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 Province | USSR |
Subject(s) |
Fire and explosions
|
Broad subject area(s) |
Fires, explosions and major hazards
|
Browse category(ies) |
Fires Carbon monoxide Inorganic substances
|