欢迎访问《兵工学报》官方网站,今天是 分享到:

兵工学报 ›› 2021, Vol. 42 ›› Issue (12): 2646-2654.doi: 10.3969/j.issn.1000-1093.2021.12.012

• 论文 • 上一篇    下一篇

水间隔装药孔壁爆炸应力分布规律

刘江超, 高文学, 张声辉, 李小帅   

  1. (北京工业大学 城市建设学部, 北京 100124)
  • 发布日期:2022-01-15
  • 通讯作者: 高文学(1962—),男,教授,博士生导师 E-mail:wxgao@bjut.edu.cn
  • 作者简介:刘江超(1991—),男,博士研究生。E-mail:ljcbjut@163.com
  • 基金资助:
    国家自然科学基金项目(51778025)

Distribution Law of Explosion Stress on Hole Wall of Water Interval Charge

LIU Jiangchao, GAO Wenxue, ZHANG Shenghui, LI Xiaoshuai   

  1. (Faculty of Architecture, Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)
  • Published:2022-01-15

摘要: 在隧道掘进过程中采用水封爆破时,水介质长度对爆破效果具有重要影响。为得到水间隔装药孔壁爆炸应力分布规律,采用Starfield迭加法将应力波的衰减和迭加考虑在内,推导孔壁受到的应力变化情况,并利用有限元分析软件ANSYS/LS-DYNA对计算结果进行模拟验证。结果表明:在炸药和水介质交界处孔壁受到的应力最大,随着到交界处距离的增加,爆炸应力以指数函数的形式衰减;采用等效间隔起爆方式对不同药量的爆炸过程进行模拟,水间隔段孔壁爆炸应力模拟值和理论值衰减规律一致,二者在相同位置的应力误差保持在10%左右,同时水间隔段孔壁指定点受到的总应力随着药量的增加而增大;采用Starfield迭加法获取水间隔段孔壁爆炸应力的计算公式是合理的,能够为水封爆破的应用提供参考。

关键词: 水间隔装药, 孔壁爆炸应力, Starfield迭加法, 数值模拟

Abstract: The length of water medium has an important influence on the blasting effect when water infusion blasting is used in the process of tunnel excavation. Therefore,in order to get the distribution law of stress on hole wall of water interval charge,the Starfield superposition method is used to deduce the changing situation of stress on the hole wall,in which the attenuation and superposition of stress wave are considered,and ANSYS/LS-DYNA are used to verify the calculated results.The results show that the stress on the hole wall is the largest at the interface of explosive and water medium.With the increase in the distance from the interface,the explosion stress decreases in the form of exponential function.The equivalent interval initiation method is used to simulate the explosion processes of water interval charges with different charge masses.The attenuation law of simulated explosion stress on the hole wall in the water interval section is consistent with that of the theoretical explosion stress,and the error between simulated and theoretical explosion stresses at the same position is about 10%.The total stress on the hole wall of water interval section increases with the increase in charge mass.In conclusion,it is reasonable to use the Starfield superposition method to obtain the explosion stress formula of hole wall in water interval section.

Key words: waterintervalcharge, explosionstressonholewall, Starfieldsuperpositionmethod, numericalsimulation

中图分类号: