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合成孔径雷达干涉测量(DInSAR)技术是监测动态地表沉陷的新方法,能够大范围地监测地表下沉盆地的动态演化过程,可以较好地反映各阶段的地表下沉形态。但是受到噪声等因素的影响,基于DInSAR数据计算的倾斜、水平变形等曲线规律性较差,与实际偏差较大,而倾斜、水平变形又是研究地表受护对象是否安全的重要指标。基于DInSAR监测数据,采用数值模拟方法,对澳大利亚West Cliff煤矿长壁工作面32开采动态地表移动变形进行分析研究。结果表明,数值模拟得到的下沉曲线与DInSAR实测数据比较吻合,相关系数可达95%以上,且数值模拟方法求算的地表倾斜、曲率和水平变形与理论形态一致。因此,进行矿区地表及其附属建(构)筑物受采动影响分析时,应以DInSAR实测数据为基础确定模型参数,结合数值模拟方法揭示地表动态其他移动变形值的分布规律。研究表明,该方法具有良好的适用性,可为类似的情况提供参考。
Synthetic Aperture Radar Interferometry (DInSAR) is a new method to monitor dynamic subsidence. It can monitor the dynamic evolution of surface subsidence basin in a wide range and reflect the subsidence morphology of each stage well. However, influenced by noise and other factors, the slope and horizontal deformation curves calculated based on DInSAR data have poor regularity and large deviation from actual values. However, inclination and horizontal deformation are important indexes for studying whether the ground surface is protected. Based on the DInSAR monitoring data, the numerical simulation method was used to analyze the dynamic ground surface deformation of longwall 32 mining face in West Cliff coal mine in Australia. The results show that the sinking curve obtained by numerical simulation is in good agreement with the DInSAR measured data, and the correlation coefficient can reach more than 95%. The slope, curvature and horizontal deformation calculated by the numerical simulation method are consistent with the theoretical ones. Therefore, when mining surface and its ancillary structures are affected by mining, the model parameters should be determined based on the measured data of DInSAR, and the distribution law of other moving deformation values of the ground surface dynamics should be revealed by numerical simulation. Research shows that this method has good applicability and can provide reference for similar situations.