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In order to study the characteristics of heavy metals of the groundwater in the gangue-filled reclamation area, the heavy metals were investigated at Ju-Ji Coal mine with high groundwater level. The samples of the groundwater were gathered in the gangue-filled reclamation area at different time, studying the .characteristics of heavy metals of the groundwater. The results were as follows: the heavy metal content of the Cd, Hg, As and Pb increased with the increase of reclamation time. The heavy metal content of groundwater associated with the reclamation time in linear time. The coal mining of Juji is in the city of Yongcheng, which is located in the high groundwater level of plain area. The coal mining of Juji takes reclamation technique in the process of reclamation, which is striping topsoil and filling coal gangue and then covering soil with 60cm on the coal gangue in subsidence area. At the same time, we lay two monitoring wells in reclamation area to monitor the contamination of the groundwater's heavy metals. Before reclamation, the area is the basic farmland which has no heavy metal contamination. The elevation of underground water level in the reclamation area is below the waste rock filling layer.

The Characteristics of Heavy Metals of the Groundwater in the Gangue-filled Reclamation Area