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Rules of variation in hydrogen during reignition of underground fire zones of spontaneous coal combustion

Authors
Journal
Mining Science and Technology (China)
1674-5264
Publisher
Elsevier
Publication Date
Volume
20
Issue
4
Identifiers
DOI: 10.1016/s1674-5264(09)60232-5
Keywords
  • Unsealing Fire Zone
  • Reignition
  • Hydrogen
  • Generation Model
  • Indicator Gas

Abstract

Abstract In light of the possibility of reignition when unsealing the closed fire zones, the occurrence of reignition was simulated by a home-made experimental device, hydrogen variety rule from combustion to unsealing was analyzed, the three-stage generation model of hydrogen during reignition in fire zone was put forward and the probability that hydrogen was taken as an indicator gas was discussed. The results show that: when fire zone is ready to unseal, which is filled with hydrogen at a high concentration, it is more prone to reignite.

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