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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Study on the law of influence of matrix particle size change on water flow in fracture-matrix system

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基质粒径变化对裂隙-基质系统中水流运动的影响规律研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jul. 2026, Vol.49 No.7: 905-909

DOI: 10.3969/j.issn.1003-5060.2026.07.006

Authors

ZHA Rong, QIAN Jiazhong, MA Lei, YAN Xiaosan, HUANG Yihang

(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: In this paper, a set of fracture-matrix models were designed, and three kinds of quartz sand with different particle sizes were selected to fill the matrix region of the fracture-matrix system, and the influence of quartz sand with different particle sizes on the water flow characteristics in the fracture-matrix model was studied. The results show that the decision coefficients of the Forchheimer equation are higher than those of Darcy's law, and the Forchheimer equation fits the nonlinear fluid flow in the fracture-matrix system better than Darcy's law. The simulation results of the Kozeny-Carman model show that there is a linear relationship between the matrix permeability coefficient and the characteristic particle size in the fracture-matrix system across all three matrix particle sizes. The larger the hydraulic opening in the fracture-matrix system, the weaker the fracture permeability, the greater the non-Darcy seepage coefficient, and the more obvious the non-Darcy seepage phenomenon.

Keywords: matrix particle size; fracture-matrix system; permeability coefficient; non-Darcy coefficient; hydraulic opening

作者信息

查蓉，钱家忠，马雷，严小三，黄逸航

（合肥工业大学资源与环境工程学院，安徽合肥 230009）

摘要和关键词

摘要: 文章设计1组裂隙-基质模型,选用3种不同粒径的石英砂填充裂隙-基质系统的基质区域,研究不同粒径的石英砂对裂隙-基质模型中水流特征的影响。结果表明: Forchheimer方程的决策系数均高于达西定律的决策系数,与达西定律相比,Forchheimer方程能更好拟合裂隙-基质系统内流体的非线性流动; Kozeny-Carman模型模拟结果显示,3种基质粒径的裂隙-基质系统中基质渗透系数与特征粒径之间都呈线性关系; 裂隙-基质系统中水力开度越大,裂隙渗透性越弱,非达西渗流系数越大,非达西渗流现象越明显。

关键词: 基质粒径；裂隙-基质系统；渗透系数；非达西系数；水力开度

Funding

国家自然科学基金资助项目（42072276）；国家自然科学基金联合基金资助项目（U2267218）

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