谢桥矿区采煤塌陷积水区环境效应分析

Analysis on environmental impact of Xieqiao coal mining subsided water area

采煤塌陷水域是淮南矿区一种特殊地表水体。选择了具有代表性的有一定塌陷时间的谢桥矿塌陷水域,监测分析其水质理化指标、常规离子和重金属元素。结果表明:塌陷水域水质状况具有季节性变化。水域受到了一定程度的污染,DO丰富,COD含量偏高,水域呈弱碱性,pH值较为稳定,部分理化指标随时间增长有累计效应。常规离子含量顺序为HCO3->Mg2+>SO42->Ca2+>Cl->Na+>K+>F-。与国家地表水质量标准(GB3838-2002)比较,水域重金属元素除了Hg严重超标外,其他As、Se、Cd、Cr、Cu、Pb、Zn等均不超标,未对水域构成重金属污染。通过对谢桥矿区塌陷水域水质进行分析评价,为其及周边矿区塌陷水域综合应用提供了一定的理论依据。

Coal mining subsided water area is special component of the surface water in Huainan mining area. Xieqiao mining area with certain subsidence time which is a representative of Huainan coal mining areas is chosen to monitor and analyze the physieochemical indexes, conventional ions and heavy metal elements. The measured results show that the water area has seasonal variations. The water area has been polluted in some degree. DO is rich, COD is higher than normal level, the water is weak basic, pH is steady and some physicochemical indexes have accumulative effect with time increasing. The order of conventional ions content is HCO3^- 〉Mg2^＋ 〉SO4^2- 〉Ca^2＋ 〉Cl^- 〉Na^＋ 〉K^＋ 〉F^-. Compared with Standard of Environment Quality of National Surface Water （GB3838-2002） , Hg is beyond the standard seriously while other heavy metals such as As,Se, Cd,Cr,Cu,Pb,Zn didn＇t exceed the standard. The subsided water area is not polluted by heavy metal elements. The theoretical basis about application of the water is provided through analysis of Xieqiao subsided water area.