Tunnel-and-surface integrated seismic detection method based on passive and active sources

Zhang, Yongheng; Hao, Lei; Chen, Lei; Xu, Xinji; Zhang, Fengkai

doi:10.1016/j.jappgeo.2024.105302

Journal of Applied Geophysics

2024

DOI: 10.1016/j.jappgeo.2024.105302

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Tunnel-and-surface integrated seismic detection method based on passive and active sources

Yongheng Zhang,

Lei Hao,

Lei Chen

et al.

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TBM Advanced Geological Prediction via Ellipsoidal Positioning Velocity Analysis

Gao,

Rong,

Wang

et al. 2024

Buildings

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Traditional seismic wave-based tunnel advanced geological forecasting techniques are primarily designed for drill and blast method construction tunnels. However, given the fast excavation speed and limited prediction space in tunnel boring machine (TBM) construction tunnels, traditional methods have significant technical limitations. This study analyzes the characteristics of different types of TBM construction tunnels and, considering the practical construction conditions, identifies an effective observation system and data acquisition method. To address the challenges in advanced forecasting for TBM construction tunnels, a method of ellipsoid positioning velocity analysis, which takes into account the constraints of three-component data directions, is proposed. Based on the characteristics of the advanced forecasting observation system, this method compares the maximum values on the spatial isochronous ellipsoidal surface to determine the average velocity of the geological layer rays, thereby enabling accurate inversion of the spatial distribution ahead. Utilizing numerical simulation, a model for the advanced detection of typical unfavorable geological formations is established by obtaining the wave field response characteristics of seismic waves in three-dimensional space, and the velocity structure of the model is retrieved through this velocity analysis method. In the engineering example, the fracture property, water content, and weathering degree of the surrounding rock are predicted accurately.

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TBM Advanced Geological Prediction via Ellipsoidal Positioning Velocity Analysis

Gao,

Rong,

Wang

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

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Tunnel-and-surface integrated seismic detection method based on passive and active sources

Cited by 1 publication

References 52 publications

TBM Advanced Geological Prediction via Ellipsoidal Positioning Velocity Analysis

TBM Advanced Geological Prediction via Ellipsoidal Positioning Velocity Analysis

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