Analysis of Water Control in an Underground Mine Under Strong Karst Media Influence (Vazante Mine, Brazil)

Citation

Material Information

Title:
Analysis of Water Control in an Underground Mine Under Strong Karst Media Influence (Vazante Mine, Brazil)
Series Title:
Hydrogeology Journal
Creator:
Ninanya, Hugo
Guiguer, Nilson
Vargas Jr., Eurípedes A.
Nascimento, Gustavo
Araujo, Edmar
Cazarin, Caroline L.
Publisher:
Springer Nature
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Numerical Analysis ( local )
Karst ( local )
Mining ( local )
Brazil ( local )
Groundwater/Surface-Water Relations ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
This work presents analysis of groundwater flow conditions and groundwater control measures for Vazante underground mine located in the state of Minas Gerais, Brazil. According to field observations, groundwater flow processes in this mine are highly influenced by the presence of karst features located in the near-surface terrain next to Santa Catarina River. The karstic features, such as caves, sinkholes, dolines and conduits, have direct contact with the aquifer and tend to increase water flow into the mine. These effects are more acute in areas under the influence of groundwater-level drawdown by pumping. Numerical analyses of this condition were carried out using the computer program FEFLOW. This program represents karstic features as one-dimensional discrete flow conduits inside a three-dimensional finite element structure representing the geologic medium following a combined discrete-continuum approach for representing the karst system. These features create preferential flow paths between the river and mine; their incorporation into the model is able to more realistically represent the hydrogeological environment of the mine surroundings. In order to mitigate the water-inflow problems, impermeabilization of the river through construction of a reinforced concrete channel was incorporated in the developed hydrogeological model. Different scenarios for channelization lengths for the most critical zones along the river were studied. Obtained results were able to compare effectiveness of different river channelization scenarios. It was also possible to determine whether the use of these impermeabilization measures would be able to reduce, in large part, the elevated costs of pumping inside the mine.
Original Version:
Hydrogeology Journal, Vol. 26, no. 7 (2018-05-21).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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