综合矿区开采沉陷特点和D－InSAR基本原理指出，当前D－InSAR矿区沉陷监测的难点为：1）不易采用同一传感器数据监测整个地表移动周期内的矿区沉陷；2）在低潜水位矿区，地表移动活跃期内最大变形梯度往往超过雷达临界探测梯度导致去相干；3）在高潜水位矿区，变形梯度大、沉陷积水区雷达回波信号弱，导致干涉测量结果不理想。因此，为了改善D－InSAR在矿区的沉陷监测中的应用效果，针对上述问题提出了相应的解决方案。最后，通过选择淮南矿区形变期内的两景数据，进行二轨差分干涉处理，获得了研究区域煤炭开采形成的地表沉降场，并分析了不可靠形变信息产生的原因。%Comprehensive characteristics of mining subsidence and the principle of D -InSAR, pointed out that the difficulty of D -InSAR subsidence monitoring in the mining area are for:1 ) it is hard to use the same sensor data for monitoring mining subsidence during the whole surface movement period;2) in the lower groundwater level , during the surface movement active period ,maximum deformation gradient often exceed radar critical detection gradient , that leads to loss of coherence;3) Mining area in high groundwater level, in addition to the deformation gradient is big problem , the situation in the subsidence water area without radar echo signal will induce the inefficiency of interferometry .In order to improve the application effect of D -InSAR in the mining area , aiming to the a-bove problem , put forward that corresponding solution .Finally by selecting two scene data covered the deformation period of in the Huainan mining area , carrying out two-track difference interference method , obtained surface subsidence field of the research area by coal mining , at the same time, analyzing the causes of the unreliable deformation information .
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