基于SBAS-InSAR和偏移追踪技术的露天煤矿地面形变监测
Ground deformation monitoring of open-pit coal mine based on SBAS-InSAR and offset tracking techniques
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摘要: 利用基于StaMPS的SBAS-InSAR技术，以安太堡露天煤矿为研究区域，对覆盖露天煤矿的33景哨兵升降轨数据进行时序干涉处理，提取了露天煤矿区7个月的地面形变信息，根据SAR卫星成像几何对斜距向形变信息进行分解，获取了数据采集时间段内露天煤矿的二维方向的累积形变量，计算的露天煤矿形变速率为-258 mm/a，在排土场发现较大的沉降中心，累积沉降量为134 mm；采用偏移追踪技术计算了露天煤矿失相干区域的大梯度形变，2种技术相结合可以较好地对露天煤矿不同梯度的形变进行监测。Abstract: Using SBAS-InSAR based on StaMPS and taking Antaibao Open-pit Coal Mine as research area, this paper carries out time series interferometry processing on 33 sentinel ascending and descending images, extracts ground deformation information of open pit coal mine for 7 months. According to SAR satellite imaging geometry, slant-range deformation information is decomposed, and cumulative deformation of open-pit coal mine in two-dimensional direction during data collection period is obtained. Deformation rate of open-pit coal mine is -258 mm/a. A large subsidence center is found in dump, and cumulative subsidence is 134 mm; large gradient deformation in decorrelation area is calculated by offset tracking technique. The combination of two techniques can better monitor deformation of open-pit coal mine at different gradients.
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