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在复杂地区存在大量的复杂干扰,特别是次生波干扰非常发育。要压制这些干扰,需要加大组合排列长度,势必导致组合高差增加而损害有效波。通过模型正演、波形和频谱分析方法得出:在复杂地区勘探中对检波器组内高差小于1/4视波长的规定过于保守,束缚了大组合压制干扰技术在复杂地区的应用;组内高差的极限受地形、所保护的地震波波长、信噪比等因素影响,是变化的参数;放宽组内高差的限制,尽管有效波被损伤的程度会稍大一些,但如果干扰波被压制的程度更大,从提高信噪比的目标来衡量是值得的。
There are a lot of complex interferences in complex areas, especially the secondary wave interference is very development. To suppress these interferences, the need to increase the length of the combined arrangement will inevitably lead to increased portfolio height and damage the effective wave. Through forward modeling, waveform analysis and spectrum analysis, it is concluded that in the exploration of complex areas, the regulations on the wave length within the detector group that the height difference is less than 1/4 are too conservative, which limits the application of the large combined jamming technique in complicated areas. The limit of height difference is affected by topography, the wavelength of the seismic wave to be protected, the signal-to-noise ratio and other factors, which are the parameters of the variation. To relax restrictions on the height difference of the group, although the effective wave is slightly damaged, To a lesser extent, it is worth the measure of improving the signal-to-noise ratio.