尼泊尔上塔马克西水电站三维地应力测试分析

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Abstract Geostress measurement was conducted in the south of Himalayas for the first time. 3D hydraulic fracturing method was adopted to measure the geostress at Upper Tamakoshi hydropower station in Nepal. The results are reliable in comparison with the related overseas study. The major principal stress 1 in this field is 17.00 MPa，approximately in NS direction，and small dip angle means its orientation of action is almost horizontal. The intermediate principal stress 2 is 13.39 MPa，approximately in EW direction. The minor principal stress 3 is 8.07 MPa，its azimuth and dip angle indicate that the trend of 3 points down. All of these results prove the combined action of crustal stress and rock gravity. The conclusion of medium-high stress state in this field was drawn according to the ratio of rock mass strength to stresses. The stress tensor characteristics parameter was calculated，which indicates that the geostress field has the characteristics of compression-shear. The larger shear action is one of the main factors that induce frequent tectonic movements. The work is helpful for full understanding of stress state in this field. Furthermore，all these data are greatly important for analysis of fault activity and crustal movement in south of Himalayas mountain.

Key words： hydraulic engineering south of Himalayas mountain 3D hydraulic fracturing stress state

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	Articles by authors
	WANG Jianxin1
	GAO Chengyu2
	GUO Qiliang1
	LIU Xiaoli3
	YANG Ye2

Cite this article:

WANG Jianxin1,GAO Chengyu2,GUO Qiliang1, et al. MEASUREMENT AND ANALYSIS OF 3D GEOSTRESS AT UPPER TAMAKOSHI HYDROPOWER STATION IN NEPAL[J]. , 2012, 31(S1): 3339-3344.

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/IS1/3339

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