隧道管波对于地震反射波法超前地质预报影响分析

Analysis of influence of tunnel tube wave on geological forecast of seismic reflection wave method

隧道管波在地震反射波法超前地质预报数据采集中作为一种干扰波的存在是无法消除和克服的,对预报处理成果具有严重的影响,是影响预报距离长度的主要因素,在预报资料处理中要全部切除。文中详细论述了隧道管波的形成原因及特征,并进一步计算分析了不同的岩体地震波速条件下隧道管波对预报距离的影响过程。研究结果对于根据波速条件和预报测量参数合理评估预报距离有一定的参考价值。

The existence of tunnel tube wave as an interfering wave cannot be eliminated and overcome in the geological forecasting data acquisition by seismic reflection method. It has a serious impact on the prediction results and is a major factor influencing the length of prediction distance, therefore it should be removed completely in data processing. The cause and the characteristics of the tunnel tube wave are further discussed in the paper, and the influence of tunnel tube wave on the prediction distance under different rock mass seismic wave speeds is calculated and analysed. The study results could be referred to estimate the prediction distance according to the wave velocity and the forecast parameters.