Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress
Stability of surrounding rock mass and safety of supporting system in mining tunnel are always dominated by fault near excavation limit. The influence degree of the fault varies significantly under different fault distances to mining tunnel and initial stresses condition. In this paper, a series of...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/2054938 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850158623218466816 |
|---|---|
| author | Zhiqiang Zhang Fangfang Chen Ning Li Mingming He |
| author_facet | Zhiqiang Zhang Fangfang Chen Ning Li Mingming He |
| author_sort | Zhiqiang Zhang |
| collection | DOAJ |
| description | Stability of surrounding rock mass and safety of supporting system in mining tunnel are always dominated by fault near excavation limit. The influence degree of the fault varies significantly under different fault distances to mining tunnel and initial stresses condition. In this paper, a series of numerical experiments are conducted to study the displacement, stress, and plastic region in surrounding rock mass. The stress characteristics in sprayed concrete layer are analyzed to study the influence of the fault distance on excavation limit and the initial stress in ground. The fault distance is defined geometrically by a mutual perpendicular line between the excavation limit and fault line nearest to the mining tunnel to quantify the influence. In order to simulate fault specialty reasonably, an interface model based on the theory of cohesive joint element is proposed in the numerical experiment model. Some other disciplinary and quantificational regularities about the influence of the fault distance and tectonic stress are summarized based on the numerical results. The results show that there is a critical distance to judge whether a fault has a prominent influence to mining tunnel. The critical distance depends on the quality of mining tunnel surrounding rock mass, initial stress, and the degree of excavation limit curvature. With the increase of lateral stress coefficient, the vertical displacement at crown decreases, but the horizontal displacement increases in the both right and left sidewalls. |
| format | Article |
| id | doaj-art-65afa29ebfcd488b8d300c954039f63d |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-65afa29ebfcd488b8d300c954039f63d2025-08-20T02:23:49ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/20549382054938Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic StressZhiqiang Zhang0Fangfang Chen1Ning Li2Mingming He3Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710056, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaStability of surrounding rock mass and safety of supporting system in mining tunnel are always dominated by fault near excavation limit. The influence degree of the fault varies significantly under different fault distances to mining tunnel and initial stresses condition. In this paper, a series of numerical experiments are conducted to study the displacement, stress, and plastic region in surrounding rock mass. The stress characteristics in sprayed concrete layer are analyzed to study the influence of the fault distance on excavation limit and the initial stress in ground. The fault distance is defined geometrically by a mutual perpendicular line between the excavation limit and fault line nearest to the mining tunnel to quantify the influence. In order to simulate fault specialty reasonably, an interface model based on the theory of cohesive joint element is proposed in the numerical experiment model. Some other disciplinary and quantificational regularities about the influence of the fault distance and tectonic stress are summarized based on the numerical results. The results show that there is a critical distance to judge whether a fault has a prominent influence to mining tunnel. The critical distance depends on the quality of mining tunnel surrounding rock mass, initial stress, and the degree of excavation limit curvature. With the increase of lateral stress coefficient, the vertical displacement at crown decreases, but the horizontal displacement increases in the both right and left sidewalls.http://dx.doi.org/10.1155/2019/2054938 |
| spellingShingle | Zhiqiang Zhang Fangfang Chen Ning Li Mingming He Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress Advances in Civil Engineering |
| title | Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress |
| title_full | Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress |
| title_fullStr | Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress |
| title_full_unstemmed | Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress |
| title_short | Influence of Fault on the Surrounding Rock Stability for a Mining Tunnel: Distance and Tectonic Stress |
| title_sort | influence of fault on the surrounding rock stability for a mining tunnel distance and tectonic stress |
| url | http://dx.doi.org/10.1155/2019/2054938 |
| work_keys_str_mv | AT zhiqiangzhang influenceoffaultonthesurroundingrockstabilityforaminingtunneldistanceandtectonicstress AT fangfangchen influenceoffaultonthesurroundingrockstabilityforaminingtunneldistanceandtectonicstress AT ningli influenceoffaultonthesurroundingrockstabilityforaminingtunneldistanceandtectonicstress AT mingminghe influenceoffaultonthesurroundingrockstabilityforaminingtunneldistanceandtectonicstress |