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| Monitoring and Analysis of Vibration Effects Due to Squeezing Silt by Blasting at the Special Terrain |
| XU Xueyong WANG REN WU Jingping SUN Xuejun |
| (Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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Abstract
This paper aims to monitor and analyze the vibration effect due to squeezing silt by blasting according to engineering example at the special terrain. Results show that the measured vibration velocity is in the safety-judging standard that norm demands, and the decay law of blasting shock wave obtained by linear regression method is mostly consistent with that of norm. At the same time, the results discover that the main vibration frequency of blasting shock wave which is due to squeezing silt by blasting is low. This means that spread medium has great decay action on shock wave, and the high frequency of shock wave measured decays quickly. Natural frequency of blasting area surroundings is on average lower than 10Hz, so in order to avoid the damage caused by resonance, it is necessary to strictly control blasting vibration velocity and increase the numbers of times of monitoring.
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Received: 22 November 2007
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Corresponding Authors:
XU Xueyong
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2009, Vol. 28 
