Abstract:

Seepage analysis fractural rock mass has very close relation with other analyses of rock mass. Seepage theory of fractural network rock mass is based on linear cubic law. When the water head is very high or the fracture flux is very large, fracture stream doesn’t abide by linear cubic law; if such seepage is still analyzed by using linear cubic law, it will bring great errors, even make engineering disaster. If the fluid in the fractures doesn’t abide by the linear cubic law, the study for themselves’ rules is very important and essential. The rules of nonlinear seepage and non-cubic seepage are reaearched; it is concluded that (1) if the seepage rule deflected the linear cubic law very much, there would exist great differences in water head and flux; if the seepage rule deflected the linear cubic law very little, the diffrerences would also be very little, it can be simplified to linear cubic seepage; (2) if the seepage rule deflected the cubic-law very much, there would exist great differences in water head and flux; if the seepage rule deflected the cubic-law very little, the diffrerences would also be very little, it can be simplified to cubic seepage; (3) for the nonlinear non-cubic seepage, both the nonlinear effect and the non-cubic effect should be taken into account.

Key words: rock mass of fracture network, nonlinearity, non-cube, unsteadiness, seepage