起爆方式对爆轰波传播特性的影响研究
Study of the effect of initiation method on the propagation characteristics of detonation wave
郭建 1孙博闻 1姚颖康 2王海亮 3缪玉松 1张义平4
作者信息
- 1. 青岛理工大学 理学院,青岛 266525
- 2. 江汉大学 爆破工程湖北省重点实验室,武汉 430056
- 3. 山东科技大学 安全与环境工程学院,青岛 266590
- 4. 贵州大学 矿业学院,贵阳 550025
- 折叠
摘要
为探究爆轰波碰撞对爆轰压力分布规律的影响,采用理论推导、数值模拟和现场试验相结合的方法,分析了不同起爆方式下炸药内部和外部爆轰压力的变化规律.研究结果表明:爆轰波发生碰撞后,依次产生正碰撞、斜碰撞及马赫反射现象,最大爆轰压力可达到稳定爆轰压力的 3 倍以上;采用对称双线性起爆方式时,土体聚能侧所受爆轰压力是起爆侧的 2.74 倍,轴向所受爆轰压力较单侧线性起爆方式提升了 75%.基坑爆破试验结果表明:采用对称双线性起爆方式时,沿爆轰波碰撞聚能方向呈一字型布置起爆,炮孔间的贯通效果相较于单侧线性起爆方式得到了明显提升.
Abstract
In order to investigate the influence of detonation wave collision on the distribution of detonation pressure,a comprehensive approach combining theoretical derivation,numeri-cal simulation and field experimentation was employed to analyze the changes in the internal and external detonation pressure of explosives under various detonation modes.The study findings reveal that following detonation wave collision,normal collision,oblique collision and Mach reflection phenomena occur sequentially,with the maximum detonation pressure being more than 3 times that of the stable detonation pressure.When employing the sym-metrical bilinear detonation method,the detonation pressure on the energy side is 2.74 times that on the detonation side,and the axial detonation pressure increases by 75%compared to the single-side linear detonation method.Results from foundation pit blasting tests demon-strate that using the symmetrical bilinear detonation method leads to a straight-line arrange-ment of detonations along the direction of detonation wave collision and energy collection,significantly enhancing penetration effects between blast holes compared to the unilateral lin-ear detonation method.
关键词
聚能爆破/爆轰波碰撞/起爆方式/数值模拟/基坑爆破Key words
cumulative blasting/detonation wave collision/initiation method/numerical simulation/pit blasting引用本文复制引用
出版年
2024
NETL
NSTL
万方数据