ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)55225
CIS number 91-265
ISSN - Serial title 0041-5804 - Ugol' Ukrainy
Year 1988
Convention or series no.
Author(s) Vasil'ev N.F., Hohlov N.N.
Title Detection of underground fires by carbon monoxide (CO) concentration change monitoring in return ventilation streams
Original title Obnaruženie podzemnyj požarov po izmeneniju koncentracii okisi ugleroda v ishodjaščih strujah vozduha [in Russian]
Bibliographic information Dec. 1988, No.12, p.35. Illus. 3 ref.
Abstract 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.
Descriptors (primary) carbon monoxide; fire detection; mine fires
Descriptors (secondary) fire protection; coal mining; prediction formulae
Document type D - Periodical articles
Country / State or ProvinceUSSR
Subject(s) Fire and explosions
Broad subject area(s) Fires, explosions and major hazards
Browse category(ies) Fires
Carbon monoxide
Inorganic substances