Ventilation: Air flows from a region of high pressure to a region of low pressure. The difference of pressure may be caused by (1) purely Natural means and (2) Fan called Mechanical Ventilation.
Mine Lighting: In underground insufficient light over long periods impairs the efficiency of the miner and also develops an eye disease known as Nystagmus. For lighting in underground electric cap lamps are used by every underground worker.
Friday, August 29, 2008
Mining & Nature
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