INVESTIGATION ON THE INFLUENCE OF FAULT ON THE DAMAGE BEHAVIOR OF UNDERGROUND OPENING
Both the far-field stress ratio and local geological structures play an important role in the stability of underground openings. Numerical tests are conducted to investigate the effects of the stress ratio and different dip angles of faults and the stability of underground openings. The damage of rock mass surrounding the opening is aligned to the minimum horizontal stress. Extensile cracking is a basic mechanism of breakout initiation, followed by a progressive detachment of rock flakes bounded by cracks, leading to V-shape cross-sections. Although the existing of faults induces the asymmetry of the failure mode, the high tectonic stress will dominate the stability of the openings. These results have referential and guiding significance to the site selection and layout, and help with the construction of deep underground openings of the same kind.
LIAN-CHONG LI GEN LI TIAN-HUI MA ZHENG-ZHAO LIANG
Center for Rock Instability and Seismicity Research, Dalian University of Technology Dalian, 116024, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1223-1228
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）