Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances
Abstract Coal burst is a serious hazard in deep coal mining. To investigate the coal burst proneness evolution during multiple mining disturbances (MMD), this paper implemented a range of uniaxial cyclic loading–unloading tests coupled with acoustic emission (AE) measurement to simulate the loading–...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-10-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.1546 |
| _version_ | 1797644620413272064 |
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| author | Yang Liu Zhenhua Ouyang Haiyang Yi Hongyan Qin Gen Li Fengfei Ren Jiajia Wang Zheng Chen |
| author_facet | Yang Liu Zhenhua Ouyang Haiyang Yi Hongyan Qin Gen Li Fengfei Ren Jiajia Wang Zheng Chen |
| author_sort | Yang Liu |
| collection | DOAJ |
| description | Abstract Coal burst is a serious hazard in deep coal mining. To investigate the coal burst proneness evolution during multiple mining disturbances (MMD), this paper implemented a range of uniaxial cyclic loading–unloading tests coupled with acoustic emission (AE) measurement to simulate the loading–unloading effects of the MMD. The maximum load was used to simulate the highest load that the coal has endured in history, the loading–unloading rate was used to simulate the mining speed, and the loading–unloading cycles were used to simulate the number of mining disturbances. Finally, the burst proneness indexes of the damaged coal sample are measured and compared with the origin coal sample. Analysis on the experiment results suggest that, the burst proneness increases when the maximum load is 30% of the uniaxial compressive strength (UCS), interestingly, when the low loading–unloading rate is applied, 50% of the UCS enlarge the burst proneness as well. However, it decreases when the maximum load is 70% of the UCS. Sensitivity analysis indicates that the maximum load, loading–unloading rate, and loading–unloading cycles exhibit decreasing influence sensitivity to the elastic modulus, as well as to the UCS and duration of dynamic fracture. Similarly, the influence sensitivity of maximum load, loading–unloading cycles, and loading–unloading rate to the elastic strain energy index decreases, as well as to the bursting energy index. To ensure the safety of coal mining, it is crucial to avoid the disturbances that would put the coal under low loading and low loading rate. |
| first_indexed | 2024-03-11T14:33:50Z |
| format | Article |
| id | doaj.art-f210b029a4934d0eb4613133c9b42e4c |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-11T14:33:50Z |
| publishDate | 2023-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-f210b029a4934d0eb4613133c9b42e4c2023-10-31T06:46:03ZengWileyEnergy Science & Engineering2050-05052023-10-0111103680369810.1002/ese3.1546Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbancesYang Liu0Zhenhua Ouyang1Haiyang Yi2Hongyan Qin3Gen Li4Fengfei Ren5Jiajia Wang6Zheng Chen7School of Mechanics and Engineering Liaoning Technical University Fuxin ChinaSchool of Mechanics and Engineering Liaoning Technical University Fuxin ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaSchool of Mine Safety North China Institute of Science and Technology Langfang ChinaAbstract Coal burst is a serious hazard in deep coal mining. To investigate the coal burst proneness evolution during multiple mining disturbances (MMD), this paper implemented a range of uniaxial cyclic loading–unloading tests coupled with acoustic emission (AE) measurement to simulate the loading–unloading effects of the MMD. The maximum load was used to simulate the highest load that the coal has endured in history, the loading–unloading rate was used to simulate the mining speed, and the loading–unloading cycles were used to simulate the number of mining disturbances. Finally, the burst proneness indexes of the damaged coal sample are measured and compared with the origin coal sample. Analysis on the experiment results suggest that, the burst proneness increases when the maximum load is 30% of the uniaxial compressive strength (UCS), interestingly, when the low loading–unloading rate is applied, 50% of the UCS enlarge the burst proneness as well. However, it decreases when the maximum load is 70% of the UCS. Sensitivity analysis indicates that the maximum load, loading–unloading rate, and loading–unloading cycles exhibit decreasing influence sensitivity to the elastic modulus, as well as to the UCS and duration of dynamic fracture. Similarly, the influence sensitivity of maximum load, loading–unloading cycles, and loading–unloading rate to the elastic strain energy index decreases, as well as to the bursting energy index. To ensure the safety of coal mining, it is crucial to avoid the disturbances that would put the coal under low loading and low loading rate.https://doi.org/10.1002/ese3.1546acoustic emissionburst pronenessloading–unloading effectsmultiple mining disturbancessensitivity analysis |
| spellingShingle | Yang Liu Zhenhua Ouyang Haiyang Yi Hongyan Qin Gen Li Fengfei Ren Jiajia Wang Zheng Chen Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances Energy Science & Engineering acoustic emission burst proneness loading–unloading effects multiple mining disturbances sensitivity analysis |
| title | Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| title_full | Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| title_fullStr | Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| title_full_unstemmed | Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| title_short | Study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| title_sort | study on the evolutionary characteristics of coal burst proneness under the action of multiple mining disturbances |
| topic | acoustic emission burst proneness loading–unloading effects multiple mining disturbances sensitivity analysis |
| url | https://doi.org/10.1002/ese3.1546 |
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