<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The mining of underground deposits causes the inflow of water to workings and the necessity of pumping them to the surface. The mining plant of KGHM Polska Miedź S.A. extracts copper ore in plant branches with different hydrogeological conditions. The inflowing water into the workings is characterised by variable mineralisation, which depends on the location of the branch. In the south-western part of the deposit, a low-mineralised stream with a relatively high flow rate can be observed, while the outflow of highly saline waters occurs in the north-eastern branch. Despite the activities undertaken that aim at using the pumped-off mine waters industrially, it is necessary to deposit them into the Odra River.</p>
<p>Reducing the environmental impact on the Odra River is one of KGHM's goals, which is being implemented by stabilising its salt concentration at a safe level. The paper presents the results of a 3D simulation of brine plume propagation based on a numerical model of advection–diffusion and turbulent flow. Bathymetric data from a section of the river approximately 500 m long and point data from an Odra water quality test were used to develop and validate the model. The paper discusses the types of factors that minimise the impact of brine discharge. The developed model will be used in the future to propose solutions that accelerate the mixing of mine waters with the waters of the Odra River.</p>
</abstract>

The mining of underground deposits causes the inflow of water to workings and the necessity of pumping them to the surface. The mining plant of KGHM Polska Miedź S.A. extracts copper ore in plant branches with different hydrogeological conditions. The inflowing water into the workings is characterised by variable mineralisation, which depends on the location of the branch. In the south-western part of the deposit, a low-mineralised stream with a relatively high flow rate can be observed, while the outflow of highly saline waters occurs in the north-eastern branch. Despite the activities undertaken that aim at using the pumped-off mine waters industrially, it is necessary to deposit them into the Odra River.
Reducing the environmental impact on the Odra River is one of KGHM's goals, which is being implemented by stabilising its salt concentration at a safe level. The paper presents the results of a 3D simulation of brine plume propagation based on a numerical model of advection–diffusion and turbulent flow. Bathymetric data from a section of the river approximately 500 m long and point data from an Odra water quality test were used to develop and validate the model. The paper discusses the types of factors that minimise the impact of brine discharge. The developed model will be used in the future to propose solutions that accelerate the mixing of mine waters with the waters of the Odra River.

Numerical analysis of the transport of brine in the Odra River downstream of a mine's discharge

Wroclaw University of Science and Technology

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution 4.0 International License.

The mining of underground deposits causes the inflow of water to workings and the necessity of pumping them to the surface. The mining plant of KGHM Polska...

Numerical analysis of the transport of brine in the Odra River downstream of a mine's discharge

Article Category: Original Study

Published Online: Dec 22, 2021

Page range: 366 - 379

Received: Oct 23, 2021

Accepted: Nov 19, 2021

DOI: https://doi.org/10.2478/sgem-2021-0036

Keywords
Water quality, mining, wastewater management, brine, dilution, numerical modelling, CFD

© 2021 Szymon Zieliński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Numerical analysis of the transport of brine in the Odra River downstream of a mine's discharge

Article Category: Original Study

Published Online: Dec 22, 2021

Page range: 366 - 379

Received: Oct 23, 2021

Accepted: Nov 19, 2021

DOI: https://doi.org/10.2478/sgem-2021-0036

KeywordsWater quality, mining, wastewater management, brine, dilution, numerical modelling, CFD

© 2021 Szymon Zieliński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Water quality, mining, wastewater management, brine, dilution, numerical modelling, CFD