Underground fire-fighting system by a rapid evaporation method of liquid nitrogen

Takeshi Komai, Takehiro Isei

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A new underground fire-fighting system has been developed on the basis of a gas-liquid mixing-type nozzle which enables liquid nitrogen to form as very fine droplets and to be evaporated in the ventilation atmosphere. By using this system, it has become possible to evaporate a large quantity of liquid nitrogen in short times without any additional heat source near the fire area. Through the model gallery experiments using this system, open fires have been extinguished successfully within the restriction of a ventilation speed of up to 2 m/s. Furthermore, a satisfactory suppression effect has been proved through full-scale open-fire experiments in a timber-lined gallery. Thus, it is concluded that the newly developed fire-fighting system can be put into practice.

Original languageEnglish
Pages (from-to)145-152
Number of pages8
JournalMining Science and Technology
Issue number2
Publication statusPublished - 1989 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Science(all)
  • Engineering(all)
  • Earth and Planetary Sciences(all)


Dive into the research topics of 'Underground fire-fighting system by a rapid evaporation method of liquid nitrogen'. Together they form a unique fingerprint.

Cite this