Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates
Abstract To explore the strain rate effect of deformation and failure of impact prone coal rock, uniaxial compression tests and triaxial compression tests with different strain rates were carried out. The mechanical properties and impact tendency of impact-prone coal rock were studied, and the energ...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-08-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-41094-5 |
| _version_ | 1797576969738518528 |
|---|---|
| author | Kun Zhang Yichen Zhang Sen Zhang Jianxi Ren Liang Zhang Renjie Zhang Yuanquan Cui |
| author_facet | Kun Zhang Yichen Zhang Sen Zhang Jianxi Ren Liang Zhang Renjie Zhang Yuanquan Cui |
| author_sort | Kun Zhang |
| collection | DOAJ |
| description | Abstract To explore the strain rate effect of deformation and failure of impact prone coal rock, uniaxial compression tests and triaxial compression tests with different strain rates were carried out. The mechanical properties and impact tendency of impact-prone coal rock were studied, and the energy evolution law and pre-peak energy self-promotion-inhibition mechanism of impact-prone coal rock were obtained. The results show that with the increase of strain rate, the peak strength of coal rock under uniaxial compression decreases gradually, and the peak strength of coal rock under triaxial compression increases first and then decreases, and the impact tendency of coal rock increases first and then decreases. The energy evolution of coal rock under uniaxial compression is mainly divided into four stages: initial energy damage, energy hardening, energy softening and failure. With the increase of strain rate, the total energy and elasticity at the peak point of coal rock under uniaxial compression decrease gradually, and the total energy, elastic energy and dissipation energy at the peak point under triaxial compression increase first and then decrease. The elastic energy promotion coefficient of impact-prone coal rock is much larger than the inhibition coefficient, and the increase of strain rate will promote the generation of elastic energy inside coal rock. The research results can provide reference for the prevention and early warning of dynamic disasters of coal and rock mass with impact tendency. |
| first_indexed | 2024-03-10T22:02:12Z |
| format | Article |
| id | doaj.art-4526a507df674a5eb2b9620ff551ad29 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-10T22:02:12Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-4526a507df674a5eb2b9620ff551ad292023-11-19T12:55:41ZengNature PortfolioScientific Reports2045-23222023-08-0113111210.1038/s41598-023-41094-5Study on the energy evolution mechanism of coal and rock with impact tendency under different strain ratesKun Zhang0Yichen Zhang1Sen Zhang2Jianxi Ren3Liang Zhang4Renjie Zhang5Yuanquan Cui6School of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologySchool of Architecture and Civil Engineering, Xi’an University of Science and TechnologyAbstract To explore the strain rate effect of deformation and failure of impact prone coal rock, uniaxial compression tests and triaxial compression tests with different strain rates were carried out. The mechanical properties and impact tendency of impact-prone coal rock were studied, and the energy evolution law and pre-peak energy self-promotion-inhibition mechanism of impact-prone coal rock were obtained. The results show that with the increase of strain rate, the peak strength of coal rock under uniaxial compression decreases gradually, and the peak strength of coal rock under triaxial compression increases first and then decreases, and the impact tendency of coal rock increases first and then decreases. The energy evolution of coal rock under uniaxial compression is mainly divided into four stages: initial energy damage, energy hardening, energy softening and failure. With the increase of strain rate, the total energy and elasticity at the peak point of coal rock under uniaxial compression decrease gradually, and the total energy, elastic energy and dissipation energy at the peak point under triaxial compression increase first and then decrease. The elastic energy promotion coefficient of impact-prone coal rock is much larger than the inhibition coefficient, and the increase of strain rate will promote the generation of elastic energy inside coal rock. The research results can provide reference for the prevention and early warning of dynamic disasters of coal and rock mass with impact tendency.https://doi.org/10.1038/s41598-023-41094-5 |
| spellingShingle | Kun Zhang Yichen Zhang Sen Zhang Jianxi Ren Liang Zhang Renjie Zhang Yuanquan Cui Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates Scientific Reports |
| title | Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| title_full | Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| title_fullStr | Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| title_full_unstemmed | Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| title_short | Study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| title_sort | study on the energy evolution mechanism of coal and rock with impact tendency under different strain rates |
| url | https://doi.org/10.1038/s41598-023-41094-5 |
| work_keys_str_mv | AT kunzhang studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT yichenzhang studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT senzhang studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT jianxiren studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT liangzhang studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT renjiezhang studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates AT yuanquancui studyontheenergyevolutionmechanismofcoalandrockwithimpacttendencyunderdifferentstrainrates |