标题：Numerical analysis of blast wave propagation in rock mass containing weak interlayer
作者：Tian, Zhen-Nong ;Zhang, Le-Wen
作者机构：[Tian, Zhen-Nong ;Zhang, Le-Wen ] School of Civil Engineering, Shandong University, Jinan 250061, China
来源：Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology
关键词：Blast wave; Discrete element; Energy dissipation; Explosion source model; Finite element; Numerical simulation; Rock mass; Stress wave attenuation; Weak interlayer
摘要：In order to simulate the influence of the weak interlayer in rock mass on the propagation attenuation of blast wave, the numerical calculating method including the basic equations, solution procedures and equivalent modes of energy dissipation was improved on the basis of block discrete element. The improved method will fit to simulate the characteristics of explosion source, properties of weak interlayer in rock mass and propagation attenuation rule of stress wave. The numerical models of both rock mass containing weak interlayer and explosion source were established with the improved method. And the numerical tests were carried out for the influence of the weak interlayer in rock mass on the propagation attenuation of blast wave. The results show that the difference in vibration velocity peak on both sides of weak interlayer is considerably great. The distance between the weak interlayer and explosion source has the large influence on the attenuation of stress wave, while the thickness of weak interlayer has a little influence on it. In addition, the duration of particle vibration between two group of weak interlayers becomes longer significantly. The numerical simulation not only gives the transmission and reflection relationship of blast wave passing through weak interlayer, but also represents the basic forms of particle vibration in different cases, which may provide a reference for practical engineering.