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| STUDY ON SEARCH ANGLE FOR GEOLOGICAL PREDICTION IN XINLUONA TUNNEL BY TSP-202 SEISMIC SYSTEM |
| Li Zhong |
| (Shijiazhuang Railway Institute， Shijiazhuang 050043 China) |
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Abstract The search angle is an imporment factor to be considered to improve the prodiction distance and accuracy in the gedogical prodiction with TSP-202 seismic system. With the theory and method of probability，tectonic geology and material mechanics，the search angle obtained by TSP-202 seismic system is analysed. An adjustment method is proposed for the search angle to improve the prediction accuraey，and applied in Xinluona tunnel with good result.
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2002, Vol. 21 
