Behavior of airflow and methane at heading faces with auxiliary ventilation system

Shinji Tomita, Masahiro Inoue, Kenichi Uchino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The airflows and methane gas concentrations at a heading face with forcing, exhausting and combined systems of ventilation were examined in a reduced scale model gallery. Methane was emitted at the face. Methane concentration was measured and its accumulation was visualized by Titanium tetrachloride (TiCl4). The location of the duct end gives significant effects on the airflow. The optimal airflow rate through a forcing and exhausting duct and duct end locations to reduce hazard of methane accumulation were investigated for the combined system of ventilation. Methane accumulation was investigated in another reduced scale model. Water was used instead of air and very fine bubbles generated by electrolysis were employed as tracer in this model. The behavior of bubbles in water is quite similar to that of methane in the air. The airflow and methane accumulation were also examined when a large machine such as a road heading machine is placed near the heading face.

Original languageEnglish
Title of host publicationMining Science and Technology '99
EditorsH. Xie, T.S. Golosinski, H. Xie, T.S. Golosinski
Pages69-72
Number of pages4
Publication statusPublished - Jan 1 2002
EventProceedings of the '99 International Symposium on Mining Science and Technology - Beijing, China
Duration: Aug 29 1999Aug 31 1999

Publication series

NameMining Science and Technology '99

Other

OtherProceedings of the '99 International Symposium on Mining Science and Technology
CountryChina
CityBeijing
Period8/29/998/31/99

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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