| Citation: | Peng Guan, Zhenqiang Shen, Cuifa Shao, Yuyong Jiao, Guohua Zhang, Bin Li, Jie Zhou. A Novel Tunnel Seismic Prediction Method Based on Threshold Trigger. Journal of Earth Science, 2026, 37(4): 1841-1851. doi: 10.1007/s12583-024-1982-z
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The tunnel seismic prediction method can provide information on the geological anomalous body in front of the tunnel face in a long distance (120 m), which has become a necessary work in tunnel construction. The traditional tunnel seismic prediction methods suffer from two main issues: low data acquisition efficiency and the occurrence of signal delay traces during data gathering. These issues, in turn, impact the accuracy of calculating the velocity of the surrounding rock. To address these shortcomings, this paper proposes a new method called the threshold-triggered tunnel seismic prediction method. The effectiveness of the proposed method is validated through the analysis of measured tunnel seismic data. Firstly, when compared with the traditional short-circuit trigger method, the threshold trigger method demonstrates a significant improvement in data acquisition efficiency. Secondly, the threshold triggering mode effectively eliminates the problem of signal delay and jump that is present in the short-circuit trigger mode, thus ensuring the accuracy of the surrounding rock velocity calculation. These advantages clearly demonstrate the potential engineering application value of the threshold-triggered method.
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