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《Guangzhou Architecture》 2008-06
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A Compound Charge Structure and Application in City Tunnel Rock Mass Blast Engineering

CHEN Xiao-bin1,2 ZHANG Jia-sheng2 CUI Yi-bin1 ZHU Wen-bin3(1.Guangzhou Institute of Building Science, Guangzhou 510440)(2.School of Civil Engineering, Central South University, Changsha 410075)(3.Xiamen Highway Bureau, Xiamen 361009)  
The urban resident and buildings are sensitive to blast shake, so the blast shake weakening design was always a critical problem for urban city tunnel blast construction.According to the analysis of explosion wave diffusion properties, a compound charge structure was provided for blast shake weakening in this paper.This compound charge structure consisted of a big charge column and a small charge column, which led the explosion wave diffuse into the radial direction.The shock wave energy to the reserved rock mass was reduced and the blast shake was weakened by the compound charge structure.The application of the compound charge structure showed that this charge structure had obvious shake weakening effect and high rock mass crash efficiency.
【CateGory Index】: U455.6
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