Application of composite fly ash gel to extinguish outcrop coal fires in China

Jun Deng, Yang Xiao (), Junhui Lu, Hu Wen and Yongfei Jin

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2015, vol. 79, issue 2, 898 pages

Abstract: This paper presents the application of composite fly ash gel injection technology, along with several other methods to help extinguish outcrop coal fires (excavation, blasting and sealing). The Haibaoqing coal fires extended for 6000–7000 m across ~1000-m-wide area, part of which was simulated by Fluent to determine the distribution of high temperature and the situation of leakage. The radon-test method was used to accurately detect the extent of the burning area, along with the degree and tendency of burning. The areas were then separated into three distinct regions: north, middle and south. The gel injecting and monitoring boreholes were then installed in the regions. A comprehensive application of composite fly ash gel injection technology, excavation, blasting and sealing was used to extinguish the outcrop coal fire. After subsurface blasting, the composite gel was injected into the coal seams to extinguish and prevent re-ignition of the fires by filling in new areas created by the blasting and forming an effective composite coverage in order to prevent combustion. Boreholes monitored temperature and CO concentrations during the entire process to indicate when the fire was extinguished, along with extended monitoring to verify no combustion reoccurred. Using this combination of methods has proven to effectively extinguish the coal fires at reasonable costs in the region. Copyright Springer Science+Business Media Dordrecht 2015

Keywords: Composite fly ash gel; Radon-test; Borehole; Excavation; Blasting; Sealing; Outcrop coal fire (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://hdl.handle.net/10.1007/s11069-015-1881-9 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:nathaz:v:79:y:2015:i:2:p:881-898

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/11069

DOI: 10.1007/s11069-015-1881-9

Access Statistics for this article

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards is currently edited by Thomas Glade, Tad S. Murty and Vladimír Schenk

More articles in Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards from Springer, International Society for the Prevention and Mitigation of Natural Hazards
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().