Abstract: Shenfu-Dongsheng coalfield is an important energy and industrial site in China. However, severe soil and water erosion occurred on the mining wastes in the areas. The objective of this study was to measure and analyze runoff and sediment loads from the undisturbed lands in order to estimate increased sediment loads on the mine wastes as well as on disturbed land and road. Field scouring experiments on the undisturbed lands in the coalfield during exploitation were conducted by using the method of simulated overland flow. Results showed that runoff and sediment yield increased linearly with the increase of overland flow and slope. Moreover, the relationship between runoff and sediment yield on the undisturbed lands can be described with the power function, Ms=0.049W^0.93.