摘要
为探索定向大爆破时岩体中应力波的传播及其对岩石破坏的影响,本文介绍了以条形布药方式装药、药量为4t的现场洞室大爆破试验中,在药室下方基岩中的岩石应变及应力测试成果,给出了回归曲线及功率谱分析结果,讨论了岩体中爆炸应力波传播的特征参数。并提出了不同爆炸条件下岩体中某点应力波强度的分析预估方法及有关参数的选用,可供工程设计、施工时参考应用。
A large scale blasting test with a cylindrical charge of four tons in weight has been carried out in situ and the characteristics of the stress wave in rock mass induced by blasting have been analysed. Based on the measured data of stress and strain and by analysing the calculated pressure in rock, the selection of the initial incident pressure and the adequacy of using the attenuation index as a characteristic parameter to describe the propagation of stress wave in rock due to blasting are discussed. Finally, an empirical formula for calculating the pressure of a propagating stress wave in rock is given.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
1992年第4期364-372,共9页
Chinese Journal of Rock Mechanics and Engineering
关键词
应力波
岩体
试验
高坝
blasting, stress wave, stress and strain in rock, measurement in the vertical direction
