Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model
Zonal disintegration, a phenomenon of fractured zones and intact zones distributed alternately in deep rock mass, is different from the excavation-damaged zone of shallow rock mass. In this study, bonded block model of 3DEC was employed to study the fracture mode and origination condition of zonal d...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/3589417 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832563368999780352 |
|---|---|
| author | Qingteng Tang Wenbing Xie Xingkai Wang Zhili Su Jinhai Xu |
| author_facet | Qingteng Tang Wenbing Xie Xingkai Wang Zhili Su Jinhai Xu |
| author_sort | Qingteng Tang |
| collection | DOAJ |
| description | Zonal disintegration, a phenomenon of fractured zones and intact zones distributed alternately in deep rock mass, is different from the excavation-damaged zone of shallow rock mass. In this study, bonded block model of 3DEC was employed to study the fracture mode and origination condition of zonal disintegration. Initiation, propagation, and coalescence progress of fracture around the roadway boundary under different triaxial stress conditions are elaborated. Numerical simulation demonstrated that zonal disintegration may occur when the direction of maximum principal stress is parallel to the roadway axis. It is interesting to find that the fracture around the roadway boundary traced the line of a spiral line, while slip-line fractures distributed apart from the roadway boundary. The extent of the alternate fracture zone decreased as the confining pressure increased, and alternate fracture zone was no longer in existence when the confining pressure reaches a certain value. Effects of roadway shape on zonal disintegration were also studied, and the results indicated that the curvature of the fracture track line tends to be equal to the roadway boundary in shallow surrounding rock of the roadway, while the fractures in deep surrounding rock seems unaffected by the roadway shape. Those findings are of great significance to support design of deep underground openings. |
| format | Article |
| id | doaj-art-895189768c3640bbbae1340e40c713ae |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-895189768c3640bbbae1340e40c713ae2025-02-03T01:20:25ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/35894173589417Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block ModelQingteng Tang0Wenbing Xie1Xingkai Wang2Zhili Su3Jinhai Xu4State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, ChinaZonal disintegration, a phenomenon of fractured zones and intact zones distributed alternately in deep rock mass, is different from the excavation-damaged zone of shallow rock mass. In this study, bonded block model of 3DEC was employed to study the fracture mode and origination condition of zonal disintegration. Initiation, propagation, and coalescence progress of fracture around the roadway boundary under different triaxial stress conditions are elaborated. Numerical simulation demonstrated that zonal disintegration may occur when the direction of maximum principal stress is parallel to the roadway axis. It is interesting to find that the fracture around the roadway boundary traced the line of a spiral line, while slip-line fractures distributed apart from the roadway boundary. The extent of the alternate fracture zone decreased as the confining pressure increased, and alternate fracture zone was no longer in existence when the confining pressure reaches a certain value. Effects of roadway shape on zonal disintegration were also studied, and the results indicated that the curvature of the fracture track line tends to be equal to the roadway boundary in shallow surrounding rock of the roadway, while the fractures in deep surrounding rock seems unaffected by the roadway shape. Those findings are of great significance to support design of deep underground openings.http://dx.doi.org/10.1155/2019/3589417 |
| spellingShingle | Qingteng Tang Wenbing Xie Xingkai Wang Zhili Su Jinhai Xu Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model Advances in Civil Engineering |
| title | Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model |
| title_full | Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model |
| title_fullStr | Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model |
| title_full_unstemmed | Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model |
| title_short | Numerical Study on Zonal Disintegration of Deep Rock Mass Using Three-Dimensional Bonded Block Model |
| title_sort | numerical study on zonal disintegration of deep rock mass using three dimensional bonded block model |
| url | http://dx.doi.org/10.1155/2019/3589417 |
| work_keys_str_mv | AT qingtengtang numericalstudyonzonaldisintegrationofdeeprockmassusingthreedimensionalbondedblockmodel AT wenbingxie numericalstudyonzonaldisintegrationofdeeprockmassusingthreedimensionalbondedblockmodel AT xingkaiwang numericalstudyonzonaldisintegrationofdeeprockmassusingthreedimensionalbondedblockmodel AT zhilisu numericalstudyonzonaldisintegrationofdeeprockmassusingthreedimensionalbondedblockmodel AT jinhaixu numericalstudyonzonaldisintegrationofdeeprockmassusingthreedimensionalbondedblockmodel |