Abstract
A FEM-based numerical study is carried out to investigate the dynamic responses of underground openings in jointed rock masses. The heterogeneity and damage process of rocks are taken consideration in the numerical study. Effects of joint normal stiffness, joint spacing, joint orientation, amplitude of applied stress wave, cylindrical wave and tensile wave on the measured Peak Particle Velocity (PPV) around the tunnel are addressed. The simulation results show that the existence of joints has great influence on the stability of the underground tunnel. In addition, the cylindrical wave decays quickly due to both geometrical attenuation and joint reflection. The PPVs around the tunnel are highly dependent on the source location of the cylindrical wave and the wave amplitude. Furthermore, the large-amplitude tensile wave is difficult to transmit across the joints, because of the caused opening of joints. However, for the shallow buried tunnel, the reflected tensile waves from the ground surface may still lead to the instability of tunnel.
| Original language | English |
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| Title of host publication | Rock Dynamics |
| Subtitle of host publication | From Research to Engineering - 2nd International Conference on Rock Dynamics and Applications, ROCDYN 2016 |
| Publisher | CRC Press/Balkema |
| Pages | 355-360 |
| Number of pages | 6 |
| ISBN (Print) | 9781138029538 |
| Publication status | Published - 1 Jan 2016 |
| Event | 2nd International Conference on Rock Dynamics and Applications, ROCDYN 2016 - Suzhou, China Duration: 18 May 2016 → 19 May 2016 |
Conference
| Conference | 2nd International Conference on Rock Dynamics and Applications, ROCDYN 2016 |
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| Country/Territory | China |
| City | Suzhou |
| Period | 18/05/16 → 19/05/16 |
Keywords
- FEM
- Peak particle velocity
- Rock joint
- Underground opening
ASJC Scopus subject areas
- Geology