The Study of Crosshole Seismic Tomography in the Investigation of Geological Hazards
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摘要: 地质灾害体如岩溶、陷落柱、软弱层等的井间地震层析成像属于复杂模型或大扰动异常体的非线性成像。该文首次将小波多尺度思想引入到井间层析成像,建立了小波多尺度井间地震层析成像方法,很好地解决了非线性成像的难题,大大地提高了图像的质量和分辨率。数值模型试验和实际工程应用证实了该方法的实用性和良好效果。Abstract: The crosshole seismic tomography for geological hazardous bodies belongs to nonlinear tomography for complicated models or high contrast velocity models. In order to provide a wavelet transform-based multiscale inverse method of seismic tomography,this paper has for the first time introduced the wavelet multi-scale to the seismic tomography,thus effectively solving the difficulty of nonlinear tomography and enhancing the tomographic resolution.The practicability and good effect of the method have been proved by the numerical modeling and some real cases.
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