oa Preview Number 86

References

1. Bruck, E, Chwatal, W., Dolzlmuller, J, and Jobstl, W, 1997. An Analyzing of VSP to the Exploration ahead of a Tunnel Proc. International Workshop on The Application Of Geophysics to Rock Engineering, Columbia Uni. NY, June 29, 1997, 90-97.
2. Neil. D .. Haramy, K., Deseour, J., and Hanson. D., 1999, Imaging Ground Conditions Ahead of the Face World Tunnelling Nov. 1999, 425-419
3. Sattle. G., P. and Amberg, R. l992, Prediction ahead of the tunnel face by seismic, methods a pilot project In Centovalli tunnel, Locama, Switzerland, First Break, 10, 19-25