Scholarlink

<p>The mechanical properties and stability of tunnel surrounding rock are crucial to the safety of tunnel engineering. Seismic wave velocity is an important parameter that reflects the physical and mechanical properties of rock mass, stress state, and potential risks. Traditional velocity testing methods have limitations such as high cost, low efficiency, insufficient resolution, and difficulty in dynamic monitoring. This study adopts the microseismic time-lapse double-difference tomography technique and proposes a method for detecting the 3D velocity structure of tunnel surrounding rock based on microseismic monitoring. By comparing the installation methods of sensor anchor rod ends and boreholes, it was found that the anchor rod end installation method received signals with higher signal-to-noise ratios and better stability, making it more suitable for microseismic signal analysis. The study also explored the impact of different grid divisions on imaging results, with a 10&#xa0;m × 10&#xa0;m grid capturing more details. Combined with an engineering case, the spatial heterogeneity of the wave velocity distribution in tunnel surrounding rock was revealed, showing that the wave velocity in the face area was significantly lower than in the front and rear areas, forming a low-velocity zone, which reflects the disturbance of excavation and stress redistribution on the surrounding rock. The results show that the microseismic time-lapse double-difference tomography technique can efficiently and accurately obtain the velocity structure of tunnel surrounding rock, providing new technical support for stability analysis, support design, and safety monitoring of surrounding rock, and promoting the application of this technique in practical engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The Study on the Application of Time-Lapse Double-Difference Tomography Theory in the 3D Velocity Structure Distribution of Tunnel Surrounding Rock

  • 期刊论文

  • 发表日期：

    2026年4月6日

查看全文
  • Hongyun Yang,
  • Zhiming Zhang,
  • Xiang Wang,
  • Yifei Wu,
  • Zhi Lin,
  • Yong Li,
  • Xiang Chen,
  • Wanlin Feng,
  • Chuandong Jiang

摘要

The mechanical properties and stability of tunnel surrounding rock are crucial to the safety of tunnel engineering. Seismic wave velocity is an important parameter that reflects the physical and mechanical properties of rock mass, stress state, and potential risks. Traditional velocity testing methods have limitations such as high cost, low efficiency, insufficient resolution, and difficulty in dynamic monitoring. This study adopts the microseismic time-lapse double-difference tomography technique and proposes a method for detecting the 3D velocity structure of tunnel surrounding rock based on microseismic monitoring. By comparing the installation methods of sensor anchor rod ends and boreholes, it was found that the anchor rod end installation method received signals with higher signal-to-noise ratios and better stability, making it more suitable for microseismic signal analysis. The study also explored the impact of different grid divisions on imaging results, with a 10 m × 10 m grid capturing more details. Combined with an engineering case, the spatial heterogeneity of the wave velocity distribution in tunnel surrounding rock was revealed, showing that the wave velocity in the face area was significantly lower than in the front and rear areas, forming a low-velocity zone, which reflects the disturbance of excavation and stress redistribution on the surrounding rock. The results show that the microseismic time-lapse double-difference tomography technique can efficiently and accurately obtain the velocity structure of tunnel surrounding rock, providing new technical support for stability analysis, support design, and safety monitoring of surrounding rock, and promoting the application of this technique in practical engineering.