(1. State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan,Hubei 430072,China;2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering,Ministry of Education,
Wuhan University,Wuhan,Hubei 430072,China)
Abstract:Studies on the influence of blast-created free face on ground vibration in slope blasts with millisecond-delays are very significant for optimization and safety control in blasting excavation. A multiple-row bench blast test at Baihetan Hydropower Station was conducted to compare the blast-induced ground vibration from the first and followed delay in the same row. A SPH-FEM coupled model was also developed to simulate the fragmentation process and the blasting vibrations from different delays in the same row. The simulated results agreed well with the experiment results. If the charge weight and the blasting geometry parameters were the same in each blast delay,the ground vibration induced by the first delay will be larger than that of the followed one. The study indicated that the effect of the blast-created free face should be considered in the blasting design. From the perspective of vibration control,the charge weight of the first delay in every row should be less than that of the followed delays in the same row.
杨年华,张志毅. 隧道爆破振动控制技术研究[J]. 铁道工程学报,2010,27(1):82-86.(YANG Nianhua,ZHANG Zhiyi. Research on the control technology for tunnel blasting vibration[J]. Journal of Railway Engineering Society,2010,27(1):82-86.(in Chinese))
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