1887
Volume 18, Issue 6
  • ISSN: 1569-4445
  • E-ISSN: 1873-0604

Abstract

ABSTRACT

Migration is considered to be a key step in the data processing of the seismic advancement predictions of tunnels, and it directly affects the final interpretations. Therefore, with the goal of addressing the limitations of the current acoustic reverse‐time migration processes, as well as deepening the understanding of the interactions between different wave modes in traditional elastic reverse‐time migration, a vector P‐ and S‐wave reverse‐time migration method is proposed in this study. Consideration is given to the actual tunnel spaces, and forward calculations and reverse‐time extrapolations of the wavefields are carried out based on the first‐order velocity‐stress elastic wave equation of P‐ and S‐wave separation and a high‐order staggered‐grid algorithm. The imaging conditions of a source‐normalized cross‐correlation are used to realize the imaging. Then, a Laplace filtering method is adopted to suppress the low‐frequency artefacts. Numerical simulations of the weak interlayer and karst cave models show that the proposed method had the ability to more effectively suppress noise and achieve high‐precision imaging of tunnel spaces, when compared with using horizontal or vertical components to directly obtain the images. The positions and shapes within the tunnel spaces can be accurately imaged regardless of whether they are lithologic interfaces or local geological bodies. This is found to improve the resolution and accuracy of the tunnel advancement predictions. Finally, the proposed method is successfully applied to the real data processing, and the effects are found to be satisfactory.

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/content/journals/10.1002/nsg.12121
2020-11-16
2024-03-29
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References

