Research status and trend of soil reconstruction based on rock slope ecological restoration

Rocky slopes have become the key and difficult areas for ecological restoration due to the extremely poor ground conditions and the lack of basic conditions for vegetation growth, and the creation of a good environment for vegetation growth is the key factor to realize ecological restoration of slopes. Soil reconstruction is of great significance to land quality improvement and ecological environment restoration, and it is also one of the core contents of ecological restoration of rocky slopes in open pit mines, and the quality of reconstructed soil is related to the success or failure of ecological restoration of rocky slopes. Therefore, research on soil reconstruction is one of the important elements of green mine construction. On the basis of collecting the relevant research and practice data of many scholars and engineers, the research status, main problems and future development trend of soil reconstruction were summarized from the aspects of ecological restoration techniques of rock slope such as spray seeding, groove drilling, frame and pillow pocket. It is pointed out that the current ecological restoration soil reconstruction of rocky slopes has deficiencies in terms of topsoil resources, restoration costs, soil structure, physicochemical properties, water stability, nutrient loss, management measures, ecological adaptability of vegetation communities, the overall stabilization mechanism of slope‒root system‒reconstructed soils, the research and development of new materials, new processes, and the monitoring of information technology of soil reconstruction. It is believed that future research work should be strengthened on the research and development of low-cost topsoil substitution materials and ecological materials, the coupling mechanism between soil elements and their related elements, the dynamic evaluation of reconstructed soil quality, the screening and cultivation of plants suitable for extreme harsh environments, the overall stabilization mechanism of the shallow fissured rock body of slopes‒plant roots‒reconstructed soil, and the carbon sequestration and sink enhancement effect of soil reconstruction for ecological restoration of rocky slopes of mines under the dual-carbon target. The research results are of great significance in guiding and informing the research and development and application of soil reconstruction technology for ecological restoration of rocky slopes.