title: A study of leakage rates through mine seals in underground coal mines.
abstract: The National Institute for Occupational Safety and Health conducted a study on leakage rates through underground coal mine seals. Leakage rates of coal bed gas into active workings have not been well established. New seal construction standards have exacerbated the knowledge gap in our understanding of how well these seals isolate active workings near a seal line. At a western US underground coal mine, we determined seal leakage rates ranged from about 0 to 0.036 m3/s for seven 340 kPa seals. The seal leakage rate varied in essentially a linear manner with variations in head pressure at the mine seals.
authors: NIOSH, Pittsburgh, PA, USA.
authors: Steven J
authors: SJ
authors: Schatzel
authors: West Virginia University, Morgantown, WV, USA.
authors: Robert B
authors: RB
authors: Krog
authors: NIOSH, Pittsburgh, PA, USA.
authors: Andrew
authors: A
authors: Mazzella
authors: NIOSH, Pittsburgh, PA, USA.
authors: Cynthia
authors: C
authors: Hollerich
authors: NIOSH, Pittsburgh, PA, USA.
authors: Elaine
authors: E
authors: Rubinstein
keywords: coal bed emissions; coal mining; mine safety; mine seals; mine ventilation