偏碱性矿井水演化过程中的水岩作用

针对中国淡水资源相对贫乏、煤矿开采不同程度地使水资源受到污染的现状,以阜新矿区为例,应用水文地 质学和水文地球化学原理,研究煤矿开采条件下偏碱性矿井水演化过程中的水岩作用。结果表明:地层为碱性岩 石和煤层含硫量偏低使矿井水酸碱度大于7,呈偏碱性。偏碱性条件使铁离子质量浓度降低,同时促进了氨氮硝化 反应进行,使矿井水中硝酸盐和亚硝酸盐质量浓度增加。偏碱性条件也可能是造成氟质量浓度超标的主要原因。 煤岩层地球化学特征是本地区偏碱性矿井水形成的基础,水岩作用对矿井水各组分的变化具有重要影响。

Water-Rock Interaction During Evolution of Alkalescent Coal Mine Drainage

Because fresh water resource is relatively shorter in China and the water resource has been polluted in certain degrees by the coal mining,the water-rock interaction during the evolutiont of the alkalescent coal mining drainage in the coal mining condition of Fuxin mining areas is studied according to the principle of hydrogeology and hydrogeochemistry. The results show that the alkali properties of the rock and low sulfur content of coal make drainage pH is bigger than 7, that shows alkalescent. The alkalescent condition reduces the mass concentration of iron ions and fastens the nitration reaction of ammonia nitrogen, and leads to the concentration of nitrate. It is thought that the property of drainage maybe the main reason that fluorin ions concentrate beyond the standard. Therefore the rock mass geochemistry characteristic is the main reason that forms the alkalescent coal mine drainage in this area, and water-rock interaction has an important impact on the component change of the coal mine drainage.