Experimental study of sandstone crack propagation behavior under different seepage pressures
To study the characteristics of sandstone crack propagation under hydraulic coupling, sandstone laboratory tests were conducted under different seepage pressures and confining pressures. Under the same effective confining pressure, it is shown that the rock brittleness index becomes higher as the se...
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| Format: | Article |
| Language: | English |
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SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2022-04-01
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| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5667 |
| _version_ | 1818207209873473536 |
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| author | ZHANG Li-ming WANG Zai-quan ZHAO Tian-yang CONG Yu |
| author_facet | ZHANG Li-ming WANG Zai-quan ZHAO Tian-yang CONG Yu |
| author_sort | ZHANG Li-ming |
| collection | DOAJ |
| description | To study the characteristics of sandstone crack propagation under hydraulic coupling, sandstone laboratory tests were conducted under different seepage pressures and confining pressures. Under the same effective confining pressure, it is shown that the rock brittleness index becomes higher as the seepage pressure increases, while the crack initiation stress, the crack damage stress, and the peak stress decrease gradually. The initial volumetric strain of the crack decreases, and the volumetric strain of crack propagation decreases firstly and then increases afterward. The growth rate of the crack axial strain and the crack circumferential strain are both increasing that corresponding to the damage stress and the peak stress, however, no obvious relation is observed between the growth rate of the crack volume strain and the seepage pressure. Under the same seepage pressure, the initiation stress, damage stress, and peak stress gradually increase as the effective confining pressure increases. In addition, the growth rates of the crack axial strain, circumferential strain and volumetric strain increase gradually during deformation that corresponds to the crack initiation stress, damage stress and peak stress, respectively. When comparing the different growth rates of crack strain for a tested sandstone specimen, it is found that the strain growth rates have the following order: the crack axial strain > the crack circumferential strain > the crack volume strain. |
| first_indexed | 2024-12-12T04:25:17Z |
| format | Article |
| id | doaj.art-e9dc6b28f5d94d56aa71d4b4b85315f0 |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-12-12T04:25:17Z |
| publishDate | 2022-04-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-e9dc6b28f5d94d56aa71d4b4b85315f02022-12-22T00:38:13ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982022-04-0143490190810.16285/j.rsm.2021.5667Experimental study of sandstone crack propagation behavior under different seepage pressuresZHANG Li-ming0WANG Zai-quan1ZHAO Tian-yang2CONG Yu31. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China 2. Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao, Shandong 266033, China1. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China 2. Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaSchool of Science, Qingdao University of Technology, Qingdao, Shandong 266033, China1. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China 2. Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao, Shandong 266033, ChinaTo study the characteristics of sandstone crack propagation under hydraulic coupling, sandstone laboratory tests were conducted under different seepage pressures and confining pressures. Under the same effective confining pressure, it is shown that the rock brittleness index becomes higher as the seepage pressure increases, while the crack initiation stress, the crack damage stress, and the peak stress decrease gradually. The initial volumetric strain of the crack decreases, and the volumetric strain of crack propagation decreases firstly and then increases afterward. The growth rate of the crack axial strain and the crack circumferential strain are both increasing that corresponding to the damage stress and the peak stress, however, no obvious relation is observed between the growth rate of the crack volume strain and the seepage pressure. Under the same seepage pressure, the initiation stress, damage stress, and peak stress gradually increase as the effective confining pressure increases. In addition, the growth rates of the crack axial strain, circumferential strain and volumetric strain increase gradually during deformation that corresponds to the crack initiation stress, damage stress and peak stress, respectively. When comparing the different growth rates of crack strain for a tested sandstone specimen, it is found that the strain growth rates have the following order: the crack axial strain > the crack circumferential strain > the crack volume strain.http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5667hydraulic couplingcharacteristic stress levelcrack growth rate |
| spellingShingle | ZHANG Li-ming WANG Zai-quan ZHAO Tian-yang CONG Yu Experimental study of sandstone crack propagation behavior under different seepage pressures Rock and Soil Mechanics hydraulic coupling characteristic stress level crack growth rate |
| title | Experimental study of sandstone crack propagation behavior under different seepage pressures |
| title_full | Experimental study of sandstone crack propagation behavior under different seepage pressures |
| title_fullStr | Experimental study of sandstone crack propagation behavior under different seepage pressures |
| title_full_unstemmed | Experimental study of sandstone crack propagation behavior under different seepage pressures |
| title_short | Experimental study of sandstone crack propagation behavior under different seepage pressures |
| title_sort | experimental study of sandstone crack propagation behavior under different seepage pressures |
| topic | hydraulic coupling characteristic stress level crack growth rate |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2021.5667 |
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