Abstract: With the combination of investigation, analogy, simulation, field test and demonstration, the characteristics of land disturbance and the suitable techniques for ecological rehabilitation at Pingshuo Antaibao Opencut Coal Mine were studied from 1991 to 1995.The original geological strata was substituted by a disorder derelict layer of rocks and loess with 100～150m height, resulting in the formation of typical artificial loose piled landforms, namely dumps.The original topographic appearance was substituted by terraced slopes, resulting in severe uneven subsidence during 5～10 years and instability of steep slopes.The original surface soil was substituted by loess typed parent material and stone shaped materials, resulting in soil bulk density >1.6g·cm^-3, resistance coefficient to plant roots 30～60kg·cm^-3, and organic matter content < 4.0 g·kg^-1 .After the original vegetation destroyed, it was very difficult to restore the original vegetation, resulting in soil erosion index >15000t·km^-2 ·yr^-1, 33% greater than that of original topography.The suitable technological systems for ecological rehabilitation include five engineering and three biological reclamation techniques.

Key words: Loess area, Opencut coal mine, Disturbed land, Ecological rehabilitation