Experiment study on the propagation laws of gas and coal dust explosion in coal mine

The experiment of gas and coal dust explosion propagation in a single laneway was carried out in a large experimental roadway that is nearly the same with actual environment and geometry conditions. In the experiment, the time when the gas and coal dust explosion flame reaches test points has a loga...

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Bibliographic Details
Published inJournal of coal science & engineering, China Vol. 15; no. 3; pp. 262 - 266
Main Authors Si, Rong-jun, Li, Run-zhi, Wang, Lei, Wu, Zi-ke
Format Journal Article
LanguageEnglish
Published Heidelberg China Coal Society 2009
Subjects
Earth and Environmental Science
Earth Sciences
Geochemistry
Geology
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Mechanical Engineering
gas and coal dust explosion
flame propagation velocity the maximum explosion pressure
flame area
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Summary:The experiment of gas and coal dust explosion propagation in a single laneway was carried out in a large experimental roadway that is nearly the same with actual environment and geometry conditions. In the experiment, the time when the gas and coal dust explosion flame reaches test points has a logarithmic function relation with the test point distances. The explosion flame propagation velocity rises rapidly in the foreside of the coal dust segment and comes down after that. The length of the flame area is about 2 times that of the original coal dust accumulation area. Shock wave pressure comes down to the rock bottom in the coal dust segment, then reaches the maximum peak rapidly and comes down. The theoretical basis of the research and assemble of across or explosion is supplied by the experiment conclusion. Compared with gas explosion, the force and destruction degree of gas and coal dust explosion is much larger.
ISSN:1006-9097
1866-6566
DOI:10.1007/s12404-009-0309-0