Microstructural and thermal properties of coal measure sandstone subjected to high temperatures
文献类型：期刊论文
| 作者 | Xiao, Weijing1,2; Zhang, Dongming2; Li, Shujian2,3,4; Wu, Mingyang2,5 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 16期号:8页码:2909-2921 |
| 关键词 | Rock mechanics Coal measure sandstone Micromorphology Thermal damage |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.11.007 |
| 英文摘要 | To study the microscopic structure, thermal and mechanical properties of sandstones under the influence of temperature, coal measure sandstones from Southwest China are adopted as the research object to carry out high-temperature tests at 25 degrees C-1000 degrees C. The microscopic images of sandstone after thermal treatment are obtained by means of polarizing microscopy and scanning electron microscopy (SEM). Based on thermogravimetric (TG) analysis and differential scanning calorimetric (DSC) analysis, the model function of coal measure sandstone is explored through thermal analysis kinetics (TAK) theory, and the kinetic parameters of thermal decomposition and the thermal decomposition reaction rate of rock are studied. Through the uniaxial compression experiments, the stress-strain curves and strength characteristics of sandstone under the influence of temperature are obtained. The results show that the temperature has a significant effect on the microstructure, mineral composition and mechanical properties of sandstone. In particular, when the temperature exceeds 400 degrees C, the thermal fracture phenomenon of rock is obvious, the activity of activated molecules is significantly enhanced, and the kinetic phenomenon of the thermal decomposition reaction of rock appears rapidly. The mechanical properties of rock are weakened under the influence of rock thermal fracture and mineral thermal decomposition. These research results can provide a reference for the analysis of surrounding rock stability and the control of disasters caused by thermal damage in areas such as underground coal gasification (UCG) channels and rock masses subjected to mine fires. (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 | Scientific Research Foundation of State Key Laboratory of Coal Mine Disaster Dynamics and Control[2011DA105287-zd201804] ; Jiangxi Provincial Nat-ural Science Foundation of China[20232BAB214036] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001297847300001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42321]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Dongming |
| 作者单位 | 1.East China Jiaotong Univ, Sch Civil Engn & Architecture, Nanchang 330013, Peoples R China 2.Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China 3.Yunnan Phosphate Chem Grp Co Ltd, Kunming 650600, Peoples R China 4.Natl Engn & Technol Res Ctr Dev & Utilizat Phospha, Kunming 650600, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Weijing,Zhang, Dongming,Li, Shujian,et al. Microstructural and thermal properties of coal measure sandstone subjected to high temperatures[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(8):2909-2921. |
| APA | Xiao, Weijing,Zhang, Dongming,Li, Shujian,&Wu, Mingyang.(2024).Microstructural and thermal properties of coal measure sandstone subjected to high temperatures.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(8),2909-2921. |
| MLA | Xiao, Weijing,et al."Microstructural and thermal properties of coal measure sandstone subjected to high temperatures".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.8(2024):2909-2921. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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