唐山地区采煤沉陷区矸石充填复垦安全性分析

Safety analysis of mining subsided reclamation with coal gangue in Tangshan

利用矸石充填复垦是平原矿区采煤沉陷地复垦耕地的常用方法之一,但矸石充填复垦用于农业种植的土体污染问题受到广泛关注。文中通过对矸石充填土壤剖面中涉及食品安全的典型污染元素Cd、Cr、Cu、Ni、Pb进行了研究。结果表明,唐山地区煤矸石作为充填材料复垦耕地对土壤层不存在重金属污染风险,可用于农作物种植。

The reclamation of coal gangue was one of the most commonly used methods in the plain mining subsidence area. However, the problem of soil pollution caused by gangue filling and reclamation was widely concerned. In the paper, the typical pollution elements, Cd, Cr, Cu, Ni and Pb, relating to food safety in soil profile were studied. Results showed that the coal gangue in Tangshan, as a filling material, did not have the risk of heavy metal pollution to the soil. Restored land filled with coal gangue could be used for the agricultural cultivation.