振动法与超声波法测试岩块纵波波速的实测比对研究

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Abstract P-wave velocity of rock block is an important parameter reflecting rock block’s physical properties, development of internal fissures and cracks, and completeness of rock mass.Accurate measurement of P-wave velocity of rock block is an urgent work in field of rock mechanics.The rock mass wave velocity testing methods mentioned in relevant code have seismic exploration technique, ultrasonic method and so on, while only the ultrasonic method is used in rock block wave velocity testing.Due to different frequencies of vibration wave and ultrasonic one, there is a certain difference between wave velocity values measured with the two methods.Therefore, when the vibration method is used to measure longitudinal wave velocity of rock block, the ultrasonic method is also used to do so, and the obtained rock mass integrity coefficient can’t accurately reflect the completeness of rock mass.Based on the above analysis, here, the vibration method was used to accurately measure longitudinal wave velocity of rock block.Vibration was excited at one end of a rock block, and vibration signals were collected using sensors arranged at both ends of the rock block to obtain its longitudinal wave velocity.The comparison between the measured value of rock block’s longitudinal wave velocity using the vibration method and that using the ultrasonic method showed that the maximum relative error between them is -7.87%.

Key words： vibration method longitudinal wave (P-wave) velocity ultrasonic testing

Received: 23 December 2019 Published: 15 May 2021

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	Articles by authors
	HOU Xingmin
	SUN Meng
	ZHANG Yilin

Cite this article:

HOU Xingmin,SUN Meng,ZHANG Yilin. Comparison between vibration method and ultrasonic method in measuring longitudinal wave velocity of rock block[J]. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(9): 264-269.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2021/V40/I9/264

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