Application and discussion of the borehole radial deformation method in deep borehole geostress measurement
文献类型：期刊论文
| 作者 | Han, Zengqiang; Li, Minghong; Wang, Chao; Wang, Jinchao; Huang, Xiaohua |
| 刊名 | FRONTIERS IN EARTH SCIENCE
 |
| 出版日期 | 2023-04-21 |
| 卷号 | 11 |
| 关键词 | geostress measurement borehole radial deformation stress relief method micro-optical imaging deep borehole |
| 英文摘要 | Geostress is an important parameter in rock-related fields, such as civil engineering, mining engineering, and energy engineering. There are kinds of methods for geostress measurement; however, many methods still have some limitations, especially when facing deep vertical boreholes. In this paper, we studied the characteristics of borehole radial deformation under the action of geostress. First, the rule of borehole radial deformation under the action of a two-dimensional geostress was studied, and the shape of the borehole radial changes to an ellipse under the action of geostress was proved. We derived the relationship between the magnitude of principal stresses and the parameters of the borehole ellipse, revealing the rule that the principal axis direction of the borehole ellipse is the direction of principal stress, which is the theoretical basis for the geostress calculation method based on borehole radial deformation measurement. Furthermore, we developed an apparatus that can simultaneously measure the changes in borehole diameters in multi-directions. The apparatus was designed with a multi-contact equidistant arrangement, micro-optical imaging measurement, electronic compass azimuth measurement, etc. It can adapt to the complex testing environment of deep boreholes and realize real-time monitoring of the borehole deformation process. Indoor tests were carried out to verify the working performance of the apparatus. The results showed that the measuring accuracy of the apparatus can reach 6.987 mu m, meeting the requirement of geostress measurement. Also, the results are well consistent with the loading force and direction of the testing machine. A field test was carried out in a deep borehole, and the borehole radial deformation data were obtained in the process of stress relief. The feasibility of the instrument and method was verified by comparison with the hydraulic fracturing method. This paper provides a new idea and method for geostress measurement, especially in deep vertical boreholes. |
| 学科主题 | Geology |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000982025100001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35130]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guangxi University 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; 3.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; |
| 推荐引用方式 GB/T 7714 | Han, Zengqiang,Li, Minghong,Wang, Chao,et al. Application and discussion of the borehole radial deformation method in deep borehole geostress measurement[J]. FRONTIERS IN EARTH SCIENCE,2023,11. |
| APA | Han, Zengqiang,Li, Minghong,Wang, Chao,Wang, Jinchao,&Huang, Xiaohua.(2023).Application and discussion of the borehole radial deformation method in deep borehole geostress measurement.FRONTIERS IN EARTH SCIENCE,11. |
| MLA | Han, Zengqiang,et al."Application and discussion of the borehole radial deformation method in deep borehole geostress measurement".FRONTIERS IN EARTH SCIENCE 11(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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