Research On Ecological Restoration Base Material Of Sediment-based Limestone Mine

Ectopic sediment treatment technology cannot solve a large number of sediment,and its treatment cost is high,which will have a certain impact on economy and ecology.At present,there are few studies on the utilization of nutrient elements in sediment.The steep slope formed after mining is difficult to control,its water and fertilizer retention performance is poor and the nutrient composition of mine soil is low,which can not meet the needs of plant growth.Therefore,in order to restore the mine ecosystem,it is necessary to supplement the nutrients in the mine soil,and the eutrophication sediment can supplement the trace and nutrient elements necessary for plant growth in the mine ecological restoration soil.Based on the ecological restoration of limestone mine,this study takes the sediment of river and lake as the main research object,uses the rich nutrient elements in the sediment,and uses porous minerals and travertine as skeleton materials to carry out ecological restoration research of limestone mine.The emphasis is on the test of sediment related indicators,riveting root layer,transition layer,nutrient layer material ratio and nutrient characteristics,ecological restoration base material application,mine ecological restoration process research,etc.Through the preliminary experimental study,it was found that the best ratio of riveting root layer was M-2.Under the conditions of nutrient composition,moisture content,p H,strength and economic factors,g-4 is the best ratio of transition layer,y-4 is the best ratio of nutrient layer.In 2021,ecological restoration base materials should be studied,and a research project on ecological restoration of limestone mine in Wenchuan was carried out.The main construction technology is slope remediation,anchor and barbed wire laying and installation,riveting root layer,transition layer,nutrient layer preparation and spraying,late maintenance,etc.The nutrient contents in the three layers of the ecological restoration base material were different,but their contents were higher than those of the common cultivated soil,which could meet the needs of plant growth.The contents of heavy metals in mine samples were all low,which met the standard of green planting soil.In order to improve the restoration process and improve the ecological restoration rate of the mine,this study carried out the second ecological restoration study in October 2022.The main purpose of this spraying is to improve the deficiency of the first spraying and select a variety of suitable grass species.In the second spraying sample,the nutrient content was higher than that of ordinary cultivation soil,and the heavy metal content met the standard of green planting soil.