Abstract: Horizontal and vertical seepage experiments with granular material from Dexing Copper Mine were completed on a multifunctional experimental shelf. The experiment projects were homogenous designed and the data were analyzed in SPSS software. It is shown that the maximum seepage coefficient appears in clown-going flow, the smaller in horizontal flow and the minimum in up-going flow. All the anisotropy coefficients vary from 1.38 to 6.73 and their average value is 4. While the content of coarse grains is in the range of 35% to 60% and the content of mud is 1% to 5%, the seepage coefficient is initially uprising but latter down-going. The seepage coefficient is correlated with porosity in a power function and uprises with enlarging porosity. The porosity declines with increasing content of grains in the range of 0.1 to 0.2 mm and heightens with increasing content of grains in the ranges of 10 to 8 mm and 8 to 4 ram. The relation of seepage coefficient and Reynolds number could he expressed as a power equation and they are identical to determine seepage state. The horizontal and vertical seepage coefficients of Xiyuan dump are 3.68× 10^-2 m·s^-1 and 1.51 × 10^-2 m·s^-1, respectively.