Tracer Gas Methods for Measuring Leakage Through Mine Stoppings.
Matta-JE; Maksimovic-SD; Kissell-FN
NTIS: PB 289 864 :10 pages
The Bureau of Mines has developed a tracer gas method for measuring leakage through permanent mine stoppings. In this method, a temporary brattice is erected in the same entry as the leaking permanent stopping. Leakage was evaluated from concentration measurements of a tracer gas introduced into the space between the stopping and brattice. Stopping leakages ranging from 15 cfm to 265 cfm were simulated in an underground coal mine. Leakage values determined by the new method were within 10 pct of the known values.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 289 864