Blasting vibration control and damage characteristics of bedding rock slopes

Wang Zhide; Xia Yuanyou; Zhou Xiong; Xia Guobang; Yang Jinhua

doi:10.11883/1001-1455(2017)01-0027-10

Volume 37 Issue 1

Jan. 2017

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Citation:

Wang Zhide, Xia Yuanyou, Zhou Xiong, Xia Guobang, Yang Jinhua. Blasting vibration control and damage characteristics of bedding rock slopes[J]. Explosion And Shock Waves, 2017, 37(1): 27-36. doi: 10.11883/1001-1455(2017)01-0027-10

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Blasting vibration control and damage characteristics of bedding rock slopes

doi: 10.11883/1001-1455(2017)01-0027-10

1.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, Hubei, China
2.
Yunnan Highway Development & Investment CO., LTD., Kunming 650101, Yunnan, China
3.
School of Architectural Engineering, Yunnan Jiaotong College, Kunming 650101, Yunnan, China

Received Date: 2015-10-08
Rev Recd Date: 2016-01-14
Publish Date: 2017-01-25

Abstract

Abstract

In order to understand the law of vibration propagation and the damage degree of the bedding rock slope during blasting excavation, we studied the bedding slope in Puli-Xuanwei Expressway in Yunnan Province as an example. By applying acoustic tests in combination with the monitoring vibration and sound velocities under different depths of the rock mass, we obtained the vibration velocities at different locations after blasting, and analyzed the damage range as well as the propagation and attenuation law of the vibration wave measured of different explosive doses. The results show that the vibration velocity at any point of the blasting area exhibits a corresponding relationship with the damage depth of the slope. It exhibits a linear relation for single explosion and a presents non-linear relation for repeated explosion. Assuming a decrease of 10% in the sound velocity as the damage limit and the control value of blasting, the critical velocity corresponding to single explosion is 11.54 cm/s, the damage radius is 5.57 m, and the critical velocity corresponding to repeated explosion is 24.20 cm/s, the damage radius is 7.56 m. The largest explosive dose is deduced by two ways mentioned above according to the Sadaovsk Formula.
- mechanics of explosion,
- blasting control,
- acoustic test,
- bedding rock slope,
- damage

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References

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