Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone
Abstract Mudstone has peculiar structural properties, which have a significant impact on its strength, deformation, and other characteristics. However, there are few reports on the impact of structural properties on its yield characteristics. For the structural properties of hydrous mudstone on the...
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Nature Portfolio
2025-02-01
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| Online Access: | https://doi.org/10.1038/s41598-025-88047-8 |
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| author | Yun Xu Minmin Li Guofu Li Liangliang Liu Gaowei Yue |
| author_facet | Yun Xu Minmin Li Guofu Li Liangliang Liu Gaowei Yue |
| author_sort | Yun Xu |
| collection | DOAJ |
| description | Abstract Mudstone has peculiar structural properties, which have a significant impact on its strength, deformation, and other characteristics. However, there are few reports on the impact of structural properties on its yield characteristics. For the structural properties of hydrous mudstone on the yield characteristics during isotropic loading, a multifunctional triaxial apparatus was used as a research tool to conduct isotropic loading tests on four types of hydrous mudstone samples. With CT (computerized tomography) technology, the real-time dynamic scanning of mudstone samples is carried out after deformation stabilization, and the macroscopic mechanical indicators are connected with the microscopic scanning data to clarify the structural evolution law of mudstone during the loading process. The results indicate that based on the CT number (Me) reflecting the density of coal in different regions, the variation law of coal structure in resisting external loads during the loading process was explained. Before yielding, the CT number Me increases slowly, but after yielding, Me shows a linear and rapid growth trend. The change of Me values also clearly reflects the yield behavior and structural damage evolution law of mudstone loaded with different water contents. The smaller the moisture content of the mudstone sample, the greater the stress at the mudstone yields, and the structural influence of mudstone on its mechanical deformation characteristics is relatively small, but it has a strong effect on resisting external loads. The research results can provide reference for further establishing structural constitutive models of hydrous mudstone. |
| format | Article |
| id | doaj-art-1925ed1a4f7e4cef8ad57cd6d797a294 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-1925ed1a4f7e4cef8ad57cd6d797a2942025-02-09T12:32:48ZengNature PortfolioScientific Reports2045-23222025-02-0115111610.1038/s41598-025-88047-8Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstoneYun Xu0Minmin Li1Guofu Li2Liangliang Liu3Gaowei Yue4State Key Laboratory of Coal and Coalbed Methane Co miningSchool of Civil Engineering, Henan Polytechnic UniversityState Key Laboratory of Coal and Coalbed Methane Co miningState Key Laboratory of Coal and Coalbed Methane Co miningSchool of Civil Engineering, Henan Polytechnic UniversityAbstract Mudstone has peculiar structural properties, which have a significant impact on its strength, deformation, and other characteristics. However, there are few reports on the impact of structural properties on its yield characteristics. For the structural properties of hydrous mudstone on the yield characteristics during isotropic loading, a multifunctional triaxial apparatus was used as a research tool to conduct isotropic loading tests on four types of hydrous mudstone samples. With CT (computerized tomography) technology, the real-time dynamic scanning of mudstone samples is carried out after deformation stabilization, and the macroscopic mechanical indicators are connected with the microscopic scanning data to clarify the structural evolution law of mudstone during the loading process. The results indicate that based on the CT number (Me) reflecting the density of coal in different regions, the variation law of coal structure in resisting external loads during the loading process was explained. Before yielding, the CT number Me increases slowly, but after yielding, Me shows a linear and rapid growth trend. The change of Me values also clearly reflects the yield behavior and structural damage evolution law of mudstone loaded with different water contents. The smaller the moisture content of the mudstone sample, the greater the stress at the mudstone yields, and the structural influence of mudstone on its mechanical deformation characteristics is relatively small, but it has a strong effect on resisting external loads. The research results can provide reference for further establishing structural constitutive models of hydrous mudstone.https://doi.org/10.1038/s41598-025-88047-8Coal measure mudstoneMechanical propertiesStructural propertiesMoisture contentCT scanningIsotropic loading |
| spellingShingle | Yun Xu Minmin Li Guofu Li Liangliang Liu Gaowei Yue Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone Scientific Reports Coal measure mudstone Mechanical properties Structural properties Moisture content CT scanning Isotropic loading |
| title | Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone |
| title_full | Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone |
| title_fullStr | Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone |
| title_full_unstemmed | Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone |
| title_short | Dynamic evolution characteristics of meso-structural mechanics performance of coal measure mudstone |
| title_sort | dynamic evolution characteristics of meso structural mechanics performance of coal measure mudstone |
| topic | Coal measure mudstone Mechanical properties Structural properties Moisture content CT scanning Isotropic loading |
| url | https://doi.org/10.1038/s41598-025-88047-8 |
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