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井间地震是通过井中激发,在另外一口井中接收地震波,利用地震波走时和能量衰减来反演目标体内部结构的一种地球物理方法。该文首先介绍了井间地震成像原理,重建算法;然后建立简单的地质模型进行物理模拟试验,采用同时迭代重建算法(SIRT)进行反演重建,检验该算法的效率和精度;通过某高速公路岩溶探测的应用,表明井间地震方法在解决实际工程问题上具有良好的应用效果。
Cross-well earthquakes are geophysical methods that are used to invert the internal structure of a target by using seismic wave traveltimes and energy decay, which are excited in the well and received in another well. In this paper, the principle and algorithm of cross-well seismic imaging are introduced firstly. Then, a simple geologic model is established for physical simulation test, and the SIRT is used for inversion and reconstruction to verify the efficiency and accuracy of the algorithm. The application of karst exploration shows that the crosswell seismic method has a good application effect in solving practical engineering problems.