Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression
This paper presents a new method to identify the stress concentration degree and stress distribution characteristics in front of working face in coal mine, based on the close relationship between charge and stress during fracture of coal mass. This method overcomes many disadvantages of conventional...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/9412697 |
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| _version_ | 1849305895036518400 |
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| author | Gang Wang Yishan Pan Xiaochun Xiao Di Wu Hongrui Zhao Aiwen Wang Xin Ding |
| author_facet | Gang Wang Yishan Pan Xiaochun Xiao Di Wu Hongrui Zhao Aiwen Wang Xin Ding |
| author_sort | Gang Wang |
| collection | DOAJ |
| description | This paper presents a new method to identify the stress concentration degree and stress distribution characteristics in front of working face in coal mine, based on the close relationship between charge and stress during fracture of coal mass. This method overcomes many disadvantages of conventional stress-monitored methods. First, the stress and charge relationship of coal mass was established through damage theory and statistical strength theory. Then, the relationship between stress and charge was studied by a laboratory test, and finally, the field charge monitoring test was performed. The results show that there is a nonlinear relationship between loading stress (σ) and cumulative charge (Q), which can be represented by polynomials. The fitting results of the laboratory test between σ and Q conform to a cubic polynomial function, Q=aσ3+bσ2+cσ+d. It verifies the rationality of the theoretical relationship formula. The field monitoring results show that average charge is great and cumulative charge changes from rapid upward to sharp upward before roof falling. The magnitude and position of average charge and the upward trend of cumulative charge can be used to identify the stress concentration and stress distribution in front of working face, and the abnormal stress area can be predicted. The results can provide certain guidance for the forecast of rock burst in coal mine. |
| format | Article |
| id | doaj-art-3532d8c54a294fe69e1ae98c4d8b459c |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-3532d8c54a294fe69e1ae98c4d8b459c2025-08-20T03:55:16ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/94126979412697Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial CompressionGang Wang0Yishan Pan1Xiaochun Xiao2Di Wu3Hongrui Zhao4Aiwen Wang5Xin Ding6School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaCoal Science and Technology Group Shenyang Research Institute, Shenyang 110015, ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, ChinaThis paper presents a new method to identify the stress concentration degree and stress distribution characteristics in front of working face in coal mine, based on the close relationship between charge and stress during fracture of coal mass. This method overcomes many disadvantages of conventional stress-monitored methods. First, the stress and charge relationship of coal mass was established through damage theory and statistical strength theory. Then, the relationship between stress and charge was studied by a laboratory test, and finally, the field charge monitoring test was performed. The results show that there is a nonlinear relationship between loading stress (σ) and cumulative charge (Q), which can be represented by polynomials. The fitting results of the laboratory test between σ and Q conform to a cubic polynomial function, Q=aσ3+bσ2+cσ+d. It verifies the rationality of the theoretical relationship formula. The field monitoring results show that average charge is great and cumulative charge changes from rapid upward to sharp upward before roof falling. The magnitude and position of average charge and the upward trend of cumulative charge can be used to identify the stress concentration and stress distribution in front of working face, and the abnormal stress area can be predicted. The results can provide certain guidance for the forecast of rock burst in coal mine.http://dx.doi.org/10.1155/2019/9412697 |
| spellingShingle | Gang Wang Yishan Pan Xiaochun Xiao Di Wu Hongrui Zhao Aiwen Wang Xin Ding Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression Shock and Vibration |
| title | Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression |
| title_full | Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression |
| title_fullStr | Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression |
| title_full_unstemmed | Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression |
| title_short | Study on the Relationship between Stress and Charge of Coal Mass under Uniaxial Compression |
| title_sort | study on the relationship between stress and charge of coal mass under uniaxial compression |
| url | http://dx.doi.org/10.1155/2019/9412697 |
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