Study On Non Soil Ecological Restoration Technology Of Strong Acid Tailings In Nonferrous Metal Mine

With the development of economy,the scale of mining development gradually expanded,the number of beneficiation tailings will continue to increase,the scale of ore dressing is getting bigger and bigger,the number of beneficiation tailings will be increased,and the ecological restoration work of tailings is very important.Most of the traditional ecological restoration of tailings are used to cover upland vegetation.The method needs to consume a lot of soil source,high investment cost and not suitable for large-scale promotion.In this paper,the Feizhaogou tailings pond in Chengmenshan copper mine is taken as the research object,and the ecological restoration is carried out directly on the tail sand surface to explore the feasibility of the ecological restoration of the tailings.In this paper,the soil properties were analyzed and analyzed,including soil acidity index(PH,EC,EH,NAG),heavy metal elements(heavy metal and active),nutrient(organic matter,total phosphorus,total potassium and available potassium)were used to analyze the soil properties.,Through the analysis of the nature of the soil,the regional area of the study area,in the typical area of the reservoir area to choose a length of 100 m wide and 40 m area as the test area,simulate the closed drains after the ridge set ridge;experimental area and then divided into 10 small Contrast area,the test for discrete comparison;plant configuration with shrimp moss with,to achieve long-term ecological stability.In each area,different soil improvement methods and plant allocation patterns were used to investigate and improve the soil physical and chemical indexes,including plant species,plant biomass and diversity,and the most reasonable soil Improved mode and plant configuration process.Through the experimental study of this paper,it is concluded that the soils of the tailings can be improved by using the soil modified matrix and lime,and the combination pattern of the best varieties can be screened and the planting density of each cultivar is 20% 40% of the soil seed bank resources + 20% leguminous plants + 10%(tall fescue + Cynodon dactylon + Baixi grass);this test were screened out of eight dominant varieties: Bidens grass,Tian Jing,And the growth characteristics of these cultivars can be observed and summarized as a kind of vegetation restoration species with improved acid-free tailings.The results of this study break through the traditional model of strong acid tailings reservoir,which provides a good reference and guidance for the ecological restoration of abandoned mines,tailings and waste dumps.