Abstract
Previously proposed discriminant methods cannot accurately identify water sources in a complex multiaquifer mine. Based on statistical analysis of the water chemistry of samples collected at the Xinji no. 2 multiaquifer coal mine, a comprehensive stepwise discriminant method was proposed for this purpose. Characteristic ion contrast and ion proportional coefficients were applied to aquifers with distinct chemical characteristics to establish a characteristic index discrimination system. Aquifers with small differences in water chemistry were identified by the Fisher discriminant method. Different methods (first simple ones, followed by more complex ones) were used to distinguish the water sources of different aquifers. This approach enabled us to identify water sources for the Xinji no. 2 mine and should be tried for other sites with similar hydrogeological conditions.
Zusammenfassung
Bisher vorgeschlagene Diskriminanzmethoden können in komplexen, mehrere Grundwasserleiter betreffenden Bergwerken keine akkurate Identifizierung von Wasserquellen liefern. Basierend auf der statistischen Analyse des Chemismus von Wasserproben, die im Multi-Aquifer-Bergwerk Xinji Nr. 2 gesammelt wurden, wurde eine umfassende, schrittweise Diskriminanzmethode für diesen Zweck vorgeschlagen. Charakteristischer Ionen-Kontrast und Ionen-Anteil-Koeffizienten wurden für Grundwasserleiter mit bestimmten chemischen Charakteristika benutzt, um ein Unterscheidungssystem mit charakteristischen Indizes zu erstellen. Grundwasserleiter mit kleinen Unterschieden im Wasserchemismus wurden mit der Fischer-Diskriminanten-Methode unterschieden. Unterschiedliche Methoden (zunächst einfache, gefolgt von komplexeren) wurden benutzt, um Wasserquellen unterschiedlicher Grundwasserleiter zu unterscheiden. Dieser Ansatz erlaubte, die Quellen des Wassers im Bergwerk Xinji Nr. 2 zu identifizieren und sollten für andere Bergwerke mit ähnlichen hydrogeologischen Bedingungen getestet werden.
Resumen
Los métodos discriminantes propuestos anteriormente no pueden identificar con precisión las fuentes de agua en una mina compleja con varios acuíferos. Basándose en el análisis estadístico de la química del agua de las muestras recogidas en el Xinji N°2 de la mina de carbón multiacuífera, se propuso un método discriminante exhaustivo por etapas para este propósito. Se aplicaron los coeficientes de contraste iónico característico y proporcional a los iones a los acuíferos con características químicas distintas para establecer un sistema de discriminación de índice característico. Los acuíferos con pequeñas diferencias en la química del agua se identificaron mediante el método discriminante de Fisher. Se utilizaron diferentes métodos (primero los simples seguidos de otros más complejos) para distinguir las fuentes de agua de los diferentes acuíferos. Este enfoque permitió identificar las fuentes de agua para el Xinji N°2 y debe probarse para otros sitios con condiciones hidrogeológicas similares.
综合逐步判别法识别矿井含水层组水源
以往水源判别法不能准确识别复杂含水层条件矿井水源。基于新集二矿含水层组水化学成分统计, 提出了综合逐步判别法。对于水化学特征明显的含水层, 用特征离子对比和离子比例系数建立判别特征指数。对于水化学特征差异较小的含水层, 用Fisher判别法进行区分。采用不同方法(先简单, 再复杂)区分不同含水层水源。这套方法使我们能够识别新集二矿水源, 也可尝试用于其它水文地质条件相似矿井。
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Acknowledgements
Our deepest gratitude goes to the editors and anonymous reviewers for their careful work and thoughtful suggestions that helped improve this paper substantially. The authors also gratefully acknowledge the financial support of the National Natural Science Foundation of China (41602310) and China Postdoctoral Science Foundation (2017M611044).
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Jiang, C., An, Y., Zheng, L. et al. Water Source Discrimination in a Multiaquifer Mine Using a Comprehensive Stepwise Discriminant Method. Mine Water Environ 40, 442–455 (2021). https://doi.org/10.1007/s10230-020-00742-2
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DOI: https://doi.org/10.1007/s10230-020-00742-2