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目前，在煤田二维地震资料解释工作中，对深层反射界面进行空间校正时，通常采用先求得深层反射波的出射角，再得到反射波回声路径，最后实现空间校正。这类方法大都是建立在两层介质常速假设条件下，对于变速情况则有些不适应。本文将提出两层介质情况下，每层介质的波速分别为波在该层沿法线传播回声时间函数的空校方法。使用该方法可以较好地实现从等时平面图直接归位做构造图。
At present, in the field of interpretation of 2D seismic data in coalfields, the spatial reflection of the deep reflection interface is usually obtained by first obtaining the exit angle of the deep reflected wave and then obtaining the echo path of the reflected wave, and finally realizing the spatial correction. Most of these methods are based on two-layer media under the assumption of constant speed, some of the conditions for variable speed does not meet. In this paper, we propose a two-layer medium case where the wave velocity of each layer of media is the air-space method of propagating the echo as a function of time along the normal of the wave at this layer. Use this method can be better achieved from the isochronous plan directly to the home map.