真三轴应力条件下层状复合岩石破坏准则

doi:10.13722/j.cnki.jrme.2016.0682

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Abstract In order to explore the strength characteristics of stratified composite rock，a homogenization procedure was undertaken to convert the layered composite rock into an equivalent homogeneous one and an failure criterion based on the MLC failure criterion under true triaxial condition was established in terms of the strength and geometric parameters. A large number of tests on sandstone，siltstone，slate and composite rock under different true triaxial conditions(changing lode?s angle and ?3- and coefficient of intermediate principal stress-constant tests) were carried out with the multi-functional experiment system built in-house for fluid-solid coupling under true triaxial condition to investigate the effect of coefficient of intermediate principal stress on strengths. The results showed that the proposed criterion for layered composite rock described with fair accuracy the ultimate behaviour of layered rocks subjected to the true triaxial conditions.

Key words： rock mechanics true triaxial stress conditions layered composite rock coefficient of intermediate principal stress failure criterion

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	Articles by authors
	YIN Guangzhi1
	2
	3
	LI Xing1
	2
	LU Jun1
	2
	SONG Zhenlong1
	2

Cite this article:

YIN Guangzhi1,2,3, et al. A failure criterion for layered composite rock under true triaxial stress conditions[J]. , 2017, 36(2): 261-269.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0682 OR http://www.rockmech.org/EN/Y2017/V36/I2/261

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