山区煤矿三维地震勘探叠前新抽道集方法

New Fetch Trace Method Before Stacking of Three－dimensional Seismic Prospecting in Coal Mine of Mountain Area

目前，山区地震资料处理，仍采用常规的抽道集后进行水平叠加，但是山区激发点与接收点高差大，且煤层埋深相对较浅，按常规的抽道集方法不能实现共反射点叠加，从而影响了解释小陷落柱、小断层的精度。本文提出一种新的抽道集方法，同时解决了因地形高差和目的层起伏引起反射点在X、Y方向偏离中心点的归位问题，无论是二维还是三维勘探均可实现共反射点叠加，从而所得资料可准确的反映地下构造，该技术在目的层埋藏浅的山区开展地震勘探有重要的指导作用和应用价值。

At present, seismic informational processing of mountain area still used horizontal stacking after conventional fetch trace. But there are great difference of the height between induced points and receiving points in mountain areas, and coal depth relatively shallower, can not be realized common reflected points stack with conventional fetch trace method, thus influence on the interpretable precision of small collapse column and small fault. The new fetch trace method of the paper may be resolved above－mentioned problems, no matter two－dimensional or three－dimensional seismic prospecting, are all realized common reflected points stack, thus obtained informations can be reflected underground structures accurately, there are important guiding roles and applied values in the similar seismic prospecting.