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Coal Engineering ›› 2026, Vol. 58 ›› Issue (6): 128-136.doi: 10.11799/ce202606017

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Deformation and failure behavior of deep mining roadway surrounding rock and zoned advanced support #br#

  

  • Received:2025-09-22 Revised:2026-01-15 Online:2026-06-15 Published:2026-06-24

Abstract:

In deep buried roadways, the advanced section often experiences rock fragmentation and crack development due to mining activities, leading to significant deformation and potential instability, which seriously threatens underground safety. To investigate the failure and deformation behavior of such roadways, this study takes the 13207 belt entry in Wuju Coal Mine as a case study. Loose circle detection was conducted, followed by the establishment of a numerical model to analyze the zoning of the advanced section under abutment stress. The stress distribution and failure characteristics of the roadway were revealed. Targeted zoning support designs were proposed and validated through field monitoring data. Key findings include: (1) Based on stress distribution, the area within 10 m ahead of the working face is identified as the stress concentration zone, 10–27.5 m as the stress decay zone, and beyond 27.5 m as the original rock stress zone; (2) The stress concentration zone exhibits the most severe deformation, particularly at the ribs. When the face advanced 200 m, rib deformation reached 843.27 mm, which is 3.17 times the roof subsidence and 2.42 times the floor heave; (3) Plastic failure is pronounced at the ribs, with the plastic zone gradually decreasing with increasing distance from the face; (4) A "three-beam three-column" support method was applied in the stress concentration zone. Monitoring showed that surrounding rock deformation decreased by over 40% after reinforcement, demonstrating the effectiveness of the support design.

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