Hydrochemical analysis and identification of open-pit mine water sources: a case study from the Dagushan iron mine in Northeast China

Qianling Liu,Huijie Zhang,Nengxiong Xu,Zhongjian Zhang,Wenping Mu,Yutao Li,Bin Zhang

doi:10.1038/s41598-021-02609-0

Qianling Liu, Huijie Zhang + Show 5 more

Open Access

https://doi.org/10.1038/s41598-021-02609-0

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Abstract

The identification of open-pit mine water sources is of great significance in preventing water disasters. Combined with hydrochemistry and multivariate statistical analysis, this paper systematically analyzed the hydraulic connections between aquifers and the complex seepage water sources in the pit and roadway of Dagushan iron mine through qualitative analysis and quantitative calculation. According to the hydrochemical characteristics of the study area, the causes of seepage water at different positions in the mining area were reasonably explained. The results show that there is a possible hydraulic connection or similar source of water body between the bedrock fissure aquifer and the eluvium pore aquifer. The water seepage of 2# roadway mainly comes from bedrock fissure aquifer in the north of mining area. The reason for serious water seepage in the 3# roadway and the western side of the pit is that the fault connects the shallow alluvial pore aquifer and bedrock fissure aquifer. The source of water on the southern side pit comes from the river and groundwater on the southern side of the mine. The results presented here provide significant guidance for the management of mine water seepage problems.

Highlights

The identification of open-pit mine water sources is of great significance in preventing water disasters
Identification is that a obvious difference between different aquifers exists, so they may not be applicable to water source identification of other mines
Regional hydrogeochemical controlling factors can be determined by studying hydrochemical parameters with graphical methods and ion ratio relationships[32], and the hydraulic connections between different aquifers can be determined by source information for groundwater recharge and discharge[33,34,35]

Summary

Introduction

The identification of open-pit mine water sources is of great significance in preventing water disasters. In order to ensure the safety, sustainability and economic return of underground mining, as well as to provide reasonable and effective prevention and control measures for water disasters, it is necessary to understand the hydraulic connections between different aquifers and to accurately identify the sources of open-pit mine w ater[14,15]. Relevant studies ignore the further explain the results of multivariate statistical analysis in combination with hydrochemical characteristics, which is of great significance to improve the accuracy of identifying water sources in mining areas with complex seepage characteristics

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Conclusion