柱状装药不同起爆方式的数值模拟研究

发布时间：2018-06-04 06:08

本文选题：柱状装药 + 起爆方式　；参考：《爆破》2016年02期

【摘要】：运用三维非线性动力有限元分析程序ANSYS/LS-DYNA对柱状装药3种起爆方式下的爆轰过程和岩石中的应力波传播特征进行模拟。分析不同起爆方式下岩石中应力波的叠加和传播过程,对比岩石的应力状态、应力水平和振动响应。分析结果表明:不同起爆方式下岩石中应力波的传播方向、大小不同,引起的振动响应也不同;反向起爆时岩石自由面的拉应力和振动速度峰值较正向起爆时大;反向起爆时孔底近区的应力水平较正向起爆和双向起爆时大。综合考虑岩石的应力和振动响应,可得反向起爆的爆破效果较正向起爆和双向起爆好。
[Abstract]:The three dimensional nonlinear dynamic finite element analysis program ANSYS/LS-DYNA is used to simulate the detonation process and stress wave propagation in rock under three initiation modes of cylindrical charge. The superposition and propagation of stress waves in rocks under different initiation modes are analyzed, and the stress state, stress level and vibration response of rocks are compared. The results show that the direction and magnitude of stress wave propagation are different, and the vibration response is different under different initiation modes, and the peak value of tensile stress and vibration velocity of rock free surface in reverse initiation is larger than that in positive initiation. The stress level near the bottom of the hole during reverse initiation is higher than that in positive and bidirectional initiation. Considering the stress and vibration response of rock, it is concluded that the blasting effect of reverse initiation is better than that of positive initiation and bidirectional initiation.
【作者单位】：中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心;中国地质大学(武汉)工程学院;
【基金】：国家自然科学基金资助项目(41372312;51379194) 武汉市“黄鹤英才(科技)计划”资助项目湖北省自然科学基金(2014CFB894) 中央高校基本科研业务费专项资金资助项目(CUGL140817) 中国博士后科学基金资助项目(2014M552113) 岩土钻掘与防护教育部工程研究中心开放基金(201401)
【分类号】：TB41

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