从水土保持、土地复垦及环境保护的综合角度考虑，采用“五级指标逐级推断法”，即岩土污染程度、重塑地形坡度、地表物质组成、有效覆土厚度和土体容重五级分类指标逐级推断，确定露天煤矿待复垦土地适宜性评价单元类型为：（１）厚层覆土平台；（２）薄层覆土斜坡；（３）岩土混排斜坡；（４）混岩、页岩碎砾坡；（５）砂岩石砾坡。 From the perspectives of soil and water conservation, land reclamation and environmental protection, the “five-level index step by step inference method” is adopted, that is, the degree of geotechnical pollution, the slope remodeling of the terrain, the composition of surface materials, the effective cover soil thickness and the soil bulk density of five According to the classification index, the suitability evaluation units of opencast coal mine to be reclaimed are determined as follows: (1) Thick-layer soil-covering platform; (2) Thin-layer soil cover slope; (3) Geotechnical mixing slope; , Shale gravel slope; (5) sandstone gravel slope.