Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition
Abstract To gain insight into the reduction mechanism of water on the dynamic destabilization failure character of coal under mining disturbance conditions, the effect of water on the damage and energy dissipation feature of coal was investigated via cyclic uniaxial compressive loading–unloading tes...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-11-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.1565 |
| _version_ | 1797628315845001216 |
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| author | Honghua Song Yixin Zhao Yang Wu Xuehao Li Zhixin Gong Zhuang Sun Yaodong Jiang Zihan Guo |
| author_facet | Honghua Song Yixin Zhao Yang Wu Xuehao Li Zhixin Gong Zhuang Sun Yaodong Jiang Zihan Guo |
| author_sort | Honghua Song |
| collection | DOAJ |
| description | Abstract To gain insight into the reduction mechanism of water on the dynamic destabilization failure character of coal under mining disturbance conditions, the effect of water on the damage and energy dissipation feature of coal was investigated via cyclic uniaxial compressive loading–unloading test, acoustic emission (AE) monitoring technology, and theoretical analysis. It manifests that the softening effect of water on the mechanical properties of coal is still remarkable, lower uniaxial compressive strength and elastic modulus, while greater axial strain and higher Poisson's ratio are observed under the cyclic loading–unloading condition. Water‐saturated specimens dissipate more energy during the cyclic loading–unloading process, which reduces the proportion of input energy accumulated in the coal mass, thus lowering the burst proneness of coal. A greater amount of damage generates in air‐dried specimens than that in water‐saturated specimens at the first cyclic loading–unloading cycle, while lower damage increments are observed in the following cycles. This may be the reason for the minimal energy dissipation of air‐dried specimens in the following cycles. The elastic modulus behaves logarithmically versus the increasing cyclic loading–unloading cycle counts. The energy dissipated due to the damage evolution and plastic deformation of coal specimens positively correlates with the energy released by AE activities, the AE energy in air‐dried specimens has a greater concentration around the peak axial stress and a stronger correlation with the dissipated energy. The cumulative AE energy and energy dissipation density are linearly correlated during the cyclic loading–unloading process, which indicates a possibility in estimating the damage evolution and the dynamic failure risk of coal via cumulative AE energy, under the cyclic loading–unloading condition. |
| first_indexed | 2024-03-11T10:36:35Z |
| format | Article |
| id | doaj.art-830150a449ab45efb1952fd2c33b124e |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-11T10:36:35Z |
| publishDate | 2023-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-830150a449ab45efb1952fd2c33b124e2023-11-14T10:35:15ZengWileyEnergy Science & Engineering2050-05052023-11-0111114092410710.1002/ese3.1565Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading conditionHonghua Song0Yixin Zhao1Yang Wu2Xuehao Li3Zhixin Gong4Zhuang Sun5Yaodong Jiang6Zihan Guo7School of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaSchool of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaBasic Research and Development Center State Key Laboratory of Water Resource Protection and Utilization in Coal Mining Beijing ChinaSchool of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaSchool of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaSchool of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaSchool of Mechanics and Civil Engineering China University of Mining and Technology Beijing ChinaSchool of Energy and Mining Engineering China University of Mining and Technology Beijing ChinaAbstract To gain insight into the reduction mechanism of water on the dynamic destabilization failure character of coal under mining disturbance conditions, the effect of water on the damage and energy dissipation feature of coal was investigated via cyclic uniaxial compressive loading–unloading test, acoustic emission (AE) monitoring technology, and theoretical analysis. It manifests that the softening effect of water on the mechanical properties of coal is still remarkable, lower uniaxial compressive strength and elastic modulus, while greater axial strain and higher Poisson's ratio are observed under the cyclic loading–unloading condition. Water‐saturated specimens dissipate more energy during the cyclic loading–unloading process, which reduces the proportion of input energy accumulated in the coal mass, thus lowering the burst proneness of coal. A greater amount of damage generates in air‐dried specimens than that in water‐saturated specimens at the first cyclic loading–unloading cycle, while lower damage increments are observed in the following cycles. This may be the reason for the minimal energy dissipation of air‐dried specimens in the following cycles. The elastic modulus behaves logarithmically versus the increasing cyclic loading–unloading cycle counts. The energy dissipated due to the damage evolution and plastic deformation of coal specimens positively correlates with the energy released by AE activities, the AE energy in air‐dried specimens has a greater concentration around the peak axial stress and a stronger correlation with the dissipated energy. The cumulative AE energy and energy dissipation density are linearly correlated during the cyclic loading–unloading process, which indicates a possibility in estimating the damage evolution and the dynamic failure risk of coal via cumulative AE energy, under the cyclic loading–unloading condition.https://doi.org/10.1002/ese3.1565AEcoalcyclic loading–unloadingenergy dissipationwater |
| spellingShingle | Honghua Song Yixin Zhao Yang Wu Xuehao Li Zhixin Gong Zhuang Sun Yaodong Jiang Zihan Guo Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition Energy Science & Engineering AE coal cyclic loading–unloading energy dissipation water |
| title | Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition |
| title_full | Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition |
| title_fullStr | Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition |
| title_full_unstemmed | Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition |
| title_short | Effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading–unloading condition |
| title_sort | effect of water on the damage and energy dissipation feature of coal under uniaxial cyclic loading unloading condition |
| topic | AE coal cyclic loading–unloading energy dissipation water |
| url | https://doi.org/10.1002/ese3.1565 |
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