考虑三维片理效应的板岩巴西劈裂试验研究

doi:10.13722/j.cnki.jrme.2018.1188

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Abstract The slate with foliations exhibits significant anisotropies in terms of physical and mechanical properties. Brazilian splitting tests were carried out considering two factors such as the foliation angle and the loading direction，and the three-dimensional structure effects of foliation planes were studied in depth. The results show that the three-dimensional structure effects of foliation planes have a significant influence on the mechanical strength and failure characteristics of slate and that the variation trends of Brazilian splitting strength with loading direction are obviously different at different foliation angles. When the foliation angle ranges from 0°to 15° or from 75°to 90°，the three-dimensional spatial effect of the fracture surface is not obvious and the macroscopic cracks on both sides of the disc have certain similarities. When both the foliation angle and the loading direction are in the range of 30° to 60°，however，the fracture surfaces present a three-dimensional spatial distribution due to the coupling effect of the two factors and the macroscopic cracks formed on both sides of the disc exhibit an approximately anti-symmetric positional relationship. The energy storage capacity of slate in Brazilian splitting tests is negatively correlated with the foliation angle but positively with the Brazilian splitting strength. It is also revealed that the foliation angle and the loading direction respectively have more significant effects on the Brazilian splitting strength and the fracture pattern，and that，with increasing the foliation angle，the anisotropy ratios of the Brazilian splitting strength and the energy show an increasing trend. The research results can provide a reference for the analysis of tensile mechanical properties of transversely isotropic rocks.

Key words： rock mechanics slate Brazilian tests three-dimensional foliation effect anisotropy fracture pattern

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	Articles by authors
	DING Changdong1
	2
	HU Dawei1
	2
	ZHOU Hui1
	2
	LU Jingjing1
	2
	MA Dongdong1
	2
	ZHANG Yang3

Cite this article:

DING Changdong1,2,HU Dawei1, et al. Brazilian splitting tests of slate considering three-dimensional foliation effect[J]. , 2019, 38(2): 301-312.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.1188 OR http://www.rockmech.org/EN/Y2019/V38/I2/301

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