Abstract
In this paper, the slurry seepage dynamics model is established, the critical con-ditions for instability of the seepage dynamics model are discussed, and the ef-fects of power index, effective mobility and non-Darcian flow factors on the seepage velocity are analyzed. The results show that in the 2-D logarithmic pa-rameter space, the boundary between the stability zone and the instability zone of seepage is a straight line, and the absolute value of the slope of the straight line decreases with the increase of the power index.