利用DInSAR方法监测开采矿区的快速大形变,得到形变区30d的最大沉降量为11cm;利用SBAS方法监测矿区边缘微小缓慢形变,得到2003年7月-2010年7月期间区内地面沉降的空间展布及时间序列相对形变量。对于矿区周围相干性保持较好的居民区,SBAS方法监测结果表明其整体形变表现为沉降趋势,沉降面积较大,沉降速率为5~15mm/a,最大累计沉降为90mm。矿区因开采时间、开采方式、采储量以及地形等因素的不同而呈现出不同的沉降结果。

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