Based on the simplification about the control equations of systems of Forchheimer's non-Darcy flow,a set of dimensionless partial-differential equation is obtained,and analysis on the existence,stability and jump of the steady states of the system is carried out,and hysteretic bifurcation in the system is discussed in details.

Test study on the penetrating properties of non-Darcy flow in rock;

The configuration of test system of permeability measurement of non-Darcy flow in post-failure rock,test principle and plan,and the processing method for test data are presented.

Coal samples were collected from a Gas-rich coal mine and standard samples are made from them to obtain the seepage properties of non-Darcy flow of such coal rocks.

One-dimensional consolidation of saturated cohesive soil considering non-Darcy flows

Currently, the low permeability oilfield in Changqing is in the status of low natural output capacity and difficulty to see injection-water effect of oil extraction well, therefore it is necessary to study non-Darcy flow characteristic and mechanism of low permeability rocks.

In order to improve the precision of consolidation computation,Terzaghi′s one-dimensional consolidation theory is modified based on the non-Darcy flow described by the power function for the lower velocity of flow and the linear function for higher velocity of flow,and the numerical analysis is performed using the finite volume method.

One-dimensional consolidation properties of saturated clays with non-Darcy seepage;

Terzaghi’s one-dimensional consolidation theory is modified based on the non-Darcy seepage equation considering the initial hydraulic gradient,and the finite difference scheme is introduced.

Terzaghi s one-dimensional consolidation theory is modified based on the modified non-Darcy seepage equation considering the initial hydraulic gradient,and solved by using the finite volume method in this paper.