岩体水力劈裂的细观PFC-CFD联合分析

doi:10.13722/j.cnki.jrme.2014.0878

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Abstract

Existing studies on hydraulic fracturing are mainly based on macroscopic continuum method. It is difficult to reveal the microscopic mechanism of hydraulic fracturing. Taking advantage of PFC in modeling material failure and crack propagation，we developed a coupled PFC-CFD method for analyzing crack propagation in meso-level and verified by a simplified model test of a cylinder rock specimen. Then taking a tunnel project for example，we simulate the crack propagation in the process of tunnel excavation used this method and analyze the effects of the distance between the tunnel face and the high-pressure water source on the crack propagation in unsteady state seepage stage. The result shows that the coupled method is very suitable to simulate the processes of hydraulic fracturing in rock and could be applied to safety assessment in tunnel projects.

Key words： rock mechanics deep tunnel hydraulic fracturing microscopic fluid-solid couple model

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	Articles by authors
	NI Xiaodong1
	2
	ZHAO Shuailong1
	2
	WANG Yuan1
	2
	WEI Peng1
	2

Cite this article:

NI Xiaodong1,2,ZHAO Shuailong1, et al. NUMERICAL ANALYSIS OF HYDRAULIC FRACTURING OF ROCK MASS ON MESOSCOPIC LEVEL BY COUPLED PFC-CFD METHOD[J]. , 2015, 34(S2): 3862-3870.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0878 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3862

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