Characteristics of heavy metals release from coal waste and potential ecological risk assessment of contaminated soil around coal waste piles were studied.The results showed that:(1)Residual fraction was the main fraction of heavy metal in coal waste,such as Cu,Zn,Pb,Cr and Cd accounted for 56.86%,53.27%,72.01%,68.61% and 75.93%,which could not easily release from coal waste,but few acid soluble fraction and oxidizable fraction could release and contaminate the soil;(2)Soil heavy metal contents decreased wi...