Roof Deformation Mechanism and Control Technology of Bottom‐Driven Roadway in Deep Thick Coal Seam.
Saved in:
| Title: | Roof Deformation Mechanism and Control Technology of Bottom‐Driven Roadway in Deep Thick Coal Seam. |
|---|---|
| Authors: | Peng, Yanghao1,2 (AUTHOR), Dai, Xianglin3 (AUTHOR) dxl1132554073@163.com, Peng, Zhenjie4 (AUTHOR), Ding, Aizhong1 (AUTHOR), Khandelwal, Manoj (AUTHOR) m.khandelwal@federation.edu.au |
| Source: | Advances in Civil Engineering. 6/30/2026, Vol. 2026, p1-15. 15p. |
| Subjects: | Timoshenko beam theory, Mining engineering, Roads, Computer simulation, Rock mechanics, Deformations (Mechanics), Roof design & construction |
| Abstract: | During the mining of deep and thick coal seams, roadways are universally arranged along the seam floor due to the occurrence characteristic of large coal seam thickness. The roof of such bottom‐driven roadways features a coal–rock composite structure, which is highly susceptible to deformation and failure. Accordingly, how to effectively guarantee the stability of the coal–rock composite roof has become a core technical challenge in roadway support engineering. In this study, taking the bottom‐driven roadways in a deep thick coal seam as the research object, we systematically investigate the deformation and failure mechanism of the roof and propose a targeted surrounding rock control technology, using an integrated research method combining field investigation, theoretical analysis, numerical simulation, and field engineering application. Field monitoring results reveal that the core internal factors leading to severe failure of the bottom‐driven roadways surrounding rock are the large cross‐section, high in situ stress, coal–rock composite roof structure, and heterogeneity of coal mass properties. Meanwhile, the irrational design and insufficient engineering pertinence of the original support scheme further deteriorate the occurrence environment of the surrounding rock. In this study, four types of roof mechanical models, namely, the conventional simply supported beam, vertical and horizontal bending beam, Timoshenko beam model, and Timoshenko beam model under axial load, are compared and analyzed. Numerical simulation results verify that the Timoshenko beam model under axial load model has extremely high calculation accuracy. To address the aforementioned engineering challenge, a control scheme with rib–roof synergistic support as the core is proposed in this study. Field application results show that after the implementation of this control technology, the maximum roof‐to‐floor convergence of the roadway is controlled within 75 mm, the maximum rib‐to‐rib convergence is limited to 160 mm, and the total roof separation is only 7 mm, achieving an excellent support effect. This study can provide a theoretical basis and engineering reference for stability control of roadway surrounding rock under similar geological conditions. [ABSTRACT FROM AUTHOR] |
| Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | During the mining of deep and thick coal seams, roadways are universally arranged along the seam floor due to the occurrence characteristic of large coal seam thickness. The roof of such bottom‐driven roadways features a coal–rock composite structure, which is highly susceptible to deformation and failure. Accordingly, how to effectively guarantee the stability of the coal–rock composite roof has become a core technical challenge in roadway support engineering. In this study, taking the bottom‐driven roadways in a deep thick coal seam as the research object, we systematically investigate the deformation and failure mechanism of the roof and propose a targeted surrounding rock control technology, using an integrated research method combining field investigation, theoretical analysis, numerical simulation, and field engineering application. Field monitoring results reveal that the core internal factors leading to severe failure of the bottom‐driven roadways surrounding rock are the large cross‐section, high in situ stress, coal–rock composite roof structure, and heterogeneity of coal mass properties. Meanwhile, the irrational design and insufficient engineering pertinence of the original support scheme further deteriorate the occurrence environment of the surrounding rock. In this study, four types of roof mechanical models, namely, the conventional simply supported beam, vertical and horizontal bending beam, Timoshenko beam model, and Timoshenko beam model under axial load, are compared and analyzed. Numerical simulation results verify that the Timoshenko beam model under axial load model has extremely high calculation accuracy. To address the aforementioned engineering challenge, a control scheme with rib–roof synergistic support as the core is proposed in this study. Field application results show that after the implementation of this control technology, the maximum roof‐to‐floor convergence of the roadway is controlled within 75 mm, the maximum rib‐to‐rib convergence is limited to 160 mm, and the total roof separation is only 7 mm, achieving an excellent support effect. This study can provide a theoretical basis and engineering reference for stability control of roadway surrounding rock under similar geological conditions. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 16878086 |
| DOI: | 10.1155/adce/8075224 |
