通过对自然风化前后煤矸石微量重金属元素(Cd,Cu,Mo,Pb和Zn)含量与赋存状态的分析和研究发现:煤矸石的自然风化过程是一个微量重金属的富集过程.在这个过程中,以硫化物矿物存在的微量重金属随着硫的氧化而分解.但是,由于已风化煤矸石表面有机质和铁的胶体的存在,这些重金属元素没能迁移到周围环境中去,而是保留在煤矸石的残余构架中.这样,就微量重金属的污染而言,煤矸石对周围环境的影响是有限的. Through the analysis and research on the content and occurrence of trace heavy metal elements (Cd, Cu, Mo, Pb and Zn) in coal gangue before and after natural weathering, the natural weathering process of coal gangue is a trace heavy metal enrichment process.In this process , Trace amounts of heavy metals present as sulfide minerals decompose with the oxidation of sulfur.But due to the presence of colloidal organic matter and iron on the weathered coal gangue, these heavy metal elements do not migrate into the surrounding environment but remain in the Coal gangue residual framework.Thus, in terms of trace heavy metal pollution, coal gangue on the surrounding environment is limited.