Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams
Abstract Aiming at the effect of principal stress rotation (PSR) in gently inclined coal seam roadways, this study has established a strength criterion that comprehensively considers the coupling effects of multiple factors. Through integrated theoretical analysis, numerical simulation, and physical...
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-10237-1 |
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| author | Xianyu Xiong Wei Nie Yibo Ouyang Jun Dai Yuming Huang |
| author_facet | Xianyu Xiong Wei Nie Yibo Ouyang Jun Dai Yuming Huang |
| author_sort | Xianyu Xiong |
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| description | Abstract Aiming at the effect of principal stress rotation (PSR) in gently inclined coal seam roadways, this study has established a strength criterion that comprehensively considers the coupling effects of multiple factors. Through integrated theoretical analysis, numerical simulation, and physical model testing, this study quantifies the influence of critical parameters on support stability, encompassing principal stress deflection angle, bolt support angle, damage factor, principal stress ratio, and friction coefficient. Quantitative analysis demonstrates that parameter sensitivity exhibits the following hierarchy: damage factor > principal stress deflection angle > principal stress ratio > friction coefficient. The investigation determines optimal roof support angles of 45–55°, with diminished angle sensitivity observed under high dip conditions (ψ ≥ 60°). Digital Image Correlation (DIC) and Electro Mechanical Systems (MEMS) fiber optic sensors were utilized to monitor principal stress rotation, providing high-precision measurements of stress field evolution. This analysis reveals asymmetric PSR distribution characteristics in the roof structure, manifesting rotation angles of 84.23° and 58.45° on the left and right sides respectively. These findings facilitate the development of a regionalized differential support methodology. Field implementation validates the theoretical framework, demonstrating substantial improvements in roadway stability. |
| format | Article |
| id | doaj-art-81fc4eaedb6c458d8b35c1b9ef21d11a |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-81fc4eaedb6c458d8b35c1b9ef21d11a2025-08-20T03:05:22ZengNature PortfolioScientific Reports2045-23222025-07-0115111710.1038/s41598-025-10237-1Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seamsXianyu Xiong0Wei Nie1Yibo Ouyang2Jun Dai3Yuming Huang4School of Engineering Management and Real Estate, Henan University of Economics and LawSchool of Engineering Management and Real Estate, Henan University of Economics and LawDepartment of Hydraulic Engineering, Henan Vocational College of Water Conservancy and EnvironmentSchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Engineering Management and Real Estate, Henan University of Economics and LawAbstract Aiming at the effect of principal stress rotation (PSR) in gently inclined coal seam roadways, this study has established a strength criterion that comprehensively considers the coupling effects of multiple factors. Through integrated theoretical analysis, numerical simulation, and physical model testing, this study quantifies the influence of critical parameters on support stability, encompassing principal stress deflection angle, bolt support angle, damage factor, principal stress ratio, and friction coefficient. Quantitative analysis demonstrates that parameter sensitivity exhibits the following hierarchy: damage factor > principal stress deflection angle > principal stress ratio > friction coefficient. The investigation determines optimal roof support angles of 45–55°, with diminished angle sensitivity observed under high dip conditions (ψ ≥ 60°). Digital Image Correlation (DIC) and Electro Mechanical Systems (MEMS) fiber optic sensors were utilized to monitor principal stress rotation, providing high-precision measurements of stress field evolution. This analysis reveals asymmetric PSR distribution characteristics in the roof structure, manifesting rotation angles of 84.23° and 58.45° on the left and right sides respectively. These findings facilitate the development of a regionalized differential support methodology. Field implementation validates the theoretical framework, demonstrating substantial improvements in roadway stability.https://doi.org/10.1038/s41598-025-10237-1Gently inclined coal seamRight-angled trapezoidal roadwayPrincipal stress rotationAnchor blot angleMEMS |
| spellingShingle | Xianyu Xiong Wei Nie Yibo Ouyang Jun Dai Yuming Huang Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams Scientific Reports Gently inclined coal seam Right-angled trapezoidal roadway Principal stress rotation Anchor blot angle MEMS |
| title | Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams |
| title_full | Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams |
| title_fullStr | Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams |
| title_full_unstemmed | Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams |
| title_short | Principal stress rotation effect and multi-factor coupling support optimization in roadways of inclined coal seams |
| title_sort | principal stress rotation effect and multi factor coupling support optimization in roadways of inclined coal seams |
| topic | Gently inclined coal seam Right-angled trapezoidal roadway Principal stress rotation Anchor blot angle MEMS |
| url | https://doi.org/10.1038/s41598-025-10237-1 |
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