在干燥的西北,常用折射波法进行复盖层下的地质填图,借以圈定煤系的分布范围,并查明复盖层的厚度。工作中,几乎全用土坑爆炸。这时,在地震记录上经常出现一种强烈的干扰脉冲,有时使整个记录出现一条接着一条的“空白条带”,严重地影响了生产。 In the dry northwest, the refractivity wave method is commonly used to conduct geological mapping under the overburden to delineate the distribution range of the coal system and to ascertain the thickness of the overburden. In the work, almost all the earth pit explosion. At this moment, a strong disturbance pulse often appears on the seismogram, sometimes making the whole record appear one by one “blank band”, which seriously affects the production.