Influence of rock strength on the mechanical behavior and P-velocity evolution of coal-rock combination specimen
文献类型：期刊论文
| 作者 | Zhao, Tong-bin3,4; Gu, Xue-bin3,4; Guo, Wei-yao3,4; Gong, Xu-fei3,4; Xiao, Ya-xun1; Kong, Biao2,3; Zhang, Cheng-guo4 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2021-05-01 |
| 卷号 | 12页码:1113-1124 |
| 关键词 | Coal-rock combination Mechanical behavior P-velocity AE Energy |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2021.03.059 |
| 英文摘要 | To research the influence of rock strength on the mechanical behavior, AE characteristics and P-velocity evolution of coal-rock combination specimen, six kinds of combination specimens with different rock strengths are chosen to carry out the ultrasonic wave and uniaxial compression tests. During the loading process, AE signals are monitored. Then, a new method for calculating the P-velocity is given and the relationship between the P velocity and mechanical parameters of coal-rock combination body is discussed. Results show that: (1) As the rock strength of the combination specimen increases, its peak compressive strength increases first and then turns constant while its elastic modulus keeps increasing; meanwhile, the failure model transfers from combination specimen failure to coal dynamic failure. (2) AE energy rate changes from multi-peak to single-peak near the peak stress of combination specimen as increasing the rock strength, which indicates that the released energy of combination body greatly increases in one time. (3) P-velocity of combination specimen is between the rock and coal, but is closer to coal. P-velocity of combination specimen experience an increasing-steady trend with the increase of rock strength. (4) A new method using P-velocity of rock and coal to obtain P-velocity of combination specimen is proposed, which is in good agreement with the test results. Additionally, we found that there exists a linear relationship between the P-velocity of coal-rock combination specimen and the elastic modulus. But no distinct relationship can be determined between the P-velocity of coal-rock combination specimen and the peak stress. This & nbsp;method provides a new idea for predicting the capacity of energy storage of coal-rock combination structure in the filed practice. (c) 2021 The Author(s). Published 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 | Major Program of Shandong Provincial Natural Science Foundation[ZR2019ZD13] ; Shandong Provincial Natural Science Foundation[ZR2019BD063] ; Major Scientific and Technological Innovation Project of Shandong Provincial Key Research Development Program[2019SDZY01] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000654682500008 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/27106]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Gu, Xue-bin; Gong, Xu-fei |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Peoples R China 3.Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China 4.Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Tong-bin,Gu, Xue-bin,Guo, Wei-yao,et al. Influence of rock strength on the mechanical behavior and P-velocity evolution of coal-rock combination specimen[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2021,12:1113-1124. |
| APA | Zhao, Tong-bin.,Gu, Xue-bin.,Guo, Wei-yao.,Gong, Xu-fei.,Xiao, Ya-xun.,...&Zhang, Cheng-guo.(2021).Influence of rock strength on the mechanical behavior and P-velocity evolution of coal-rock combination specimen.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,12,1113-1124. |
| MLA | Zhao, Tong-bin,et al."Influence of rock strength on the mechanical behavior and P-velocity evolution of coal-rock combination specimen".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 12(2021):1113-1124. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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