摘要
To investigate the relationship between the structural characteristics and seepage flow behavior of rough single rock fractures,a set of single fracture physical models were produced using the WeierstrasseMandelbrot functions to test the seepage flow performance.Six single fractures,with various surface roughnesses characterized by fractal dimensions,were built using COMSOL multiphysics software.The fluid flow behavior through the rough fractures and the influences of the rough surfaces on the fluid flow behavior was then monitored.The numerical simulation indicates that there is a linear relationship between the average flow velocity over the entire flow path and the fractal dimension of the rough surface.It is shown that there is good agreement between the numerical results and the experimental data in terms of the properties a of the fluid flowing through the rough single rock fractures.
基金
The authors are grateful to the National Natural Science Funds for Distinguished Young Scholars of China(Grant No 51125017)
the National Natural Science Foundation of China(Grant No 51374213)
the Creative Research Group Program of Jiangsu Province(Grant No 2014-27)
the Priority Academic Program Development of Jiangsu Higher Education Institutions(Grant No PAPD-2014-12)
the Open Research Project of State Key Laboratory for Geomechanics and Underground Engineering(Grant No SKLGDUEK1318)
the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No 51421003)for their financial supports.
