期刊
INTERNATIONAL JOURNAL OF GEOMECHANICS
卷 18, 期 11, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0001277
关键词
Single rock fracture; Coupled shear-flow tests; Asperities crushed; Cubic law; Mechanical and hydraulic apertures
资金
- Natural Science Foundation of Shaanxi province [2017JZ013]
- National Natural Science Foundation of China [51679197, 51409206, 51409208]
Understanding the mechanical and hydraulic behaviors in a single fracture is important for underground rock engineering. In this study, coupled shear-flow tests were performed on five single fractures with regular dentate asperities, under different constant normal stresses and high inlet hydraulic pressures, to investigate the change of stress, displacement, and flow rate during shear. A new radial flow cubic law was established to estimate the hydraulic behavior, and a two-dimensional (2D) finite-element model, obtained by solving the Navier-Stokes equations, was used to analyze the discrepancy of the values between the new cubic law and experiments. Infilling materials had a strong influence in both mechanical and hydraulic behaviors. The discrepancy and e(m):e(h) ratio were influenced by recirculation zones, infilling materials, roughness, contact areas, and inertia force. The nonlinearity of fluid flow caused by inertia force had remarkable influence on hydraulic behavior with high hydraulic pressure. Increasing hydraulic pressure decreased hydraulic conductivity, the e(m):e(h) ratio, and discrepancy during the whole shear process.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据