在一般情况下，煤层反射波应满足于薄层反射的一般规律。
In general, the coal reflected waves were suited to universal law of that from thin bed.
薄层反射在频率域会出现陷频现象，其陷频周期的倒数等于薄层的时间厚度。
The reflection of thin layer may lead to frequency notch and the reciprocal of notch cycle is equal to the time thickness of thin layer.
作者通过研究地层厚度变化对地层本身的反射系数谱及反射波频谱的影响规律，寻找到了一种新的计算薄层厚度的方法。
By analyzing the reflectivity spectrum and reflection wave spectrum of thin beds, we put forward a new method for thickness determination of the thin beds.
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