Atomistry » Oxygen » Atmosphere » Mine Air
Atomistry »
  Oxygen »
    Atmosphere »
      Mine Air »

Mine Air

The Mine Air, or air in mines has been made the subject of considerable investigation. Freshly hewn coal evolves methane and other gases, and absorbs or occludes gases from the air, oxygen being taken up rather more rapidly than nitrogen. This is well exemplified by the following table which gives the relative proportions of oxygen, nitrogen,

Freshly hewn Coal.Coal exposed to Air.
Carbon dioxide1.61.18

carbon dioxide, and methane contained in samples of freshly hewn coal, and in other samples of the same coal after prolonged exposure to air.

It is not surprising, therefore, that the air of mines should exhibit a deficiency in oxygen and an increase in the percentage of carbon compounds. Analyses of air taken at different levels in a Scottish mine, are given by Whalley as follows:

Oxygen.Nitrogen.Carbon Dioxide.
Near the floor13.1382.284.56
Near the roof20.0879.20.69
Near the coal face18.9779.81.21

Last articles

Zn in 7M6U
Zn in 7NNG
Zn in 7NEE
Zn in 7NEU
Zn in 7M3K
Zn in 7KWD
Zn in 7KYH
Zn in 7KNG
Zn in 7KY2
Zn in 7KYF
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy