|Document ID (ISN)||55225|
|ISSN - Serial title
||0041-5804 - Ugol' Ukrainy
|Convention or series no.
||Vasil'ev N.F., Hohlov N.N.
||Detection of underground fires by carbon monoxide (CO) concentration change monitoring in return ventilation streams
||Obnaruženie podzemnyj požarov po izmeneniju koncentracii okisi ugleroda v ishodjaščih strujah vozduha [in Russian]|
||Dec. 1988, No.12, p.35. Illus. 3 ref.
||The proposed Soviet system, SIGMA-SO, is based on the continuous monitoring of CO levels in coal mine return ventilation streams, with data presentation on a recorder chart. CO build-up may result from a multitude of factors other than a fire, such as coal or wood oxidation, mining processes (blasting, coal transport, etc.), spontaneous combustion of coal, etc. An equation obtained for deriving total CO levels in return air as a sum of different variables, has thus to be computer-processed in order to eliminate the interfering factors, (a) mean CO level does not exceed the mine's natural background of the working being monitored, a seat of fire is non-existent; (b) the mean level grows steadily for a long period at a slow, steady rate, spontaneous combustion of coal is evolving; (c) CO concentration builds up rapidly and, after having reached a certain limit value, persists as such for a certain period, an exogenous underground fire is developing.
||carbon monoxide; fire detection; mine fires
||fire protection; coal mining; prediction formulae
||D - Periodical articles
|Country / State or Province||USSR|
||Fire and explosions
|Broad subject area(s)
||Fires, explosions and major hazards