Amount of the disturbed lands, unpaved roads, abandon soil, slag bodies and coal
refuses in the development of the coal mine were the main material sources to the loss of
soil and water. The shenfudongsheng coalfield was the national key surveillance area of the
soil and water erosion, because of its fragile ecological environment and severe climate
condition. This paper researched runoff, sediment yield and hydrodynamics of the original
lands, disturbed lands, unpaved roads and abandon soil and slag bodies, using the rainfall
simulation experiment, in the shenfudongsheng coalfield, as to seek the rules and the
models of the soil and water erosion, and provided some basic advises for the control
measures. Main conclusions showed as follow:
(1)there was a linear relationship between runoff rate and rainfall intensity. Runoff
rate of different underlying surface presented trend of increases first then fluctuation stable.
The orders of the runoff were: unpaved roads > abandon soil > slag bodies of more sand >
slag bodies of less sand > original lands > disturbed lands > coal refuse.
(2)Soil moisture content in the 1m soil layer of the original lands, disturbed lands and
unpaved roads increased with the depth increase before rainfall, which decreased with the
depth increase after rainfall. There was no different in the soil moisture content of below
40cm soil layer before and after rainfall, the order of which of 0-40cm soil layer were:
disturbed lands > original lands > unpaved roads.
(3)Sediment concentration and sand transport rate of runoff of the different underlying
surfaces increased with the rainfall intensity increase, both of which had a power function
relationship with rainfall intensity. The sediment concentration of the original lands,
disturbed lands and unpaved roads all increased gradually with the rainfall time under the
condition of small gradient and little rainfall intensity, and presented a trend of increase first and decrease after under the condition of big gradient and heave rainfall intensity. The
sediment concentration of the abandon soil and slag bodies presented a tend of decrease,
and became very large at some time, in which it occurred small landslides and debris flow,
and then decreased rapidly. The order of sediment yield of different underlying surfaces in
actual situation were： abandon soil > slag bodies of more sand > slag bodies of less sand
> unpaved roads > disturbed lands > original lands > coal refuse.
(4)Flow rate, Reynolds number, flow depth, stream shear force and stream power of
different underlying surfaces increased with rainfall intensity increase, all of which had
linear or power relationships with the rainfall intensity.
(5)Soil erosion rate had linear or power relationships with rainfall intensity, flow rate,
flow depth, stream shear force and stream power, which of abandon soil and slag bodies of
sand more was affected less by flow rate.
(6)The dispose of planting grass and digging hollow of fish scale both had the affect
of decreasing runoff, also can fasten the slope surface and prevent the small landslides
Key Words：shengfu-dongsheng coal field; different underlying surface; runoff; sediment