PREDICTION AHEAD OF THE TUNNEL FACE BY THE SEISMIC REFLECTION METHODS
ZENG ZHAO-HUANG (The First Surveying and Designing Institute of the Ministry of Railways, Lanzhou 730000)
In the article, negative apparent velocity event which tunnel vertical seismic profiling has got is used to resolve the sign of the reflected wave from the front of the tunnel face. Then this sign is used to invert space position and strike and dip of reflecter in order to get predictino.
【CateGory Index】： U452.11