【摘要】 以平顶山矿区为例,将煤矸石破碎或4种不同粒径进行连续淋溶实验,模拟其矿井充填后对地下水环境的影响。测定pH值、电导率、氟、总硬度、锌、锰、镉、铬、铜、铅等项目。在实验条件下,矸石溶出液中氟和锰超标,铅偶有超标,pH偏碱性,对地下水环境存在一定影响。且粒径越小,越利于组分溶出。其它组分溶出量少,多未检出。实验表明,煤矸石不属于危险废物,充填是可行的,但必须采取控制措施。更多还原

【Abstract】 The leaching experiments of four kinds of broken gangues with different particle diameters from Pingdingshan coal mining region were carried out to simulate the impact of gangue filled in mined-out area on the underground water environment, in which the leaching solution’s pH value,conductivity total hardness,and F,Zn,Mn,Cd,Cr,Cu and Pb contents were measured.Under the condition of experiment,in the leaching solution,the contents of F and Mn exceeded the standards,Pb can be detected occasionally and pH value is on the high side of the standard,so the leaching solution may pollute underground water.The experiments showed that the smaller the particles of gangue are,the easier the leaching is,the contents of other heavy metals were very few and even cann’t be detected,gangue does not belong to dangerous solid waste,and gangue filling is possible when strict control measures are adopted.更多还原