Study on in-situ mechanical response and energy evolution law of water-immersed mudstone
To investigate the mechanical properties and energy evolution mechanism of water-immersed mudstone under complex in-situ stress conditions, we selected the floor mudstone in Yitang Coal Mine as the research object and conducted triaxial compression tests under different immersion time and confining...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Safety in Coal Mines
2024-12-01
|
| Series: | Meikuang Anquan |
| Subjects: | |
| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231223 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846118864590471168 |
|---|---|
| author | Chenhong PAN Xiaoqiang ZHANG Yulong JIANG Kai WANG Jian HOU Jixin CHEN Wenwei WANG |
| author_facet | Chenhong PAN Xiaoqiang ZHANG Yulong JIANG Kai WANG Jian HOU Jixin CHEN Wenwei WANG |
| author_sort | Chenhong PAN |
| collection | DOAJ |
| description | To investigate the mechanical properties and energy evolution mechanism of water-immersed mudstone under complex in-situ stress conditions, we selected the floor mudstone in Yitang Coal Mine as the research object and conducted triaxial compression tests under different immersion time and confining pressure conditions. The experimental results show that water immersion significantly degrades the peak strength and elastic modulus of the mudstone, and this degradation exhibits apparent time-dependent effects. With increasing immersion time, the stress-strain curve of the mudstone specimen transitions from an “elastic-plastic” to an “elastic-plastic-creep” behavior, and the confining pressure effect on the mudstone is weakened to some extent by water immersion; with increasing confining pressure, the elastic energy, dissipated energy, and total energy of the specimens all decrease; however, the proportion of dissipated energy increases and is positively correlated with plastic failure. The weakening effect of water on the mudstone diminishes with increasing confining pressure; with the increasing of immersion time, the failure mode of the specimen changes from shear failure to predominantly plastic failure characterized by radial swelling; with increasing confining pressure, the failure mode shifts from single shear surface failure to conjugate shear surface failure with higher dissipated energy. |
| format | Article |
| id | doaj-art-19f1fcb1ae8b49ccb2d6526e1e56e4a5 |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-19f1fcb1ae8b49ccb2d6526e1e56e4a52024-12-17T08:29:18ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2024-12-01551219720510.13347/j.cnki.mkaq.20231223gMKAQ20231223Study on in-situ mechanical response and energy evolution law of water-immersed mudstoneChenhong PAN0Xiaoqiang ZHANG1Yulong JIANG2Kai WANG3Jian HOU4Jixin CHEN5Wenwei WANG6College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaTo investigate the mechanical properties and energy evolution mechanism of water-immersed mudstone under complex in-situ stress conditions, we selected the floor mudstone in Yitang Coal Mine as the research object and conducted triaxial compression tests under different immersion time and confining pressure conditions. The experimental results show that water immersion significantly degrades the peak strength and elastic modulus of the mudstone, and this degradation exhibits apparent time-dependent effects. With increasing immersion time, the stress-strain curve of the mudstone specimen transitions from an “elastic-plastic” to an “elastic-plastic-creep” behavior, and the confining pressure effect on the mudstone is weakened to some extent by water immersion; with increasing confining pressure, the elastic energy, dissipated energy, and total energy of the specimens all decrease; however, the proportion of dissipated energy increases and is positively correlated with plastic failure. The weakening effect of water on the mudstone diminishes with increasing confining pressure; with the increasing of immersion time, the failure mode of the specimen changes from shear failure to predominantly plastic failure characterized by radial swelling; with increasing confining pressure, the failure mode shifts from single shear surface failure to conjugate shear surface failure with higher dissipated energy.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231223mine water inrush disasterwater-induced weakeningmechanical responseenergy evolutionmudstone |
| spellingShingle | Chenhong PAN Xiaoqiang ZHANG Yulong JIANG Kai WANG Jian HOU Jixin CHEN Wenwei WANG Study on in-situ mechanical response and energy evolution law of water-immersed mudstone Meikuang Anquan mine water inrush disaster water-induced weakening mechanical response energy evolution mudstone |
| title | Study on in-situ mechanical response and energy evolution law of water-immersed mudstone |
| title_full | Study on in-situ mechanical response and energy evolution law of water-immersed mudstone |
| title_fullStr | Study on in-situ mechanical response and energy evolution law of water-immersed mudstone |
| title_full_unstemmed | Study on in-situ mechanical response and energy evolution law of water-immersed mudstone |
| title_short | Study on in-situ mechanical response and energy evolution law of water-immersed mudstone |
| title_sort | study on in situ mechanical response and energy evolution law of water immersed mudstone |
| topic | mine water inrush disaster water-induced weakening mechanical response energy evolution mudstone |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231223 |
| work_keys_str_mv | AT chenhongpan studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT xiaoqiangzhang studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT yulongjiang studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT kaiwang studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT jianhou studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT jixinchen studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone AT wenweiwang studyoninsitumechanicalresponseandenergyevolutionlawofwaterimmersedmudstone |