Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure
Abstract The influence of interface morphology is of great importance on the shear behavior of the cement mortar-coal composite structure (CCCS) widely distributed in underground mines. In the present research, both the macroscopic- and microscopic failure characteristics of the CCCS with variable i...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-87068-7 |
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| author | Xianxia Wang Xudong Shi Jinwen Bai Hongchao Zhao Yantong Zhao |
| author_facet | Xianxia Wang Xudong Shi Jinwen Bai Hongchao Zhao Yantong Zhao |
| author_sort | Xianxia Wang |
| collection | DOAJ |
| description | Abstract The influence of interface morphology is of great importance on the shear behavior of the cement mortar-coal composite structure (CCCS) widely distributed in underground mines. In the present research, both the macroscopic- and microscopic failure characteristics of the CCCS with variable interface sawtooth angles (i.e., 0°, 15°, 30°, 45°, 60°, 75°) were experimentally and numerically investigated. The results showed that both the shear strength and displacement of tested specimen increased with the increase of the interface sawtooth angle. The peak stress is 5.42 MPa at a sawtooth angle of 75°, which is 1.369 times that of the specimen with a sawtooth angle of 0°. The typical failure modes of tested specimens can be classified into three categories: the climbing failure, the cutting failure, and the sliding failure. As the interface sawtooth angle increases, the climbing damage changes to cutting damage. The increase in sawtooth angle prolonged the duration of stress concentration in the sample. And the sawtooth angle changed the stress distribution of the sample, resulting in a different final failure pattern as well as a different residual strength. This study is expected to provide theoretical guidance for the prevention and control of shear instability in CCCS. |
| format | Article |
| id | doaj-art-a8a5c0b93592486cae49921038b2c791 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-a8a5c0b93592486cae49921038b2c7912025-02-02T12:21:52ZengNature PortfolioScientific Reports2045-23222025-01-0115112010.1038/s41598-025-87068-7Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structureXianxia Wang0Xudong Shi1Jinwen Bai2Hongchao Zhao3Yantong Zhao4College of Mathematics, Taiyuan University of TechnologyCollege of Mining Engineering, Taiyuan University of TechnologyCollege of Mining Engineering, Taiyuan University of TechnologySchool of Geology and Mining Engineering, Xinjiang UniversityCollege of Mining Engineering, Taiyuan University of TechnologyAbstract The influence of interface morphology is of great importance on the shear behavior of the cement mortar-coal composite structure (CCCS) widely distributed in underground mines. In the present research, both the macroscopic- and microscopic failure characteristics of the CCCS with variable interface sawtooth angles (i.e., 0°, 15°, 30°, 45°, 60°, 75°) were experimentally and numerically investigated. The results showed that both the shear strength and displacement of tested specimen increased with the increase of the interface sawtooth angle. The peak stress is 5.42 MPa at a sawtooth angle of 75°, which is 1.369 times that of the specimen with a sawtooth angle of 0°. The typical failure modes of tested specimens can be classified into three categories: the climbing failure, the cutting failure, and the sliding failure. As the interface sawtooth angle increases, the climbing damage changes to cutting damage. The increase in sawtooth angle prolonged the duration of stress concentration in the sample. And the sawtooth angle changed the stress distribution of the sample, resulting in a different final failure pattern as well as a different residual strength. This study is expected to provide theoretical guidance for the prevention and control of shear instability in CCCS.https://doi.org/10.1038/s41598-025-87068-7Cement mortar-coal composite structureAcoustic emissionFailure modeShear test |
| spellingShingle | Xianxia Wang Xudong Shi Jinwen Bai Hongchao Zhao Yantong Zhao Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure Scientific Reports Cement mortar-coal composite structure Acoustic emission Failure mode Shear test |
| title | Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| title_full | Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| title_fullStr | Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| title_full_unstemmed | Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| title_short | Influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| title_sort | influence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure |
| topic | Cement mortar-coal composite structure Acoustic emission Failure mode Shear test |
| url | https://doi.org/10.1038/s41598-025-87068-7 |
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