摘要
通过试验和理论分析,研究不同几何参数的岩石粗糙裂隙渗流的非达西系数β、临界雷诺数Re_c、非达西效应因子E等变化特性。研制裂隙渗流试验仪器,制作9个不同开度和裂隙粗糙度(joint roughness coefficient,JRC)的单裂隙模型,开展大范围雷诺数Re条件下粗糙裂隙渗流试验。根据渗流试验结果,得到了不同粗糙度(JRC=2~20)单裂隙的渗流特性,显示出粗糙度对裂隙的非线性渗流特性产生显著的影响。结合Forchheimer方程,从理论参数方面,对粗糙度的影响进行量化。研究显示:裂隙粗糙度越大,则越容易引起裂隙渗流的非线性,临界雷诺数越小,非线性作用越强。
Through experiments and theoretical analysis, the flow characteristics of rock rough fractures with different geometric parameters were studied, including non-Darcy coefficient β, critical Reynolds number Re_c and non-Darcy effect factor E. Testing equipment for fluid flow in fractures was developed and 9 rough single fracture models with different apertures and Joint Roughness Coefficients(JRC) were prepared. Laboratory tests on flow in rough fractures with Reynolds numbers, i.e., from 2 to 5000 were performed. The characteristics of flow in single fractures with different roughness(JRC=2-20) under wide range of Reynolds numbers were obtained. It was shown that fracture roughness had a significant impact on the nonlinear flow characteristics of the fracture. Based on the Forchheimer equation, the effects of fracture roughness on equation parameters were quantitatively studied. The larger fracture roughness was, the more likely it was to cause the nonlinearity of the fracture flow, the smaller critical Reynolds number was, and the stronger non-linear effect would be.
作者
刘杰
王者超
张宇鹏
孙华阳
LIU Jie;WANG Zhechao;ZHANG Yupeng;SUN Huayang(Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250061,Shandong,China;Key laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110004,Liaoning,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110004,Liaoning,China)
出处
《山东大学学报（工学版）》
CAS
CSCD
北大核心
2019年第4期70-77,85,共9页
Journal of Shandong University（Engineering Science）
基金
国家自然科学基金资助项目(51779045,51579141)
