Abstract: Massive mining drainage has been discharged from Zibo mines, Shandong Province. It flows downslope or along channel and finally discharge into the Xiaofu River. Mining drainage lowered the pH value, raised the hardness and the contents of SO₄^2-，Fe, Al, and traceelements. Mixing process of mining drainage and the river water, the neutralization of river water and surrounding rocks, and the precipitation of Fe and Al, all these mechanisms play important roles.

Key words: mining drainage, mixing process, neutralization

摘要： 山东淄博煤矿每年排出大量的矿坑水，它们多是随地漫流或沿渠流动，最终排入孝妇河。以博山区的夏庄煤矿及整个孝妇河为研究对象，分析了矿坑排水对孝妇河的影响，矿坑排水使孝妇河水pH降低，ρ(SO₄^2-)、总硬度升高，ρ(Fe)、ρ(Al)、微量元素含量升高。影响的机理主要是矿坑排水与孝妇河水的混合作用，上游矿坑排水排入后孝妇河水与围岩的中和作用及铁铝的沉淀作用等。

关键词: 矿坑排水, 混合作用, 中和作用