谢桥矿地下水化学特征分析与水源识别研究

摘要

The groundwater chemistry characteristics and hydrogeochemical patterns of the main aquifers of Xieqiao Mine were analyzed in this paper with Piper graphic method,the spatial distribution of four main ions of coal-seam water was analyzed in vertical,and water samples were identified with Bayes dis-criminant method.The results showed that the Cenozoic top aquifer has low Cl-concentration with types of HCO3-Na +K・ Ca.Cenozoic middle aquifer is Cl-Na +K type water,coal-seam water varies wide in HCO 3 ,with types of Cl-Na +K and HCO3 ・ Cl-Na +K type water,the water in Taiyuan group limestone and Ordovician limestone is mainly Cl-Na +K type.Shallow coal-seam water near the strata outcropped is recharged by the other aquifers.Bayes discriminant can correctly identify 75% of water samples,and the overall identification effect is well.%采用 Piper 图示法分析了谢桥矿主要含水层的地下水化学特征和水质类型，研究了煤系水水质在垂向上的变化特征，并利用贝叶斯判别方法识别矿井水样来源。研究结果显示：谢桥矿新生界上含水 Cl －浓度低，水质类型为 HCO3－Na ＋K・ Ca 型水；新生界中含水为 Cl－Na ＋K 型水；煤系水沿 HCO－3方向分布范围较广，水质类型主要为Cl－Na ＋K 和 HCO3・ Cl－Na ＋K 型水；太灰水和奥灰水为 Cl－Na ＋K 型水；浅部煤系水在地层出露处附近受到其他含水层的补给；贝叶斯判别结果显示判别正确率为75％，总体判别效果较好。