裂隙岩体细观裂纹演化机制及局部力学特性研究

doi:10.19286/j.cnki.cci.2021.09.007

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Abstract In order to study mesoscopic mechanics characteristics and the internal crack development of the fractured sandstone, a uniaxial compression experiment and PFC2D numerical simulation analysis of different angles fractured red sandstone specimens were performed. And evolution of mesoscopic crack simulation and surrounding stress of the fracture were obtained in different angles fractured red sandstone. The results showed that the macro failure mode of complete specimen would be significantly affected by the prefabricated single fracture. Within a certain angle range, the initial crack originated at the prefabricated fracture, and with the increase of the fracture angles, the range of the initiation location increased, also the aggregation effect of the mesoscopic crack at the crack tip became less obvious. The difference of stress peak between the two fractured tips and the upper (lower) part decreased with the increase of fractured angles.

Key words： fractured rock mass PFC2D simulation fractured angle the crack evolution surrounding stress

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	Articles by authors
	Diao Yanglong1
	Luo Feng1
	2
	3
	Li Meng1
	2
	3
	LV Zhen1
	Xu Peidong1
	Guo Yijun1

Cite this article:

Diao Yanglong1,Luo Feng1,2等. Study on meso-crack evolution mechanism and local mechanical properties of fractured rock mass[J]. CCI, 2021, 44(9): 22-26..

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2021.09.007 OR http://www.mtyhg.com.cn/EN/Y2021/V44/I9/22

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