Abstract

Taking Shaanxi Tongchuan Cui Home Gully coal gangue as an example. The paper study on the migration law of heavy metal elements of open pit waste dump in surrounding soil by measuring and analyzing the contents of heavy metal elements which are Cu, Cr, Zn, Pb, Cd. The results show that: firstly, the elements contents of Cu, Cr, Zn, Pb are under the national secondary soil quality standard, but the content of Cd is above the national secondary soil quality standard, the single index of Cd is 3.03,this mean that the pollution is serious, so the situation should be pay more attention; secondly the contents of five heavy metals elements mainly accumulated in the range of 0~40cm soil profile in vertical direction, with the soil depth increase ,the contents of five heavy metals decrease, and when the soil depth is under 60m, the pollution reach stable state; thirdly, with the horizontal distance to coal gangue increase, the content of heavy metals which are Cu, Cr, Pb, Cd (soil depth is 5~20cm) decrease, but with the horizontal distance to coal gangue increase ,the content of Zn is much higher than other elements.

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