10004
DOI: 10.14311/BSS.2014.0004
EXPERIMENTAL STUDIES ON PROCESS OF METHANE-AIR SYSTEM EXPLOSION IN UNDERGROUND STRUCTURES
Petr Šelešovský1, Vaclav Pospichal2*
1 Scientific-Research Coal Institute VVUU a. s., Ostrava, Czech Republic
2 Czech Technical University in Prague, Faculty of Civil Engineering, Prague, Czech Republic
*Corresponding author. Email: pospichal@fsv.cvut.cz
The propagation and attenuation of air blast waves of methane-air mixtures in underground structures has its own specificities. This paper presents the results of full-scale field tests of methane-air system explosion in a tunnel. The experiments were performed by the Scientific-Research Coal Institute VVUU under the supervision of the Department of Technology of Building, Czech Technical University in Prague. Time-dependent measurements of the response of the underground structures to the blast wave loads were successfully recorded using a variety of measurement devices. Methane-air chambers 5, 10 and 20m in length were generated during experimental measurements, and the transition of explosion transformations into the accelerated deflagration mode was monitored. At the same time, we investigated to what extent shading elements participated in the accelerated turbulence of flowing gaseous media and how much they affected the kinetics of explosion transformations.
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