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在留尼旺岛格朗湖坝地区(Grand Etang dam site)进行的十二次地震层析成象勘测结果,是关于CPGF(法国地球物理勘探公司)在过去十年中所发展的弯曲射线层析成象技术的一个说明.在低速带之上覆盖着高速带的地区,这种方法取代了惯用的地震折射法,比简单直线的层析成象精确得多.在详细的研究中,没有损失深度方面的精度,并可将钻井结果向横向推广. 在格朗湖坝的情况下,固定于玄武岩的杭渗透截流设计,已被修正为考虑三处截流. 目前,进一步的工作是利用傅里叶变换发展衰减层析成象技术.在这种情况下,弯曲射线方法衬于计算正确的几何扩展是非常宝贵的.
Twelve seismic tomographic imaging surveys conducted at the Grand Etang dam site in Reunion Island are about the results of the flexographic radiography developed by the CPGF (French Geophysical Company) over the past decade An explanation of imaging techniques, which replaces the conventional seismic refraction method, is much more accurate than simple straight-line tomography, in areas covered by high-velocity zones at low velocities, with no loss in detailed studies Depth accuracy, and lateral drilling results can be extended.While in the case of the Grand Lake Dam, the Hangzhou seepage closure design, which is anchored to basalts, has been revised to consider three interceptions.At present, further work is to use Fourier Leaf Transform Development of Attenuated Tomography In this case, the bend ray method is very valuable for calculating the correct geometric expansion.