节理岩体中爆炸应力波传播规律的研究

发布时间：2018-06-17 00:30

本文选题：爆炸应力波 + ricker子波　；参考：《金属矿山》2016年06期

【摘要】：为了研究爆炸应力波在岩体中的传播过程,建立了基于ABAQUS/EXPLICIT的有限元数值模型,采用ricker子波作为爆炸场源,并将得到的数值结果与现有文献相比较,充分说明了采用ricker子波作为爆炸源模拟爆炸应力波传播问题的可行性。研究结果表明:炸药起爆后,按照时间顺序,岩体中先后呈现3种应力状态,即径向压应力与环向压应力形成的复合压剪应力场、径向拉应力与环向拉应力形成的复合拉剪应力场、径向压应力与环向拉应力形成的复合拉剪应力场。爆炸应力波在节理两端产生的反射波和衍射波与爆炸应力波的相互叠加使节理两端的应力显著增强,并最终促使爆生翼裂纹从节理两端起裂扩展。
[Abstract]:In order to study the propagation process of explosive stress wave in rock mass, a finite element numerical model based on Abaqus / EXPLICIT is established. The ricker wavelet is used as the source of explosion field, and the numerical results are compared with the existing literatures. The feasibility of using ricker wavelet as an explosion source to simulate the propagation of explosive stress wave is fully explained. The results show that, after detonation, there are three stress states in rock mass according to the time sequence, that is, the composite compressive shear stress field formed by radial compressive stress and circumferential compressive stress. The composite tensile shear stress field formed by radial tensile stress and toroidal tensile stress, and the composite tensile shear stress field formed by radial compressive stress and toroidal tensile stress. The superposition of the reflected wave and diffraction wave and the explosive stress wave at the two ends of the joint enhances the stress at the two ends of the joint, and finally promotes the initiation and propagation of the crack at the two ends of the joint.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家自然科学基金煤炭联合基金重点项目(编号:51134025) 高等学校学科创新引智计划项目(编号:B14006)
【分类号】：TU45;O382.2

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