Study of the influence of the characteristics of loose residual coal on the spontaneous combustion of coal gobShow others and affiliations
2020 (English)In: Energy Science & Engineering, ISSN 2050-0505, Vol. 8, no 3, p. 689-701
Article in journal (Refereed) Published
Abstract [en]
Mine fires are becoming a serious issue as the intensity of mining increases, especially in deep mines. Loose coal gob has a hidden ignition location and a high possibility of spontaneous combustion, which makes fire prevention difficult. Therefore, based on the theory of gas seepage and the characteristics of loose coal, a model of air leakage and spontaneous combustion in gob is established in this paper. Using working face #10414 in the Yangliu coal mine as an example, the relationship between the three spontaneous coal combustion (CSC) zones and the three stress zones is analyzed and verified by combining a FLAC3D simulation with field monitoring. In addition, the influence of advancing speed on the CSC is discussed, and suggestions for fire prevention are presented. The results show that the variation in the calorific value of the CSC with increasing degree of looseness of the residual coal in the gob forms an arch‐shape. There is a one‐to‐one relationship between the distribution of the three stress zones and the three CSC zones. In addition, as the advancing speed increases, the contact time between the loose coal body and the air decreases and the possibility of CSC decreases. This study provides a scientific basis for fire prevention and control in mines.
Place, publisher, year, edition, pages
John Wiley & Sons, 2020. Vol. 8, no 3, p. 689-701
Keywords [en]
air leakage and spontaneous combustion model, degree of looseness of residual coal, fire prevention measures, in situ monitoring, numerical simulation
National Category
Geotechnical Engineering and Engineering Geology
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-76977DOI: 10.1002/ese3.542ISI: 000495488100001PubMedID: 31825293Scopus ID: 2-s2.0-85074843957OAI: oai:DiVA.org:ltu-76977DiVA, id: diva2:1374350
Note
Validerad;2020;Nivå 2;2020-03-31 (alebob)
2019-11-292019-11-292025-02-07Bibliographically approved