Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology
Soft broken surrounding rock exhibits obvious rheological properties and time-dependent weakening effects under the action of deep high-ground stress, leading to the increasingly prominent problem of sustained large deformation in deep roadways. In this study, with the II5 Rail Rise in Zhuxianzhuang...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/7/4641 |
| _version_ | 1797608225071169536 |
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| author | Bowen Wu Jucai Chang Chuanming Li Tuo Wang Wenbao Shi Xiangyu Wang |
| author_facet | Bowen Wu Jucai Chang Chuanming Li Tuo Wang Wenbao Shi Xiangyu Wang |
| author_sort | Bowen Wu |
| collection | DOAJ |
| description | Soft broken surrounding rock exhibits obvious rheological properties and time-dependent weakening effects under the action of deep high-ground stress, leading to the increasingly prominent problem of sustained large deformation in deep roadways. In this study, with the II5 Rail Rise in Zhuxianzhuang Coal Mine as an example, the mechanism and control technology of time-dependent damage and instability in a deep soft-rock roadway were explored through a field observation and numerical simulation. The research results show that the range of the loose circle in the deep fractured surrounding rock can reach 3.0 m. The expansion of shallow and deep cracks causes the primary plastic deformation and secondary rheological deformation of the surrounding rock, with the rheological deformation rate increasing by 21.4% every 55 days on average, which ultimately induces the instability and failure of the surrounding rock. Based on the mechanism of roadway instability, a control technology of high-preload bolt + deep- and shallow-borehole crack filling was proposed. The technology reduces deformation and ensures the stability of the roadway surrounding rock by inhibiting the propagation of deep and shallow cracks and reinforcing the surrounding rock. |
| first_indexed | 2024-03-11T05:41:32Z |
| format | Article |
| id | doaj.art-0d50fa5759c2400694a5674123c266b9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T05:41:32Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-0d50fa5759c2400694a5674123c266b92023-11-17T16:23:30ZengMDPI AGApplied Sciences2076-34172023-04-01137464110.3390/app13074641Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement TechnologyBowen Wu0Jucai Chang1Chuanming Li2Tuo Wang3Wenbao Shi4Xiangyu Wang5School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSoft broken surrounding rock exhibits obvious rheological properties and time-dependent weakening effects under the action of deep high-ground stress, leading to the increasingly prominent problem of sustained large deformation in deep roadways. In this study, with the II5 Rail Rise in Zhuxianzhuang Coal Mine as an example, the mechanism and control technology of time-dependent damage and instability in a deep soft-rock roadway were explored through a field observation and numerical simulation. The research results show that the range of the loose circle in the deep fractured surrounding rock can reach 3.0 m. The expansion of shallow and deep cracks causes the primary plastic deformation and secondary rheological deformation of the surrounding rock, with the rheological deformation rate increasing by 21.4% every 55 days on average, which ultimately induces the instability and failure of the surrounding rock. Based on the mechanism of roadway instability, a control technology of high-preload bolt + deep- and shallow-borehole crack filling was proposed. The technology reduces deformation and ensures the stability of the roadway surrounding rock by inhibiting the propagation of deep and shallow cracks and reinforcing the surrounding rock.https://www.mdpi.com/2076-3417/13/7/4641deep roadwaysoft rocktime-dependent damagecrack fillingstability analysis |
| spellingShingle | Bowen Wu Jucai Chang Chuanming Li Tuo Wang Wenbao Shi Xiangyu Wang Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology Applied Sciences deep roadway soft rock time-dependent damage crack filling stability analysis |
| title | Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology |
| title_full | Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology |
| title_fullStr | Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology |
| title_full_unstemmed | Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology |
| title_short | Mechanism of Time-Dependent Instability of Deep Soft-Rock Roadway and Crack-Filling Reinforcement Technology |
| title_sort | mechanism of time dependent instability of deep soft rock roadway and crack filling reinforcement technology |
| topic | deep roadway soft rock time-dependent damage crack filling stability analysis |
| url | https://www.mdpi.com/2076-3417/13/7/4641 |
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