Effect of coal mine organic aerosol on the methane/air lower explosive limit

S. V. Valiulin, A. A. Onischuk, A. M. Baklanov, A. A. Bazhina, D. Yu Paleev, V. V. Zamashchikov, A. A. Korzhavin, S. N. Dubtsov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Organic aerosol is formed in coal mines due to heat release and evaporation of organics from coal during the longwall operation. This frictional heating occurs when a metallic cutting bit strikes a rock. Thus formed organic aerosol can contribute significantly to the explosivity of methane/air atmosphere in coal mines. In this paper, the flammable limits for the methane–air mixtures with organic aerosol are determined. For this purpose, organic aerosol is synthesizes from the coal-tar pitch in a laboratory evaporation–nucleation flow chamber. Aerosol particles synthesized under laboratory conditions are aggregates consisting of small primary particles with the fractal-like dimension Df = 2.0 ± 0.1, which is close to Df = 2.1 ± 0.1 of coal mine aerosol. It is shown that the flammability of organic aerosol/methane mixture in air is in good agreement with the Le Chatelier additive principle. The lower ignition limit for the pure organic aerosol in air is 44 g/m3.

Original languageEnglish
Pages (from-to)778-786
Number of pages9
JournalInternational Journal of Coal Science and Technology
Issue number4
Publication statusPublished - Dec 2020


  • Agglomeration
  • Coal mine
  • Explosivity of aerosol
  • Methane-air mixtures
  • Organic aerosol


Dive into the research topics of 'Effect of coal mine organic aerosol on the methane/air lower explosive limit'. Together they form a unique fingerprint.

Cite this