Characterization of the brittleness of hard rock at different temperatures using uniaxial compression tests

doi:10.12989/gae.2017.13.1.063

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Characterization of the brittleness of hard rock at different temperatures using uniaxial compression tests
	Guo, Fan 1; Chen, Guoqing 1,2; Li, Tianbin 1; Wang, Wei 1; Yin, Hongyu 1
刊名	GEOMECHANICS AND ENGINEERING
	2017
卷号	13 期号:1 页码:63-77
关键词	deep buried tunnel high geothermal activity brittle failure expansion stress
ISSN号	2005-307X
DOI	10.12989/gae.2017.13.1.063
英文摘要	The failure mechanism of a deep hard rock tunnel under high geostress and high geothermalactivity is extremely complex. Uniaxial compression tests of granite at different temperatures were conducted. The complete stress-strain curves, mechanical parameters and macroscopic failure types of the rock were analyzed in detail. The brittleness index, which represents the possibility of a severe brittleness hazard, is proposed in this paperby comparing the peak stress and the expansion stress. The results show that the temperature range from 20 to 60 degrees C is able to aggravate the brittle failure of hard rock based on the brittleness index. The closure of internal micro cracks by thermal stress can improve the strength of hard rock and the storage capacity of elastic strain energy. The failure mode ofthe samples changes from shear failure to tensile failure as the temperature increases. In conclusion, the brittle failure mechanism of hard rock under the action of thermal coupling is revealed, and the analysis result offers significant guidance for deep buried tunnels at high temperatures and under high geostress.
WOS研究方向	Engineering
语种	英语
出版者	TECHNO-PRESS
WOS记录号	WOS:000407147500004
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4098]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Guo, Fan,Chen, Guoqing,Li, Tianbin,et al. Characterization of the brittleness of hard rock at different temperatures using uniaxial compression tests[J]. GEOMECHANICS AND ENGINEERING,2017,13(1):63-77.
APA	Guo, Fan,Chen, Guoqing,Li, Tianbin,Wang, Wei,&Yin, Hongyu.(2017).Characterization of the brittleness of hard rock at different temperatures using uniaxial compression tests.GEOMECHANICS AND ENGINEERING,13(1),63-77.
MLA	Guo, Fan,et al."Characterization of the brittleness of hard rock at different temperatures using uniaxial compression tests".GEOMECHANICS AND ENGINEERING 13.1(2017):63-77.