By Pradipta Kumar Deb
An advent to Mine Hydrogeology briefly describes the topic of hydrogeology in order that this data may be built-in into mine improvement making plans. It emphasizes not just the hydrochemical but additionally the actual affects of the hydrogeological setting at the mine and its atmosphere. additional, it discusses the methodologies utilized in mine hydrogeological reports, showcased via chosen experiences on Indian mines.
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Extra resources for An Introduction to Mine Hydrogeology
This can be seen as a short term measure to mitigate the problem. Long term hydrogeological planning is required to be in place in order to replenish groundwater table of the area. In opencast mines where battery of wells have been sunk to dewater the mines, pumped out water should be supplied to the nearby villages. Such measures have been taken in the Neyveli lignite mines (vide Raghunath H. , Groundwater). Wherever, mine water is contaminated due to the effect of mining, chemical analysis of mine water should be done and proper remediation measures as per standard procedures should be taken (vide Younger et al.
Aquifers may be sand and sandstone, limestone or Karstic limestone, highly fractured hard rocks like crushed quartzites basalt or granites. Confining materials on top and bottom of the aquifers like clay or shale beds are to be identified which acts as a confining medium and makes the aquifer confined or artesian one. For a running open cast mine, some times mine gets flooded by inrush of ground water flow hindering mining operation. In such cases, on the pit floor, a sump is made where water is allowed to percolate in it and being pumped out.
Extraction of different minerals is known to lead to water pollution due to heavy metal, acid discharges and increased suspended solids. Deep underground mines directly affect the water table or piezometric surface of the area. However, the impact of mining project on hydrogeology and surface water hydrology are site specific and depends upon the characteristics of the mines hydrogeology and requirement of ground water for other uses. The anticipated impact on hydrogeology of the mining area may be as under: 1.