Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways.
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| Title: | Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways. |
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| Authors: | Wang, Ai‐Rong1 (AUTHOR), Peng, Tao1 (AUTHOR), Zhou, Kang2 (AUTHOR) sqt2300101060@student.cumtb.edu.cn, Song, Chong‐Yu2 (AUTHOR) |
| Source: | Energy Science & Engineering. Mar2026, Vol. 14 Issue 3, p1195-1212. 18p. |
| Subject Terms: | *Deformations (Mechanics), *Anchorage (Structural engineering), *Geotechnical engineering, *Stress concentration, *Material plasticity, *Mining methodology, *Rock mechanics |
| Abstract: | To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in the surrounding rock and the evolution laws of the plastic zone under such stress conditions using vector‐based analysis. The research revealed the asymmetrical failure characteristics of these roadways and proposed a flexible support strategy employing high‐elongation anchor cables to mitigate fracture risks in severely deformed zones. Industrial‐scale field trials were conducted to validate the proposed method. The key results are summarized as follows: (1) Based on the roadway conditions in the repeatedly mined sections of Buertai Coal Mine, the study identified the deformation and failure patterns of the surrounding rock. Under repeated mining impacts, the roadways experienced pronounced asymmetrical deformations, characterized by persistent rib spalling, floor heave, and frequent anchor cable fractures—significantly increasing roadway instability; (2) Numerical simulations were employed to analyze the stress field distribution and its evolution, identifying the development patterns of the plastic zone in the surrounding rock across different service phases. This clarified the mechanism behind the observed non‐uniform, large‐scale deformation; (3) A flexible support technology was designed and tested on‐site, utilizing flexible anchor cables capable of withstanding substantial deformations without fracturing. Field test results confirmed that these cables provide continuous support resistance, effectively maintaining the stability and integrity of the surrounding rock. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in the surrounding rock and the evolution laws of the plastic zone under such stress conditions using vector‐based analysis. The research revealed the asymmetrical failure characteristics of these roadways and proposed a flexible support strategy employing high‐elongation anchor cables to mitigate fracture risks in severely deformed zones. Industrial‐scale field trials were conducted to validate the proposed method. The key results are summarized as follows: (1) Based on the roadway conditions in the repeatedly mined sections of Buertai Coal Mine, the study identified the deformation and failure patterns of the surrounding rock. Under repeated mining impacts, the roadways experienced pronounced asymmetrical deformations, characterized by persistent rib spalling, floor heave, and frequent anchor cable fractures—significantly increasing roadway instability; (2) Numerical simulations were employed to analyze the stress field distribution and its evolution, identifying the development patterns of the plastic zone in the surrounding rock across different service phases. This clarified the mechanism behind the observed non‐uniform, large‐scale deformation; (3) A flexible support technology was designed and tested on‐site, utilizing flexible anchor cables capable of withstanding substantial deformations without fracturing. Field test results confirmed that these cables provide continuous support resistance, effectively maintaining the stability and integrity of the surrounding rock. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20500505 |
| DOI: | 10.1002/ese3.70406 |
