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Prediction of tunneling hazardous geological zones using the active seismic approach
Author(s) -
Jiao YuYong,
Tian HuNan,
Liu YunZhen,
Mei RuWu,
Li HaiBo
Publication year - 2015
Publication title -
near surface geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.639
H-Index - 39
eISSN - 1873-0604
pISSN - 1569-4445
DOI - 10.3997/1873-0604.2015017
Subject(s) - geology , hazardous waste , geophone , hydrogeology , regional geology , engineering geology , economic geology , karst , mining engineering , environmental geology , seismology , geotechnical engineering , telmatology , volcanism , engineering , tectonics , paleontology , waste management
ABSTRACT This paper presents a seismic method and a newly developed device to predict the hazardous geological zones ahead of a tunnel face. The equipment used to predict hazardous geological zones consists of three components: the seismic source, the acquisition unit, and the data processing unit. The following features enable this device to be a valuable tool in predicting hazardous geological zones: the precise trigger time detection; the application of semi‐liquid couplant, which improves geophone coupling with the surrounding rock; the filtering of the prominent tunnel acoustic wave interference; and a software package of information on hazardous geological zones. Through extensive detection exercises of hazardous geological zones in the excavations of nearly 100 tunnel projects in China, it has been demonstrated that this device can satisfactorily predict hazardous geological zones, such as faults, water‐bearing zones, karst caverns, etc., within 150 m in front of the tunnel faces.