爆炸应力波在层状节理岩体中的传播规律试验研究  

Experimental study on propagation law of explosion stress wave in bedding joint rock mass

作　　者：孙冰[1] 袁登 曾晟[2] 刘其兵[2] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421001 [2]南华大学核资源工程学院,湖南衡阳421001

出　　处：《中国安全生产科学技术》2015年第11期118-123,共6页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(51204098);湖南省科技厅重点研发计划(2015SK2058-4)

摘　　要：为了研究爆炸应力波在岩体中的传播规律,基于相似理论,开展了爆炸应力波在层状节理岩体中衰减的实验研究。研究表明,节理阻碍应力波的传播且存在各向异性;对于垂直或小角度入射节理的应力波,在垂直方向和纵向的衰减很明显并且幅度较大,在横向衰减不明显;对于斜入射节理的应力波,横向和垂直方向没有明显的衰减,纵向的衰减很明显并且幅度较大;应力波的合成峰值速度与炮孔密集度之间的关系密切,当炮孔间距超过一定距离时,实际测得的速度时程为最近药包爆破产生的应力波,并非总药量产生的应力波的叠加。To investigate the propagation rule of explosion stress wave in rock mass, based on the similarity theory, the experiments were carried out to study the attenuation of explosive stress wave in the bedding joint rock mass. The results showed that the propagation of joint block stress wave exists anisotropy. For the stress wave of vertical or small angle incidence joint, the attenuation in vertical direction and longitudinal direction are obvious, with a larger range, while the attenuation in transverse direction is not obvious. For the stress wave of oblique incidence joint, the attenuation in transverse direction and vertical direction are not obvious, while the attenuation in longitudinal direction is obvious, with a larger range. The synthetic peak speed of explosion stress wave has a close relationship with blast hole intensity. When the spacing among each blast hole is more than a certain distance, the velocity-time curve of actual measuring is the stress wave produced by the explosion of recent charge, rather than the overlying of stress wave produced by the total charge.

关 键 词：爆炸应力波 层状节理岩体 应力波衰减 峰值速度 

分 类 号：X936[环境科学与工程—安全科学]