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Ground Water Control Techniques for Safe Exploitation of the Neyveli Lignite Deposit, Cuddalore District, Tamil Nadu, India

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Abstract

Dewatering in deep opencast mines generally focuses on extraction of seepage water from the phreatic zones above the ore/mineral deposits and storm water that collects in mine pits. But at the Neyveli lignite deposit in the Cuddalore District, there was a danger of the mine floor bursting due to the hydrostatic head pressures in the underlying thick confined aquifers, a problem not previously encountered anywhere in India. Hydrogeological studies established the feasibility of mining the lignite by maintaining a constant cone of depression (pressure relief) in the surrounding aquifers below the mine by continuous pumping through a pre-planned network of wells. This depressurizing process had to be designed to tackle multi-layered confined aquifers and water table conditions. This paper traces the multi-faceted evolution in developments to control ground water at the Neyveli Mines.

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Acknowledgments

The authors gratefully acknowledge the management of Neyveli Lignite Corporation for permitting the use of the available technical data and permission to publish this paper.

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Authors and Affiliations

  1. Neyveli Lignite Corporation Ltd, Neyveli, TN, 607 802, India

    K. S. Anandan, S. N. Sahay, T. K. Ramabadran & S. Shiv Prasad

Authors
  1. K. S. Anandan
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  2. S. N. Sahay
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  3. T. K. Ramabadran
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  4. S. Shiv Prasad
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Correspondence to S. Shiv Prasad.

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Anandan, K.S., Sahay, S.N., Ramabadran, T.K. et al. Ground Water Control Techniques for Safe Exploitation of the Neyveli Lignite Deposit, Cuddalore District, Tamil Nadu, India. Mine Water Environ 29, 3–13 (2010). https://doi.org/10.1007/s10230-009-0089-1

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  • DOI: https://doi.org/10.1007/s10230-009-0089-1

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