1. School of Geology Engineering and Geomatics,Chang'an University,Xi'an 710054,China 2. Key Laboratory of Western China's Mineral Resources and Geological Engineering,Ministry of Education,Xi'an 710054,China 3. Sichuan Metallurgical Geological Exploration Institute,Chengdu 050031,China 4. Shaanxi Coal Geophysical Prospecting and Surveying Co.,Ltd,Xi'an 710005,China 5. China Petroleum Logging Co.,Ltd,Xi'an 710077,China
In order to analyze the effect of suppressing background noise of the vibroseis vehicle,the authors,based on the working principle and cross-correlation theory of the vibroseis,simulated calculation of the reflected signal generated by the geological model by adding random Gaussian white noise and actual road traffic interference noise.The results show that the vibroseis can suppress random noise equivalent to 27~81 times the reflected signal strength or 5~27 times of actual road traffic interference noise from single excitation to 8 repeated excitations.The engineering seismic exploration example shows that,in the context of strong urban traffic interference,the vibroseis can be used as the excitation source,and both the exploration accuracy and the exploration depth can meet the engineering needs.
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