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The Effect of Atmospheric Pressures on the Oxygen Level in a Sealed Mine.
NTIS: PB 208 008 :19 pages
The atmosphere in part of an air-sealed coal mine was monitored continuously through a drill hole for oxygen content to determine (1) the effectiveness of sealing a mine against the entrance of air and (2) the major force that caused the phenomenon of mine breathing through the overburden. The differential pressure across the seal and the barometric pressure on the outside also were recorded. A general correlation, obtained between the oxygen level, differential pressure, and barometric pressure, indicates that changes in air pressure are the cause for periodic replenishment of the oxygen in the mine. Mine effluent quality was determined by conditions in many sections of the mine and could not be related to the oxygen level at the drill hole.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 208 008
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division