关键词: 铁尾矿　, 植被混凝土　, 耐崩解性　, 水稳性　, 抗冲刷性

Abstract: In order to realize the comprehensive utilization of iron tailings and agricultural solid waste,and to achieve the purpose of "waste recovery",we used iron tailings as the base material,supplemented with cement,plant fibers,water retaining agents,organic fillers,organic fertilizers,topsoil of the mining area and other materials,and used the orthogonal test of L9 (34) to formulate the vegetative concrete.Under the conditions of plant suitability and quick-acting nutrient content to satisfy normal plant growth,systematic research work was carried out on disintegration resistance,water absorption,water retention and erosion resistance under moderate or heavy rainfall conditions.The results showed that the curing time,cement,and plant fiber admix ture were the key factors affecting the disintegration resistance of the vegetated concrete,and the disintegration resistance of the vegetated concrete increased significantly with the extension of the curing time;The saturated water absorption rate of vegetation concrete of group 3,5,6,7,8 is more than 6%,and the water content is not less than 60% of its saturated water content after drying naturally for 7 d,and its saturated water absorption rate and water-holding capacity can satisfy the basic requirements of the ecological restoration project for vegetation concrete on the slopes of the mining area;With the same composition,slope ero sion tends to increase with increasing rainfall intensity and rainfall duration;The resistance of vegetated concrete to rainwater e rosion increased with increasing cement and plant fiber content,while its resistance to rainwater erosion decreased with increas ing water retention agent content.On the premise of being able to better satisfy the indicators of plant suitability,disintegration resistance,water absorption,water retention,and resistance of the substrate to rainwater erosion under moderate or heavy rain fall conditions at the same time,Ratio 3 and Ratio 5 are preferred as alternatives for the coagulation of vegetation on mine slopes.