Deformation and Failure Modes of Large-Span Roadway Roof and Critical Time-Effective Roof Control Principle Based on Area Support
Source abstract
Abstract
To address the challenges of controlling coal roadway roofs with large spans, this study employed theoretical analysis, mechanical modeling, numerical simulation, and field testing to investigate the deformation and failure modes of large-span roadway roofs. An elastic foundation beam model for roof deformation under area support was established. The critical time-effective roof control principle and technology based on area support were proposed. Numerical simulation research and field trials of critical time-effective roof control using area support were conducted in the tailgate (open-off cut) of Panel II513 at the Huaibei Shuanglong Coal Mine. The results indicate that roof stability decreases with decreasing rock beam thickness and increasing span. The deformation and failure modes of large-span roadway roofs include anchor failure within the anchored zone and delamination outside the anchored zone. Case studies based on the mechanical model, numerical simulations, and field tests all demonstrate that the critical time-effective roof control technology utilizing hydraulic support for area support can significantly reduce roof deflection deformation.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geomechanics and Mining Engineering · Fire effects on concrete materials · Structural Response to Dynamic Loads
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China
School of Civil Engineering, Xuzhou University of Technology, Xuzhou 221018, China
School of Mathematics, Jiangsu Center for Applied Mathematics, Xuzhou 221116, China
Funding
National Key Research and Development Plan · National Natural Science Foundation of China · Young Elite Scientists Sponsorship Program by CAST
References (26)
Show source-provided references
1. Research and practice of intelligent coal mine technology systems in China10.1007/s40789-022-00491-3 ↗
2. Pu, L., Liu, Y., Cai, Y., Sun, Z., and Zhou, X. (2023). Study on Active Support Parameters for Surrounding Rock with Ultra-Large Span Open-Off Cut in Thick Coal Seam. Appl. Sci., 13.10.3390/app132312804 ↗
3. Failure Mechanism and Numerical Simulation of Surrounding Rock of Long-span Rectangular Roadway
4. Utilising the scientific method to demonstrate that slender beam/column behaviour is the dominant behavioural mechanism leading to roof/rib failure10.1016/j.ijmst.2021.07.009 ↗
5. Brady, B., and Brown, E. (2004). Rock Mechanics for Underground Mining, Springer Science & Business Media.
6. Failure analysis of a large span longwall drift under water-rich roofs and its control techniques10.1016/j.engfailanal.2016.05.028 ↗
7. Failure Mechanism and Control Technology for a Large-Section Roadway under Weakly Cemented Formation Condition
8. Failure mechanism and safety control strategy for laminated roof of wide-span roadway10.1016/j.engfailanal.2020.104489 ↗
9. Stability Analysis and Control Measures of Large-Span Open-Off Cut with Argillaceous Cemented Sandstone Layered Roof
10. Han, C., Zhang, N., Yang, H., Zhao, Q., and Song, K. (2023). Discontinuous Deformation Characteristics of Deep Buried Roadway Roofs and Linkage Control of Thick Layer Cross-Boundary Anchorage: A Case Study. Energies, 16.10.3390/en16052160 ↗
11. Fundamentals of coal mine roof support. New Technology for Coal Mine Roof Support
12. Theory of continuous beam control and high efficiency supporting technology in coal roadway
13. Xie, Z., Zhang, N., Wei, Q., Wang, J., and Sharifzadeh, M. (2021). Study on mechanical properties and application of a new flexible bolt. Appl. Sci., 11.10.3390/app11030924 ↗
14. Han, C., Yuan, Y., Ding, G., Li, W., Yang, H., and Han, G. (2023). The Active Roof Supporting Technique of a Double-Layer Flexible and Thick Anchorage for Deep Withdrawal Roadway under Strong Mining Disturbance. Appl. Sci., 13.10.3390/app132312656 ↗
15. Failure analysis and control measures of deep roadway with composite roof: A case study10.1007/s40789-022-00469-1 ↗
16. Stability influence factors analysis and construction of a deep beam anchorage structure in roadway roof10.1016/j.ijmst.2017.11.007 ↗
17. Cooperation technology of driving and supporting in large section coal roadway of deep mine and case analysis
18. Mechanism and application of full-anchor cable support mechanism for direct roof with thick soft rock in mining roadway
19. Research on Thick Layer Anchorage Control Technology of Deep High Ground Stress Roadway
20. Wei, X., Shahani, N., Zheng, X., Wang, J., Wang, Y., Chen, C., and Ren, Z. (2023). The retention and control technology for rock beams in the roof of the roadway: A case study. Processes, 11.10.3390/pr11061593 ↗
21. Roof control technology of mining roadway under the influence of advanced supporting pressure10.1155/2021/2049755 ↗
22. Developments and advanced applications of concrete-filled steel tubular (CFST) structures: Members10.1016/j.jcsr.2014.04.016 ↗
23. Ding, K., Wang, L., Tian, J., Ren, B., Jiang, C., and Wang, S. (2022). Design of a Highly Adaptable Advance Support for a Deep, Fully Mechanized Roadway and Analysis of Its Support Performance. Appl. Sci., 12.10.3390/app122412728 ↗
24. Liu, X., Hua, X., Liang, Y., and Li, C. (2024). Quantitative Research on Roof Deformation and Temporary Support Stiffness in Deep-Mine Gob-Side Entry Retaining by Roof Cutting. Appl. Sci., 14.10.3390/app14156520 ↗
25. Influence of rockbolt pretension on bolting behaviors by gravel bolting tests
26. Composite key stratum module of Winkler foundation and its mechanical properties