Source model for blasting vibration

作     者：丁桦 郑哲敏 

作者机构：Division of Engineering Sciences Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2002年第45卷第4期

页      面：395-407页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 071102[理学-系统分析与集成] 081103[工学-系统工程] 

基　　金：Acknowledgements This paper covers part of the project "The design and research on the demolition by blasting in the third stage of cofferdam Construction in Three Gorges of Yangtze River" supported by Three Gorge Project Construction Corporation. The work of all members of the research group of the project is fully acknowledged the experimental data obtained by them in some severe conditions are the basis of this work 

主　　题：blasting vibration, equivalent source, finite element method 

摘      要：By analyzing and comparing the experimental data, the point source moment theory and the cavity theory, it is concluded that the vibrating signals away from the blasting explosive come mainly from the natural vibrations of the geological structures near the broken blasting area. The source impulses are not spread mainly by the inelastic properties (such as through media damping, as believed to be the case by many researchers) of the medium in the propagation pass, but by this structure. Then an equivalent source model for the blasting vibrations of a fragmenting blasting is proposed, which shows the important role of the impulse of the source s time function under certain conditions. For the purpose of numerical simulation, the model is realized in FEM, The finite element results are in good agreement with the experimental data.