  1. Ashida, Y., Matsuoka, T. and Watanabe, T. (1998) Imaging algorithm for looking for ahead prediction of near subsurface data. Proceedings of the 4th SEG International Symposium. Expanded Abstracts, 129–134.
  2. Chang, W. and McMechan, G. (1994) 3‐D elastic pre‐stack reverse‐time depth migration. Geophysics, 59, 597–8722.
    [Google Scholar]
  3. Chang, X., Liu, Y.K. and Gui, Z.X. (2006) Zero‐offset reverse time migration for prediction ahead of tunnel face. Chinese Journal of Geophysics, 49, 1482–1488. (in Chinese)
    [Google Scholar]
  4. Chen, K. and Wu, G.C. (2012) An improved Laplace operator filtering algorithms for reverse time migration. Oil Geophysical Prospecting, 47, 249–256. (in Chinese)
    [Google Scholar]
  5. Cheng, F., Liu, J.P., Qu, N.N., Mao, M. and Zhou, L.M. (2014) Two‐dimensional pre‐stack reverse time imaging based on tunnel space. Journal of Applied Geophysics, 104, 106–113.
    [Google Scholar]
  6. Chew, W. and Liu, Q. (1996) Perfectly matched layers for elastodynamics: a new absorbing boundary condition. Journal of Computational Acoustics, 4, 341–359.
    [Google Scholar]
  7. Dong, L.G., Ma, Z.T. and Cao, J.Z. (2000) Stability of staggered grid high‐order difference method for first‐order elastic wave equation. Chinese Journal of Geophysics, 43, 856–864. (in Chinese)
    [Google Scholar]
  8. Graves, R. (1996) Simulating seismic wave propagation in 3D elastic media using staggered‐grid finite difference. Bulletin of the Seismological Society of America, 86, 1091–1106.
    [Google Scholar]
  9. Gu, B.L., Li, Z.Y., Ma, X.N. and Liang, G.H. (2015) Multi‐component elastic reverse time migration based on the P‐ and S‐wave separated velocity‐stress equations. Journal of Applied Geophysics, 112, 62–78.
    [Google Scholar]
  10. Guo, J.M. and Luo, C.S. (2014) Application of tunnel seismic image approach to the advanced geological prediction for tunnel. Journal of Multimedia, 9, 879–886.
    [Google Scholar]
  11. Harmankaya, U., Kaslilar, A., Wapenaar, K. and Draganov, D. (2018) Locating scatterers while drilling using seismic noise due to tunnel boring machine. Journal of Applied Geophysics, 152, 86–99.
    [Google Scholar]
  12. Inazaki, T., Isahai, H., Kavamura, S., Kurahaishi, T. and Hayashi, H. (1999) Stepwise application of horizontal seismic profiling for tunnel prediction ahead of face. The Leading Edge, 18, 1429–1431.
    [Google Scholar]
  13. Li, S.C., Liu, B., Xu, X.J., Nie, L., Liu, Z., Song, J.et al. (2017) An overview of ahead geological prospecting in tunneling. Tunnelling and Underground Space Technology, 63, 69–94.
    [Google Scholar]
  14. Li, S.C., Ren, Y.X., Liu, L.B., Xu, X., Liu, B. and Zhang, Q. (2019) Reverse time migration of seismic forward‐prospecting data in tunnels based on beamforming methods. Rock Mechanics and Rock Engineering, 52, 3261–3278.
    [Google Scholar]
  15. Li, S.C., Zhou, Z.Q., Ye, Z.H. and Li, L.P. (2015) Comprehensive geophysical prediction and treatment measures of karst caves in deep buried tunnel. Journal of Applied Geophysics, 116, 247–257.
    [Google Scholar]
  16. Li, Z.Y., Ma, X.N., Fu, C. and Liang, G. (2016) Wavefield separation and polarity reversal correction in elastic reverse time migration. Journal of Applied Geophysics, 127, 56–67.
    [Google Scholar]
  17. Liu, J.P., Cheng, F., Fan, C.Y. and Cao, J. (2012a) Two‐dimensional numerical simulation and characteristic analysis of full‐wave field in tunnel space. Chinese Journal of Geotechnical Engineering, 34, 1705–171. (in Chinese)
    [Google Scholar]
  18. Liu, J.P., Zeng, X.Z., Xia, J.H. and Mao, M. (2012b) The separation of P‐ and S‐wave components from three‐component crosswell seismic data. Journal of Applied Geophysics, 82, 163–170.
    [Google Scholar]
  19. Lu, G.Y., Xiong, Y. and Zhu, Z.Q. (2011) Finite difference forward modeling and migration processing for tunnel reflected wave advance detection. Journal of Central South University (Science and Technology), 42, 136–141. (in Chinese)
    [Google Scholar]
  20. Lüth, S., Giese, R., Otto, P., Krüger, K., Mielitz, S., Bohlen, T. and Dickmann, T. (2008) Seismic investigations of the Piora Basin using S‐wave conversions at the tunnel face of the Piora adit (Gotthard Base Tunnel). International Journal of Rock Mechanics and Mining Sciences, 45, 86–93.
    [Google Scholar]
  21. Mittet, R. (2002) Free‐surface boundary conditions for elastic staggered‐grid modeling schemes. Geophysics, 67, 1616–1623.
    [Google Scholar]
  22. Neil, D., Haramy, K., Hanson, D. and Descour, J. (1999) Tomography to evaluate site conditions during tunneling. 3rd National Conference of the Geo‐Institute. American Society of Civil Engineers, Geotechnical Special Publication, 89, 13–17.
  23. Petronio, L., Poletto, F. and Schleifer, A. (2007) Interface prediction ahead of the excavation front by the tunnel‐seismic‐while‐drilling (TSWD) method. Geophysics72, G39–G44.
    [Google Scholar]
  24. Shang, J.L., Luo, X.W., Guo, F., Hu, J. and Zhou, K. (2012) Advanced predication of geological anomalous body ahead of Laneway using seismic tomography technique. Procedia Engineering, 43, 324–330.
    [Google Scholar]
  25. Song, J. (2015) The three‐dimensional seismic advance prospecting method and its application for adverse geology in tunnel construction. PhD thesis, ShanDong University.
  26. Tzavaras, J., Buske, S., Groß, K. and Shapiro, S. (2012) Three‐dimensional seismic imaging of tunnels. International Journal of Rock Mechanics and Mining Sciences, 49, 12–20.
    [Google Scholar]
  27. Yan, J. and Sava, P. (2008) Isotropic angle‐domain elastic reverse‐time migration. Geophysics, 73, S229–S239.
    [Google Scholar]
  28. Zha, X.J., Gao, X., Wang, W., Hou, X.H., Yang, F. and Zhang, X.Y. (2018) Advanced prediction migration method research in tunnel engineering investigation. Chinese Journal of Geophysics, 61, 1151–1156. (in Chinese).
    [Google Scholar]
  29. Zhang, W. and Shi, Y. (2019) Imaging conditions for elastic reverse time migration. Geophysics, 84, S95–S111.
    [Google Scholar]
  30. Zhao, Y.G., Jiang, H. and Zhao, X.P. (2006) Tunnel seismic tomography method for geological prediction and its application. Applied Geophysics, 3, 69–74.
    [Google Scholar]
  31. Zhou, H.W., Hao, H., Zou, Z.H., Wo, Y. and Youn, O. (2018) Reverse time migration: a prospect of seismic imaging methodology. Earth‐Science Reviews, 179, 207–227.
    [Google Scholar]
  32. Zhou, J.J., Wang, D.L., Wang, R. and Yang, H. (2019) Prestack elastic RTM for VTI media using vector wavefield decomposition and vector imaging conditions. Exploration Geophysics, 50, 297–309.
    [Google Scholar]
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