SPH-FEM耦合爆破损伤分析方法的实现与验证

doi:10.13722/j.cnki.jrme.2014.0104

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摘要岩体爆破全方位数值仿真一直是爆破工程界的难点和热点。基于LS-DYNA二次开发技术，在爆破损伤方法中引入光滑粒子流体动力学(SPH)法，实现爆破近区采用SPH粒子，远区采用有限元法(FEM)计算的SPH-FEM耦合的空间全方位爆破损伤计算方法。结合具体工程实例，对深孔梯段爆破的动力效应进行全方位的数值仿真，并采用实测振动资料对该方法的精确性进行验证。计算结果表明：临空面一侧岩体的开裂与抛掷证明SPH-FEM可以实现模拟爆破近区岩体的大变形等非连续的特征，同时爆破振动监测的对比结果论证SPH-FEM方法有具备预测爆破中远区振动等动力响应的作用，比较不同抵抗线条件下的深孔台阶爆破条件的爆破近区变形与损伤特性，研究成果可对爆破的精细化数值仿真和爆破破碎机制研究提供一定的参考。

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关键词 ：岩石力学, 损伤, 开挖, 光滑粒子流体动力学, 有限元法, 耦合

Abstract：Comprehensive numerical simulation of rock blasting is always a difficulty and a focus topic of blasting engineering. Based on the secondary development of LS-DYNA，smoothed particle hydrodynamics(SPH) method is implemented into the blasting damage method. Then，a method of SPH used in the near zone and FEM used in the far zone was realized. Dynamic effect of deep hole bench blasting was simulated with this method based on the Specific engineering example. Rock mass cracking and throwing reveals that SPH-FEM method could simulate the large deformation in the near zone. At the same time the comparison between blasting vibration monitoring and results demonstrate that SPH-FEM method could forecast the blasting vibration and dynamic response in far zone. Deformation and damage characteristics of different resistance line of deep hole bench blasting were compared. Research results can provide certain reference for numerical simulation of blasting and blasting crushing mechanism research.

Key words： rock mechanics damage excavation smooth particle hydrodynamics(SPH) finite element method (FEM) coupling

引用本文:

胡英国1，2，卢文波1，2，陈明1，2，严鹏1，2，刘亮1，2. SPH-FEM耦合爆破损伤分析方法的实现与验证[J]. 岩石力学与工程学报, 2015, 34(s1): 2740-2748.
HU Yingguo1，2，LU Wenbo1，2，CHEN Ming1，2，YAN Peng1，2，LIU Liang1，2. IMPLEMENTATION AND VERIFICATION OF SPH-FEM COUPLING BLASTING DAMAGE ANALYTICAL METHOD. , 2015, 34(s1): 2740-2748.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0104 或 http://www.rockmech.org/CN/Y2015/V34/Is1/2740

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