Effects of seepage pressure on the mechanical behaviors and microstructure of sandstone
文献类型：期刊论文
| 作者 | Liu, Xuewei1; Chen, Juxiang1,2; Liu, Bin1; Wang, Sai1,2; Liu, Quansheng3; Luo, Jin2 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-06-01 |
| 卷号 | 16期号:6页码:2033-2051 |
| 关键词 | Rock mechanics Mechanical property Seepage pressure Numerical simulation Microcracks |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.09.010 |
| 英文摘要 | Surrounding rocks of underground engineering are subjected to long-term seepage pressure, which can deteriorate the mechanical properties and cause serious disasters. In order to understand the impact of seepage pressure on the mechanical property of sandstone, uniaxial compression tests, P-wave velocity measurements, and nuclear magnetic resonance (NMR) tests were conducted on saturated sandstone samples with varied seepage pressures (i.e. 0 MPa, 3 MPa, 4 MPa, 5 MPa, 6 MPa, 7 MPa). The results demonstrate that the mechanical parameters (uniaxial compressive strength, peak strain, elastic modulus, and brittleness index), total energy, elastic strain energy, as well as elastic strain energy ratio, decrease with increasing seepage pressure, while the dissipation energy and dissipation energy ratio increase. Moreover, as seepage pressure increases, the micro-pores gradually transform into meso-pores and macro-pores. This increases the cumulative porosity of sandstone and decreases P-wave velocity. The numerical results indicate that as seepage pressure rises, the number of tensile cracks increases progressively, the angle range of microcracks is basically from 50 degrees-120 degrees to 80 degrees-100 degrees, and as a result, the failure mode transforms to the tensile-shear mixed failure mode. Finally, the effects of seepage pressure on mechanical properties were discussed. The results show that decrease in the effective stress and cohesion under the action of seepage pressure could lead to deterioration of strength behaviors of sandstone. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foun-dation of China[U22A20234] ; National Natural Science Foun-dation of China[42277170] ; Hubei Province Key Research and Development Project[2023BCB121] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001298380700001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42303]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liu, Bin |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China 3.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xuewei,Chen, Juxiang,Liu, Bin,et al. Effects of seepage pressure on the mechanical behaviors and microstructure of sandstone[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(6):2033-2051. |
| APA | Liu, Xuewei,Chen, Juxiang,Liu, Bin,Wang, Sai,Liu, Quansheng,&Luo, Jin.(2024).Effects of seepage pressure on the mechanical behaviors and microstructure of sandstone.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(6),2033-2051. |
| MLA | Liu, Xuewei,et al."Effects of seepage pressure on the mechanical behaviors and microstructure of sandstone".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.6(2024):2033-2051. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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