基于ANSYS/LS-DYNA的岩石爆破结构数值模拟分析
投稿时间:2019-03-19  修订日期:2019-03-22  点此下载全文
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作者单位E-mail
孙西濛 北京市政路桥股份有限公司  
叶春琳 北京市政路桥股份有限公司  
胡燕川 北京市政路桥股份有限公司  
张凯 中国地质大学(北京)  
薛启龙 中国地质大学(北京) xql@cugb.edu.cn 
周鹏 中国地质大学(北京)  
中文摘要:等离子爆破技术是一种新型爆破技术,其爆破孔的设计对整个爆破效果及爆破效率起决定性的作用。本文基于ANSYS/LS-DYNA建立了爆破孔的有限元模型,并对爆炸荷载作用下掏槽孔孔壁压力及其破碎区进行了数值模拟,文中研究结果表明,爆破时畸变能的变化自始至终都基本呈椭圆形,孔径越小,积累的能量越大,对岩体破坏越大;孔深长度越短,能量积聚空间越小,爆破对岩体造成的破坏越大;孔深长度的改变对下部岩体影响较小,对中部岩体影响较大。此外由于爆炸实验多为破坏性实验,很难进行原型试验,因此使用数值模拟方法研究爆破孔的结构是可行的,可以作为实际工程的参考。
中文关键词:岩石爆破  数值模拟  爆破结构  爆破孔径  
 
Numerical Simulation Analysis of Rock Blasting Structure Based on ANSYS/LS-DYNA
Abstract:Plasma blasting technology is a new type of blasting technology. The design of blasting holes plays a decisive role in the overall blasting effect and blasting efficiency. In this paper, the finite element model of blasting hole is established based on ANSYS/LS-DYNA. The numerical simulation of the wall pressure and the fracture zone of the boring hole under blast loading is carried out. The results show that the distortion energy changes during blasting from beginning to end. It is basically elliptical, the smaller the aperture, the larger the accumulated energy, the greater the damage to the rock mass; the shorter the hole depth, the smaller the energy accumulation space, the greater the damage caused by the blasting to the rock mass; The lower rock mass has less impact and has a greater impact on the central rock mass. In addition, since the explosion experiment is mostly a destructive experiment, it is difficult to carry out the prototype test. Therefore, it is feasible to use the numerical simulation method to study the structure of the blasthole, which can be used as a reference for practical engineering.
keywords:rock blasting  numerical simulation  blasting structure  blasting aperture
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