Study on the Upper Limit of Roof Failure in Soft Rock Roadway
This study addresses the issue of large deformation in soft rock roadways, using the 50213 tailgate of Guantun Coal Mine as a case study. Field investigations were conducted to assess the condition of roadway bolts, anchor cables, and the internal damage characteristics of the surrounding rock. The...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2023-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2023/3837106 |
| _version_ | 1827009847549231104 |
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| author | Jie Zhang Shoushi Gao Yifeng He Tao Yang Tong Li Yihui Yan Jianping Sun |
| author_facet | Jie Zhang Shoushi Gao Yifeng He Tao Yang Tong Li Yihui Yan Jianping Sun |
| author_sort | Jie Zhang |
| collection | DOAJ |
| description | This study addresses the issue of large deformation in soft rock roadways, using the 50213 tailgate of Guantun Coal Mine as a case study. Field investigations were conducted to assess the condition of roadway bolts, anchor cables, and the internal damage characteristics of the surrounding rock. The upper bound method of limit analysis in plastic mechanics was utilized to construct a failure model for the surrounding rock and derive the upper limit solution of roof failure by integrating the principle of virtual work and variational extremum theorem. Physical similarity simulations were employed to investigate the fracture distribution and evolution law of the surrounding rock. Based on the deformation and instability mechanism of the roadway, optimized support parameters for soft rock roadways were proposed and verified through numerical simulation. The results indicate that the surrounding rock of the sharp corner of the roadway is initially destroyed and develops upward with increasing stress. The interconnected horizontal separation cracks at the anchorage end of the anchor cable and shear fracture zones at the two corners ultimately lead to the overall instability of the anchorage arch. Furthermore, the theoretical calculation boundary exhibited significant similarity with the failure evolution law and distribution pattern. Following the adoption of the optimized support scheme, roof subsidence decreased by 46.7% compared to the original scheme, and the amount of movement on both sides decreased by 36.2%. The control effect of the surrounding rock was favorable, and its internal stability was significantly improved, thereby effectively resolving the issue of large deformation in soft rock roadways. |
| first_indexed | 2024-03-08T16:56:29Z |
| format | Article |
| id | doaj.art-056fda2f71fd4c66a8ef01fc718e9522 |
| institution | Directory Open Access Journal |
| issn | 1875-9203 |
| language | English |
| last_indexed | 2025-02-18T12:56:29Z |
| publishDate | 2023-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj.art-056fda2f71fd4c66a8ef01fc718e95222024-11-02T03:57:19ZengHindawi LimitedShock and Vibration1875-92032023-01-01202310.1155/2023/3837106Study on the Upper Limit of Roof Failure in Soft Rock RoadwayJie Zhang0Shoushi Gao1Yifeng He2Tao Yang3Tong Li4Yihui Yan5Jianping Sun6School of Energy ResourcesSchool of Energy ResourcesSchool of Energy ResourcesSchool of Energy ResourcesChina Coal Xi’an Design Engineering Co., Ltd.School of Energy ResourcesSchool of Energy ResourcesThis study addresses the issue of large deformation in soft rock roadways, using the 50213 tailgate of Guantun Coal Mine as a case study. Field investigations were conducted to assess the condition of roadway bolts, anchor cables, and the internal damage characteristics of the surrounding rock. The upper bound method of limit analysis in plastic mechanics was utilized to construct a failure model for the surrounding rock and derive the upper limit solution of roof failure by integrating the principle of virtual work and variational extremum theorem. Physical similarity simulations were employed to investigate the fracture distribution and evolution law of the surrounding rock. Based on the deformation and instability mechanism of the roadway, optimized support parameters for soft rock roadways were proposed and verified through numerical simulation. The results indicate that the surrounding rock of the sharp corner of the roadway is initially destroyed and develops upward with increasing stress. The interconnected horizontal separation cracks at the anchorage end of the anchor cable and shear fracture zones at the two corners ultimately lead to the overall instability of the anchorage arch. Furthermore, the theoretical calculation boundary exhibited significant similarity with the failure evolution law and distribution pattern. Following the adoption of the optimized support scheme, roof subsidence decreased by 46.7% compared to the original scheme, and the amount of movement on both sides decreased by 36.2%. The control effect of the surrounding rock was favorable, and its internal stability was significantly improved, thereby effectively resolving the issue of large deformation in soft rock roadways.http://dx.doi.org/10.1155/2023/3837106 |
| spellingShingle | Jie Zhang Shoushi Gao Yifeng He Tao Yang Tong Li Yihui Yan Jianping Sun Study on the Upper Limit of Roof Failure in Soft Rock Roadway Shock and Vibration |
| title | Study on the Upper Limit of Roof Failure in Soft Rock Roadway |
| title_full | Study on the Upper Limit of Roof Failure in Soft Rock Roadway |
| title_fullStr | Study on the Upper Limit of Roof Failure in Soft Rock Roadway |
| title_full_unstemmed | Study on the Upper Limit of Roof Failure in Soft Rock Roadway |
| title_short | Study on the Upper Limit of Roof Failure in Soft Rock Roadway |
| title_sort | study on the upper limit of roof failure in soft rock roadway |
| url | http://dx.doi.org/10.1155/2023/3837106 |
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