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The potential use of mine water for a district heating scheme at Caerau, Upper Llynfi valley, South Wales, UK

View ORCID ProfilePeter Brabham, Manju Manju, Hywel Thomas, Gareth Farr, Robert Francis, Ramsha Sahid and View ORCID ProfileSivachidambaram Sadasivam
Quarterly Journal of Engineering Geology and Hydrogeology, 53, 145-158, 12 December 2019, https://doi.org/10.1144/qjegh2018-213
Peter Brabham
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Writing - Original Draft (Lead)]
  • Find this author on Google Scholar
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  • ORCID record for Peter Brabham
  • For correspondence: brabham@cardiff.ac.uk
Manju Manju
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Project administration (Lead)]
  • Find this author on Google Scholar
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Hywel Thomas
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Funding acquisition (Lead)], [Validation (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Search for this author on this site
Gareth Farr
2British Geological Survey, Cardiff University, Park Place, , UK
Roles: [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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Robert Francis
3Carreg Las Ltd, 46 Glasfryn Road, Pontarddulais, , UK
Roles: [Project administration (Equal)]
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Ramsha Sahid
4School of Earth and Ocean Sciences, Cardiff University, , UK
Roles: [Formal analysis (Supporting)]
  • Find this author on Google Scholar
  • Search for this author on this site
Sivachidambaram Sadasivam
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Formal analysis (Supporting)]
  • Find this author on Google Scholar
  • Search for this author on this site
  • ORCID record for Sivachidambaram Sadasivam
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Abstract

The feasibility of recovering heat energy from mine water contained within an abandoned coal mine in South Wales is assessed for a proposed district heating scheme. The study area is the village of Caerau, in the Upper Llynfi valley, Bridgend County Borough, South Wales, UK, comprising around 750 residential houses, a primary school and 17 commercial properties. This paper describes an archival geological and mining desk study focused on Caerau colliery, consideration of regional mine linkages, geographical information system (GIS) techniques used to create a 3D initial conceptual geological mine model of Caerau workings, permitting and licencing requirements, community engagement activities undertaken and the findings of a single exploratory borehole. The borehole intersected a void space in flooded mine workings around the horizon of the Six Foot seam at a depth of 224 m below ground level, as predicted by the conceptual mine model. The rest water level within the borehole lies at 92 m below ground level and the measured in situ temperature of the mine water at the base of the borehole was 20.3°C. An unexpectedly high and sustained geothermal gradient of c. 53°C km−1 was calculated from repeated measured temperature profiles.

Thematic collection: This article is part of the Keeping lessons alive in engineering geology collection available at https://www.lyellcollection.org/cc/keeping-lessons-alive-in-engineering-geology

  • © 2019 The Author(s). Published by The Geological Society of London. All rights reserved
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Quarterly Journal of Engineering Geology and Hydrogeology: 53 (1)
Quarterly Journal of Engineering Geology and Hydrogeology
Volume 53, Issue 1
February 2020
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The potential use of mine water for a district heating scheme at Caerau, Upper Llynfi valley, South Wales, UK

Peter Brabham, Manju Manju, Hywel Thomas, Gareth Farr, Robert Francis, Ramsha Sahid and Sivachidambaram Sadasivam
Quarterly Journal of Engineering Geology and Hydrogeology, 53, 145-158, 12 December 2019, https://doi.org/10.1144/qjegh2018-213
Peter Brabham
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Writing - Original Draft (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Peter Brabham
  • For correspondence: brabham@cardiff.ac.uk
Manju Manju
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Project administration (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Hywel Thomas
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Funding acquisition (Lead)], [Validation (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Gareth Farr
2British Geological Survey, Cardiff University, Park Place, , UK
Roles: [Formal analysis (Equal)], [Investigation (Equal)], [Methodology (Equal)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Robert Francis
3Carreg Las Ltd, 46 Glasfryn Road, Pontarddulais, , UK
Roles: [Project administration (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Ramsha Sahid
4School of Earth and Ocean Sciences, Cardiff University, , UK
Roles: [Formal analysis (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Sivachidambaram Sadasivam
1Geoenvironmental Research Centre, School of Engineering, Cardiff University, , UK
Roles: [Formal analysis (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Sivachidambaram Sadasivam

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The potential use of mine water for a district heating scheme at Caerau, Upper Llynfi valley, South Wales, UK

Peter Brabham, Manju Manju, Hywel Thomas, Gareth Farr, Robert Francis, Ramsha Sahid and Sivachidambaram Sadasivam
Quarterly Journal of Engineering Geology and Hydrogeology, 53, 145-158, 12 December 2019, https://doi.org/10.1144/qjegh2018-213
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  • Article
    • Abstract
    • Overview of heat recovery schemes from abandoned coal mines
    • Geographical and geological setting
    • Historical Llynfi valley regional mining
    • The local geological stratigraphy at Caerau
    • Caerau colliery 3D conceptual geological and coal mining model
    • Groundwater rebound and historical mine pumping data
    • Identifying drilling location for test borehole
    • Environmental permits, exemptions and licences
    • Community engagement activities
    • Results of exploration drilling
    • Mine water temperature and the local geothermal gradient
    • Mine water chemistry
    • Assessment of the potential mine water reservoir at Caerau
    • Discussion and conclusions
    • Acknowledgements
    • Funding
    • Author contributions
    • References
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