大型露天煤矿重金属污染评价

Evaluation of Heavy Metal Pollution in Large Opencast Mine

大型露天煤矿开采强度大,对周围环境破坏较大,特别是重金属元素由地下深部转至地表,改变了它们迁移的地球化学条件,在地表重新分布,形成了局部地区的严重污染。通过对胜利露天煤矿5号煤层上覆岩层的重金属含量及赋存状态的调查,得到该矿重金属Cd的含量已经超标,是本地区土壤重金属污染的主要因子。

Since opencast mines have large mining intensity, they destroy the environment more seriously, especially when the heavy metals have been transformed from the deep level to the surface. As a result, the heavy metals were redistributed on the surface and can cause serious pollution in parts of an area due to the change of geochemistry conditions for their migration. Thorough the investigation of the heavy metals contents and their occurrence condition in the overburden formation of No.5 Coal Seam at Shengli Opencast Mine, it was concluded that the content of the heavy metal cadmium (Cd) exceeded its normal content, so it is the main factor of soil pollution by heavy metals in this area