Determination of geo-stress in deep strata incorporating borehole diametral deformation measurement and overcoring
文献类型：期刊论文
| 作者 | Han, Zengqiang2,3; Wang, Chao2,3; Wang, Chuanying2; Jiao, Yuyong1; Wang, Yiteng2; Wang, Jinchao2; Huang, Xiaohua4 |
| 刊名 | MEASUREMENT
 |
| 出版日期 | 2023-08-15 |
| 卷号 | 218期号:-页码:- |
| ISSN号 | 0263-2241 |
| 关键词 | Geo-stress measurement Borehole diametral deformation Overcoring Stress relief Wireline coring Micro-optical imaging |
| 英文摘要 | In deep energy engineering such as coal mining, oil & gas extraction, underground hydropower projects and deep buried water tunnels, rock failure and large deformation hazards often occur due to the complicated geological conditions and high geo-stress. Knowledge of the geo-stress state is an essential content in deep rock engineering. The complex environment of high temperature and high hydraulic pressure in deep rock mass makes geo-stress measurement more difficult than shallow strata. In this study, a novel method for geo-stress measurement based on the cross-sectional borehole diametral deformation is proposed. A borehole diametral deformation gage (BDD gage) is developed based on the measurement method. The scheme design of multi-contacts and micro-optical imaging avoid the influence of the high temperature and high hydraulic pressure environment. The results of the calibration experiment show that the measurement accuracy of BDD gage reaches 3 & mu;m. Incorporating with the wireline coring tool for rapid overcoring, geo-stress measurement in deep vertical borehole via stress relief is realized. Field test procedure is summarized and application is carried out in a deep borehole of limestone stratum in Guizhou Province, China. Measurement process is verified to be rapid and simple. Measurement results including magnitude and direction of principal stresses are consistent with the results from hydraulic fracturing method. Special discussions were conducted on the measurement error of BDD gage and the improvement design of wireline coring tools. This article provides new ideas for geo-stress measurement in deep borehole. |
| 学科主题 | Engineering ; Instruments & Instrumentation |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:001023027000001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35405]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning, Guangxi 530004, China |
| 推荐引用方式 GB/T 7714 | Han, Zengqiang,Wang, Chao,Wang, Chuanying,et al. Determination of geo-stress in deep strata incorporating borehole diametral deformation measurement and overcoring[J]. MEASUREMENT,2023,218(-):-. |
| APA | Han, Zengqiang.,Wang, Chao.,Wang, Chuanying.,Jiao, Yuyong.,Wang, Yiteng.,...&Huang, Xiaohua.(2023).Determination of geo-stress in deep strata incorporating borehole diametral deformation measurement and overcoring.MEASUREMENT,218(-),-. |
| MLA | Han, Zengqiang,et al."Determination of geo-stress in deep strata incorporating borehole diametral deformation measurement and overcoring".MEASUREMENT 218.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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