Numerical analysis of tunnel reinforcing influences on failure process of surrounding rock under explosive stress waves

被引：13
|
作者：
Zuo Yu-jun [1 ,2 ]
Tang Chun-an [3 ]
Zhu Wan-cheng [2 ]
Li Di-yuan [4 ]
Li Shu-cai [5 ]
机构：
[1] Dalian Univ, Res Ctr Numer Test Mat Failure, Dalian 116622, Peoples R China
[2] NE Univ, Ctr Rock Instabil & Seism Res, Shenyang 110004, Peoples R China
[3] Dalian Univ Technol, Sch Civil & Hydraul Engn, Dalian 116024, Peoples R China
[4] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China
[5] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2008年 / 15卷 / 05期
关键词：
tunnel reinforcing; numerical simulation; explosive stress wave; failure process; inhomogeneity;
D O I：
10.1007/s11771-008-0118-4
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Based on mesoscopic damage mechanics, numerical code RFPA(2D) (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 RFPA(2D); 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.
引用
收藏
页码：632 / 638
页数：7
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