Seismic wave advanced detection device and method for seismic vibrator of tunnel boring machine

By arranging electromagnetically controlled earthquake source components on both sides of the working platform of the tunnel boring machine, high-precision beam formation and counter-time offset imaging are achieved, the limitations of traditional seismic wave advance detection methods under extremely complex geological conditions are solved, the signal-to-noise ratio and imaging accuracy are improved, and it is suitable for tunnel boring machine construction environment under complex geological conditions.

WO2025055074A1 Publication Date: 2025-03-20SHANDONG UNIV
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Patent Information

Application Number
PCT/CN2023/127955
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-11
Filing Date
2023-10-30
Publication Date
2025-03-20

AI Technical Summary

Technical Problem

The traditional seismic wave advance detection method has limitations in its application under extremely complex geological conditions, including insufficient excitation energy, short signal propagation distance, difficult to distinguish signals in environments with severe noise, large safety hazards, and unsatisfactory detection results.

Method used

The electromagnetically controlled vibration source assembly is adopted. By arranging electromagnetically controlled vibration source assembly on both sides of the working platform of the boring machine, high-precision beam formation and counter-time offset imaging are achieved, and the signal-to-noise ratio and imaging accuracy of earthquake recording are improved.

Benefits of technology

It improves the recognition ability of long-distance weak reflected signals, enhances the safety and imaging accuracy of the detection process, and is suitable for tunnel boring machines construction environment under complex geological conditions.

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Abstract

A seismic wave advanced detection device for a seismic vibrator of a tunnel boring machine. The device comprises electromagnetic seismic vibrator assemblies (3) arranged on two sides of an operating platform (2) of the boring machine, wherein each electromagnetic seismic vibrator assembly (3) comprises a telescopic ejector rod (5), a counterweight housing (6), an air bag (7), a support (8), a first base (14) and a second base (9), and the telescopic ejector rod (5) is fixed to the side of the counterweight housing (6) that faces a rock wall (11); the counterweight housing (6) and the air bag (7) are both fixed to the first base (14), the air bag (7) is located on the side of the counterweight housing (6) that is away from the telescopic ejector rod (5), and the first base (14) is fixedly connected to the second base (9) by means of the support (8). Further provided is a seismic wave advanced detection method for a seismic vibrator of a tunnel boring machine. Beam formation and reverse-time migration imaging are realized, a signal-to-noise ratio of seismic records is increased by a beam focusing method, and the imaging precision is improved.
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