Calculation of P wave quality factor of rock mass based on measured blasting vibrations

YANG Zhaowei; LU Wenbo; CHEN Ming; YAN Peng; HU Yingguo; LIU Meishan; WU Xinxia; LENG Zhendong

doi:10.11883/bzycj-2019-0333

Volume 40 Issue 6

Jun. 2020

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YANG Zhaowei, LU Wenbo, CHEN Ming, YAN Peng, HU Yingguo, LIU Meishan, WU Xinxia, LENG Zhendong. Calculation of P wave quality factor of rock mass based on measured blasting vibrations[J]. Explosion And Shock Waves, 2020, 40(6): 065202. doi: 10.11883/bzycj-2019-0333

Citation:

YANG Zhaowei, LU Wenbo, CHEN Ming, YAN Peng, HU Yingguo, LIU Meishan, WU Xinxia, LENG Zhendong. Calculation of P wave quality factor of rock mass based on measured blasting vibrations[J]. Explosion And Shock Waves, 2020, 40(6): 065202. doi: 10.11883/bzycj-2019-0333

Citation:

YANG Zhaowei, LU Wenbo, CHEN Ming, YAN Peng, HU Yingguo, LIU Meishan, WU Xinxia, LENG Zhendong. Calculation of P wave quality factor of rock mass based on measured blasting vibrations[J]. Explosion And Shock Waves, 2020, 40(6): 065202. doi: 10.11883/bzycj-2019-0333

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Calculation of P wave quality factor of rock mass based on measured blasting vibrations

doi: 10.11883/bzycj-2019-0333

1.
Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, China
2.
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China
3.
China Gezhouba Grope Explosive Co. Ltd., Chongqing 401121, China

Received Date: 2019-08-27
Rev Recd Date: 2019-11-17
Publish Date: 2020-06-01

Abstract

Abstract

Studies on the attenuating characteristic of blasting seismic waves in propagating process are important in prediction and control of blasting vibration effects by engineering blasting. Field blasting tests of single-hole were conducted to study the quality factor of rock mass. The wave propagation velocities and the pulse rise times can be obtained by using the first arrival of P wave and S wave. Finally, based on the rise time method, the P wave quality factor of rock mass can be calculated. By analyzing the measured blasting vibration signals in Fengning hydropower station and Zhoushan large petrochemical industry, the average P wave quality factors in the above two regions are found to be 19.02 and 14.07, respectively. The experimental results show that the values derived by measuring blasting vibrations are far less than the values predicted by the empirical formulas and measured by the original rock mass. This results indicate that the soft covering layer has great influence on the seismic waves propagation induced by blasting.
- blast field tests,
- blasting vibration,
- propagation velocity,
- pulse rise time,
- quality factor

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References(24)

References

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