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Application of 3D numerical simulations to forecast mine seepage and groundwater flow conditions with respect to progressive coal mining activity

Author

Listed:
  • Rambabu Singh

    (Central Mine Planning and Design Institute Limited)

  • N. Srinivasa Rao

    (CGWA Accredited Ground Water Consultant)

  • I. D. Narayan

    (Central Mine Planning and Design Institute Limited)

  • Nitish Kumar

    (Central Mine Planning and Design Institute Limited)

  • T. Doley

    (Central Mine Planning and Design Institute Limited)

  • D. Bandyopadhyay

    (Central Mine Planning and Design Institute Limited)

  • D. K. Kisku

    (Central Mine Planning and Design Institute Limited)

Abstract

The study aims to simulate the stage-wise, year-wise mine seepage predictions and the corresponding impact on the groundwater regime (drawdown and heads) in accordance with the approved mine plan for certain coal mines in Central India. To that end, the optimized and efficient watershed area of 997.61 km2 has been delineated by using ArcGIS software and was synthesized in a finite difference numerical model with the concept of 21 layers (multi-layered aquifer system) encompassing six working mines. Initially, the groundwater-flow model was constructed for the simulation of groundwater conditions during May 2022 which shows a good model fit of the observed and simulated water levels, with the majority of the data lying close to the 1:1 line as indicated by an RMS value of less than 5 m. Then, the zone budget of different forecast scenarios reveals that the inflows into the various mine excavation area are: 13,733 (Gevra OC), 12,732 (Kusmunda OC), 8569 (Dipka OC), 8308 (Surakchar UG), 8018 (Manikpur OC), and 7511 (Balgi UG) m3/day. The zone of influence defined by zero drawdown extends up to 1.22 km to the NW of Kusmunda OCP, 2 km to the east of Dipka OCP, and 1.25 km to the SW from the quarry surface boundary of Gevra OCP and is negligible, i.e. up to

Suggested Citation

  • Rambabu Singh & N. Srinivasa Rao & I. D. Narayan & Nitish Kumar & T. Doley & D. Bandyopadhyay & D. K. Kisku, 2024. "Application of 3D numerical simulations to forecast mine seepage and groundwater flow conditions with respect to progressive coal mining activity," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 26(9), pages 22367-22388, September.
    • Handle: RePEc:spr:endesu:v:26:y:2024:i:9:d:10.1007_s10668-023-03556-8
    DOI: 10.1007/s10668-023-03556-8
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