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Hydrogeological investigation and drainage infrastructure at underground zinc and lead troya mine (Gipuzkoa, Spain)

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Abstract

In 1977 a 491 m. long ramp was developed from surface into the Troya ore body. At the bottom, when the ramp had reached the ore horizon, a sudden and important water inflow from the confined karstic aquifer at the foot wall took place.

A hydrological investigation was immediatly started with the objective of defining the characteristics of the aquifer. Two main phases of the investigation were planned and completed before a drainage system could be developed:

  1. ·

    Pumping test of a surface well, drilled near the vertical of the ramp's bottom.

  2. ·

    Pumping control of the ramp drainage system and piezometry of the well.

In addition, complementary monitoring of flow, pressure, temperature and chemistry at several points in the aquifer system as well as rainfall was established.

Upon defining the main characteristics of the aquifer system where the Troya ore body is hosted, it was planned to drill wells from pumping and piezometric control. These holes also provided complementary geological and hydrogeological information.

The pumping test performed provided information of high practical value.

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Bibliography

  • FERNANDEZ-RUBIO, R.; BOTIN, J.A.; LAVANDEIRA, A.; CASTILLO MARTIN, A.; FERNANDEZ LORCA, S. and FERNANDEZ LORCA, J. 1983. Equipamientos de drenaje de la Mina de La Troya (Guipuzcoa). III Simp. Hidrog. VIII: 125–134. Madrid.

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  • FERNANDEZ-RUBIO, R.; CASTILLO MARTIN, S.; FERNANDEZ LORCA, S. and J. 1982. Drenaje de la Mina de La Troya (Mutiloa, Guipuzcoa). 88 pag. (inédito).

  • FERNANDEZ-RUBIO, R.; FERNANDEZ GUTIERREZ, R. 1980. Investigaciones hidrogeológicas en la Mina de La Troya (Mutiloa, Guipuzcoa). 47 pág. (inédito).

  • FERNANDEZ-RUBIO, R. FERNANDEZ GUTIERREZ R.; BOTIN, J.A.; LAVANDEIRA, A. 1983. Investigación hidrogeológica preliminar en la Mina de La Troya (Guipuzcoa). III Simp. Hidrog. VIII: 115–124, Madrid.

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Authors and Affiliations

  1. Department of Hydrogeology, Madrid School of Mines, Ríos Rosas, 21, Madrid, 3, Spain

    R. Fernández-Rubio

  2. EXMINESA. Mina Troya Mutiloa, Gipuzkoa, Spain

    J. A. Botin & A. Lavandeira

Authors
  1. R. Fernández-Rubio
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  2. J. A. Botin
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  3. A. Lavandeira
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Fernández-Rubio, R., Botin, J.A. & Lavandeira, A. Hydrogeological investigation and drainage infrastructure at underground zinc and lead troya mine (Gipuzkoa, Spain). International Journal of Mine Water 2, 39–56 (1983). https://doi.org/10.1007/BF02504571

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  • DOI: https://doi.org/10.1007/BF02504571

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