Ten experimental plots

with different slope and covering rate of vegetation

in Shen-Dong mine region were selected to conduct simulated rainfall.The intensity of simulated rainfall was designed to be 2.0 mm/min.Four of these plots were accumulated with abandoned soils in the different years of 1990~1991

1996~1997

2002~2003 and the one primary soil

the others were accumulated with abandoned soils in the year of 1990~1991.Ten curves of infiltration process content were acquired by processing data.The results showed that the soils accumulated in different years had different infiltration process

and with the increasing of accumulation time

the stable infiltrations were declined gradually to be similar to primary soil.Grade and length of slope affected the infiltration process respectively

while the change of grade and slope length had little influences on the stable infiltrations.