Study On Reclamation Soils With Different Filled Materials In Huainan Mine

At present, fly ash and coal gangue filled reclamation technology has been more applicated in China. However, the physicochemical properties of fly ash and coal gangue itself and contains a number of toxic and harmful substances, can cause adverse effects and potential pollution of the reclaimed land fertility, Not only affects the crop yield harvest, but also affect the safety of the reclaimed land grain. This paper takes Huainan Panyi coal gangue filled reclamation area and Shangyao fly ash filled reclamation area as the study areas, analysising physicochemical properties and heavy metal pollution situation of different reclamation technology of reclamation land soil and filling itself, and comparative analysis and correlation to explore the soil remediation rules, Suit one’s measures to local conditions for providing scientific basis for coal mining subsidence land reclamation technology and accelerate the selection of reclamation land soil remediation, in view of the Huainan coal mine subsidence land reclamation ecological reconstruction to provide basic data. The results show that:1.Fly ash and coal gangue filled reclamation soil are alkaline soil, organic matter, hydrolytic nitrogen content is low, particularly in fly ash reclaimed soil; The available P and available K in the fly ash reclaimed soil was higher than that in the contrast soil, then low in the coal gangue reclaimed soil; Overall, consistent with the physical and chemical properties of coal gangue and fly ash themselves.2.Cu, Ni of fly ash reclaimed soil than that in coal gangue reclaimed soil, Cr, Zn, Pb, Cd are lower than those of coal gangue reclaimed soil, the content of Zn, Cr lower than the background value of soil in Huainan, The contents of six kinds of heavy metal elements in coal gangue reclaimed soil are beyond the background value in Huainan. The Cr, Zn, Cd content of coal gangue reclamation soil of the environmental quality of soil pose a threat, especially Cd. While the Cd content of fly ash reclaimed soil in the state of soil within two standard range, but is much higher than the background value of soil in Huainan and China soil background value, constitutes a threat to soil environmental quality.3.The pH of coal gangue reclaimed soil correlations between heavy metals content is very small, except for Pb, with other five kinds of heavy metals as a positive correlation, six kinds of heavy metal elements are positively correlated to each other, organic matter has a certain influence on the Cu, Cr, Zn.The pH of fly ash reclaimed soil with a of six kinds of heavy metals showed negative correlation. Zn, Cr, Cd and Cu, Pb, Ni two groups of elements are positively correlated, influence of organic matter on the Cr and Cu greatly.