In order to explore the impact of different ecological restoration modes on the runoff and sediment production law of the dump in the opencast coal mine

according to the field runoff plot methods

the field standard runoff plot method was used to observe the runoff and sediment production of the dump in the mining area with different ecological restoration modes for a continuous rainy season. The results showed that: (1) The rainfall distribution in the study area is uneven during the year

mainly concentrated in the flood season from July to September

the rainfall in this period accounted for 77.03% of the average annual rainfall

which was the period with the largest loss of runoff and sediment in the year; (2) Compared with the bare slope (sowing only shrub and grass seeds)

different ecological restoration modes had the effect of runoff and sediment reduction

but the benefits of different ecological restoration modes for runoff and sediment reduction were significantly different. Runoff reduction effect from large to small listed in the order of Salix psammophila checkerboard mode (64.35%) > Ecological rods mode (56.56%) > Ecological geo-textile bag mode (52.74%) > Wire gabion mode (48.70%) > Hedgerows mode (45.51%) > Soil improvement mode (35.89%) > Non-woven fabric covering mode (33.97%) > Gravel capping mode (8.19%);The sediment reduction effect were Salix psammophila checkerboard mode (69.41%) > Ecological rods mode (61.28%) > Ecological geo-textile bag mode (55.09%) > Wire gabion mode (52.43%) > Hedgerows mode (48.72%) > Soil improvement mode(42.09%) > Non-woven fabric covering mode (38.31%) > Gravel capping mode (19.34%); (3) The response characteristics of sediment yield from different ecological restoration modes were all significantly positively correlated (P<0.05

r>0)

the Salix psammophila checker board mode had a smaller response to runoff

followed by the Ecological rods mode

and the Rock cover mode had the greatest response to runoff.