Numerical analysis of tunnel reinforcing influences on failure process of surrounding rock under explosive stress waves
来源期刊：中南大学学报(英文版)2008年第5期
论文作者：左宇军 唐春安 朱万成 李地元 李术才
文章页码：632 - 632
Key words：tunnel reinforcing; numerical simulation; explosive stress wave; failure process; inhomogeneity
Abstract: Based on mesoscopic damage mechanics, numerical code RFPA2D (dynamic edition) was developed to analyze the influence of tunnel reinforcing on failure process of surrounding rock under explosive stress waves. The results show that the propagation phenomenon of stress wave in the surrounding rock of tunnel and the failure process of surrounding rock under explosive stress waves are reproduced realistically by using numerical code RFPA2D; from the failure process of surrounding rock, the place at which surrounding rock fractures is transferred because of tunnel reinforcing, and the rockfall and collapse caused by failure of surrounding rock are restrained by tunnel reinforcing; furthermore, the absolute values of peak values of major principal stress, and the minimal principal stress and shear stress at center point of tunnel roof are reduced because of tunnel reinforcing, and the displacement at center point of tunnel roof is reduced as well, consequently the stability of tunnel increases.
基金信息：the National Natural Science Foundation of China
Major State Basic Research Development Program of China
Postdoctoral Science Foundation of China
