A Fundamental Study of High-Speed Methane-Air Deflagrations Across Simulated Gob Walls and Sphere Beds View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2019

AUTHORS

Claire Strebinger , Gregory Bogin , Jürgen Brune

ABSTRACT

Detailed knowledge of flame propagation and pressure generation from methane-air deflagrations with and without obstacles is necessary to understand and help mitigate methane gas explosions in longwall coal mines. Experiments were performed in a quartz flow reactor investigating the effects of confinement, void spacing, and gob geometry on methane flame dynamics using a simulated gob of glass spheres. Results show ignition from a confined space increased flame propagation velocity over 5000% and peak pressure 1300%. A 3.8 cm high simulated gob wall (73% void space) further enhanced flame speed 14% and peak pressure approximately 50%. Decreasing void spacing of a sphere bed from 96 to 89% increased flame speeds 2–4% and pressures 15–35%. Results demonstrate that mine layout and gob characteristics can have a significant impact on the propagation and severity of a methane gas explosion. Experiments from this study will aid in providing a comprehensive understanding of the factors contributing to methane explosion enhancement in longwall coal mines. More... »

PAGES

410-422

Book

TITLE

Proceedings of the 11th International Mine Ventilation Congress

ISBN

978-981-13-1419-3
978-981-13-1420-9

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-981-13-1420-9_35

DOI

http://dx.doi.org/10.1007/978-981-13-1420-9_35

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1105981463


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