考虑离散裂隙网络非线性渗流的岩体渗透特性研究

doi:10.3724/1000-6915.jrme.2025.0189

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Abstract To address the limitations of traditional linear seepage theory under complex fracture conditions, a novel rock mass permeability coefficient is introduced. This model integrates the empirical advantages of the Izbash equation with the theoretical framework of the Forchheimer equation. Based on the geological conditions of the Huanglong Pumped Storage Power Station project, a three-dimensional fracture network model was developed using the Monte Carlo stochastic method. Through numerical simulations and in-situ borehole water pressure test data, this research systematically examines the interaction mechanisms among fracture geometric characteristics, network connectivity, and nonlinear seepage behavior. The results reveal the following: (1) A distinct exponential relationship exists between the seepage parameter p and the water permeability rate q. Complete fracture network connectivity is achieved when p＞8.65, which is accompanied by a significant reduction in permeability anisotropy. (2) For p＜4.28, the effective seepage area decreases by 71.3%, with a maximum velocity reduction of 76.21%. (3) Compared to conventional empirical formulas, the proposed model enhances the calculation accuracy of rock mass permeability coefficients in medium to high permeability conditions (1–30 Lu) by incorporating a non-Darcy flow effect factor E. This innovation demonstrates superior performance in characterizing inertial effects and local vortex energy dissipation mechanisms.

Key words： rock mechanics fracture network non-linear flow permeability pressure packer test

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	Articles by authors
	SUN Yicheng1
	WEI Yufeng1
	HU Shuhan2
	QIN Xingzhou1

Cite this article:

SUN Yicheng1,WEI Yufeng1,HU Shuhan2, et al. Permeability characteristics of rock masses incorporating nonlinear flow behaviors in discrete fracture networks[J]. , 2025, 44(9): 2444-2455.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2025.0189 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/I9/2444

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