The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics
Abstract In order to mitigate the risk of geological disasters induced by fault activation when roadways intersect reverse faults in coal mining, this paper uses a combination of mechanical models with PFC2D software. A mechanical model is introduced to represent various fault angles, followed by a...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | Deep Underground Science and Engineering |
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| Online Access: | https://doi.org/10.1002/dug2.12119 |
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| author | Shuaifeng Lu Andrew Chan Xiaolin Wang Shanyong Wang Zhijun Wan Jingyi Cheng |
| author_facet | Shuaifeng Lu Andrew Chan Xiaolin Wang Shanyong Wang Zhijun Wan Jingyi Cheng |
| author_sort | Shuaifeng Lu |
| collection | DOAJ |
| description | Abstract In order to mitigate the risk of geological disasters induced by fault activation when roadways intersect reverse faults in coal mining, this paper uses a combination of mechanical models with PFC2D software. A mechanical model is introduced to represent various fault angles, followed by a series of PFC2D loading and unloading tests to validate the model and investigate fault instability and crack propagation under different excavation rates and angles. The results show that (1) the theoretical fault model, impacted by roadway advancing, shows a linear reduction in horizontal stress at a rate of −2.01 MPa/m, while vertical stress increases linearly at 4.02 MPa/m. (2) At field excavation speeds of 2.4, 4.8, 7.2, and 9.6 m/day, the vertical loading rates for the model are 2.23, 4.47, 6.70, and 8.93 Pa/s, respectively. (3) Roadway advancement primarily causes tensile‐compressive failures in front of the roadway, with a decrease in tensile cracks as the stress rate increases. (4) An increase in the fault angle leads to denser cracking on the fault plane, with negligible cracking near the fault itself. The dominant crack orientation is approximately 90°, aligned with the vertical stress. |
| format | Article |
| id | doaj-art-2dff04b261bd404cbb6d0fa803a6cdd7 |
| institution | OA Journals |
| issn | 2097-0668 2770-1328 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Deep Underground Science and Engineering |
| spelling | doaj-art-2dff04b261bd404cbb6d0fa803a6cdd72025-08-20T02:35:30ZengWileyDeep Underground Science and Engineering2097-06682770-13282024-12-013439941210.1002/dug2.12119The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristicsShuaifeng Lu0Andrew Chan1Xiaolin Wang2Shanyong Wang3Zhijun Wan4Jingyi Cheng5School of Mines China University of Mining and Technology Xuzhou ChinaSchool of Engineering University of Tasmania Hobart AustraliaSchool of Engineering University of Tasmania Hobart AustraliaDiscipline of Civil, Surveying & Environmental Engineering, School of Engineering The University of Newcastle Callaghan AustraliaSchool of Mines China University of Mining and Technology Xuzhou ChinaSchool of Mines China University of Mining and Technology Xuzhou ChinaAbstract In order to mitigate the risk of geological disasters induced by fault activation when roadways intersect reverse faults in coal mining, this paper uses a combination of mechanical models with PFC2D software. A mechanical model is introduced to represent various fault angles, followed by a series of PFC2D loading and unloading tests to validate the model and investigate fault instability and crack propagation under different excavation rates and angles. The results show that (1) the theoretical fault model, impacted by roadway advancing, shows a linear reduction in horizontal stress at a rate of −2.01 MPa/m, while vertical stress increases linearly at 4.02 MPa/m. (2) At field excavation speeds of 2.4, 4.8, 7.2, and 9.6 m/day, the vertical loading rates for the model are 2.23, 4.47, 6.70, and 8.93 Pa/s, respectively. (3) Roadway advancement primarily causes tensile‐compressive failures in front of the roadway, with a decrease in tensile cracks as the stress rate increases. (4) An increase in the fault angle leads to denser cracking on the fault plane, with negligible cracking near the fault itself. The dominant crack orientation is approximately 90°, aligned with the vertical stress.https://doi.org/10.1002/dug2.12119excavation speedfault stabilityloading and unloading testroadway crossing faults |
| spellingShingle | Shuaifeng Lu Andrew Chan Xiaolin Wang Shanyong Wang Zhijun Wan Jingyi Cheng The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics Deep Underground Science and Engineering excavation speed fault stability loading and unloading test roadway crossing faults |
| title | The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics |
| title_full | The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics |
| title_fullStr | The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics |
| title_full_unstemmed | The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics |
| title_short | The influence of the disturbing effect of roadways through faults on the faults' stability and slip characteristics |
| title_sort | influence of the disturbing effect of roadways through faults on the faults stability and slip characteristics |
| topic | excavation speed fault stability loading and unloading test roadway crossing faults |
| url | https://doi.org/10.1002/dug2.12119 |
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