黄土塬区多道瞬态面波数据采集试验分析

Test analysis of multi-channel transient surface wave data acquisition in loess plateau

为了将多道瞬态面波探测方法更好地应用于地质调查工作中,文中开展了黄土塬区多道瞬态面波的数据采集参数论证研究。通过采用不同的震源激发,对数据采集的接收道数,道间距,最小偏移距等参数进行对比,分析了不同采集参数对数据质量的影响,进一步给出了确定黄土塬区的多道瞬态面波数据采集方法和参数的一般原则。实际资料的处理成果较为精确地反映了工区近地表的速度结构和黄土类型特征,表明了本文数据采集参数选择方法的合理性,为该方法在黄土塬区地质调查中的应用奠定了基础。

In order to apply the method of multi-channel analysis surface wave(MASW)to geological survey,the authors studied multi-channel transient surface wave data acquisition in loess plateau.The effect of some acquisition parameters,such as different excitation sources,number of receiving channels,station intervals and the minimum offset,on the record quality of the data was analyzed.In addition,the suitable data acquisition method and parameters for the loess plateau were pointed out.The processing results of the actual data reflect the velocity structure and the loess type characteristics in the near surface of the work area,which indicates that the selection method of the data acquisition parameters is reasonable,which lays a foundation for the application of MASW in the geological survey in the loess plateau area.