气候变化领域集成服务门户(CCPortal): Present in situ stress measurement in the eastern segment of Yarlung Zangbo River fault and fault activity analysis

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DOI	10.16285/j.rsm.2023.0545
	Present in situ stress measurement in the eastern segment of Yarlung Zangbo River fault and fault activity analysis
	Sun Wei-feng; Huang Huo-lin; Sun Dong-sheng; Meng Wen; Chen Qun-ce
发表日期	2024
ISSN	1000-7598
起始页码	45
结束页码	4
卷号	45 期号:4
英文摘要	In order to determine the in situ stress state of the newly built hydropower station project in Jiacha county, and understand the activity of the eastern segment of the Yarlung Zangbo River fault zone, we obtained the in situ stress data in the engineering field by using the self-developed deep-hole stress measuring equipment based on the hydraulic fracturing method. We analyzed the fault activity by employing the Mohr-Coulomb failure criterion and the collected in situ stress data along the eastern segment of the Yarlung Zangbo River fault zone. The results showed that: (1) The magnitudes of the maximum horizontal stress SH ranged from 6.07 MPa to 37.62 MPa, the values of the minimum horizontal stress Sh were from 3.13 MPa to 20.33 MPa at the depth from 122.75 m to 418.75 m, and the dominant direction of the measured maximum horizontal principal stress was nearly NNE. (2) The stress regime was mainly characterized by SH> Sh> Sv (Sv is the vertical principal stress), which was prone to reverse faulting. (3) Most of the measured and collected Mohr stress circles intersected the failure threshold line with friction coefficient equal to 0.6, which indicated that the eastern segment of the Yarlung Zangbo River fault zone was in a high level of fault slip instability. Furthermore, the fault slip risk of the west section from Gongga to Langxian was higher than that of the east section near Linzhi along the eastern segment of the Yarlung Zangbo River fault zone.
英文关键词	in situ stress; hydraulic fracturing method; fault activity; Yarlung Zangbo River fault; Qinghai-Tibet plateau
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:001223065500017
来源期刊	ROCK AND SOIL MECHANICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/288933
作者单位	China Geological Survey; Chinese Academy of Geological Sciences; Institute of Geomechanics, Chinese Academy of Geological Sciences; Ministry of Natural Resources of the People's Republic of China; POWERCHINA Huadong Engineering Corporation Limited
推荐引用方式 GB/T 7714	Sun Wei-feng,Huang Huo-lin,Sun Dong-sheng,et al. Present in situ stress measurement in the eastern segment of Yarlung Zangbo River fault and fault activity analysis[J],2024,45(4).
APA	Sun Wei-feng,Huang Huo-lin,Sun Dong-sheng,Meng Wen,&Chen Qun-ce.(2024).Present in situ stress measurement in the eastern segment of Yarlung Zangbo River fault and fault activity analysis.ROCK AND SOIL MECHANICS,45(4).
MLA	Sun Wei-feng,et al."Present in situ stress measurement in the eastern segment of Yarlung Zangbo River fault and fault activity analysis".ROCK AND SOIL MECHANICS 45.4(2024).