Research on the Damage Fracture of Rock Blasting Based on Velocity Response Spectrum

Abstract:

The damage caused by blasting vibration on rock mass is an extremely complex process, and has certain impact on the mechanical properties and bearing capacity of the rock, which will affect the overall stability and safe operation of the construction. Therefore, studying on the damage effect of blasting vibration is very necessary. Taking Laxiwa hydropower station project as a background, the paper computed relative velocity response spectrum using monitoring and measuring blasting velocity as an excitation, then analysis was carried out to study the relationship between the depth of rock blasting and the integral value of relative velocity response spectrum as well as the index of cooperation of the integral value and the blast vibration’s duration time. The results show that using three-parameter (velocity, frequency, duration time) was clearly superior to two-parameter (velocity, frequency) on studying the damage fracture of rock blasting, and two-parameter was better than one-parameter (velocity) by analogy.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 1521-1527
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.1521
• Online since: September 2011
• Authors: Xin Jian Sun, Jian Sheng Sun
• Keywords: Blasting Vibration, Excitation, Relative Velocity Response Spectrum, Rock Damage

References

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