TGS360pro超前预报地下水的地震波场正演模拟分析——以岩溶模型为例

Forward modeling analysis of seismic wave field for TGS360pro advanced prediction of groundwater: taking the karst model as an example

为了避免隧道开挖过程中由对掌子面前方地下水赋存状态探测不准而发生涌水事故,通过隧道地质超前预报TGS360系统,利用地震波信号的瞬时幅度和瞬时频率与岩体结构面的关系,准确、高效地对掌子面前方的赋水体进行探测,同时基于TGS360pro隧道超前预报系统原理,采用谱元法对掌子面前方存在充水溶洞的地质模型进行数值正演模拟,在波场分析的基础上,对正演所得地震波场记录数据进行Hilbert变换,得到了应力变化曲线。数值分析结果表明:TGS360pro隧道超前预报系统可以有效地探测掌子面前方富水状况,在隧道开挖建设中具有推广应用前景。

In order to avoid the occurrence of water gushing accident due to the inaccurate detection of the underground water storage state in front of the tunnel during the excavation of the tunnel, the tunnel geology survey TGS360 pro System was used to accurately and efficiently detect the water-bearing body in front of the tunnel face by using the relation between the instantaneous amplitude and frequency of seismic wave signal and the rock structure plane, at the same time, based on the principle of TGS360 pro tunnel Prediction System, the geological model with water-filled cave in front of the face was simulated by using spectral element method, through the stress curve, the numerical analysis results showed that the TGS360 pro Tunnel Prediction System could effectively detect the water-rich condition in front of the tunnel, it had the prospect of popularization and application in tunnel excavation construction.