基于非连续变形分析方法的爆破荷载下不同类别岩体的动力响应

鉴于工程岩体的不连续性,将爆破荷载进行简单等效之后,将非连续变形分析方法引入研究爆破荷载下不同类别岩体的动力响应问题。分析结果表明,不同坚硬程度和不同完整程度的岩体中爆破荷载的动力响应区别明显,坚硬程度愈高,完整程度愈好,则同样距离情况下岩石的起始振动时间愈早,振速峰值愈高。

Dynamic response of different rock under blasting load based on discontinuous deformation analysis

As the main basis of evaluating the adverse effect induced by blasting load,dynamic response of rock is crucial and numerical methods have become important tools to study this problem.In view of the discontinuity of rock,blasting load is simplified equivalently and discontinuous deformation analysis(DDA) method is introduced to study dynamic response of different rock under blasting load in this paper.The results show that for rocks of various hardness and integrity,dynamic response is quite different.At the same distance from blasting borehole,rocks of higher hardness and higher integrity will obtain earlier starting vibration time and higher peak vibration velocity.