Influences of geometric changes on the over-pressure of methane-air deflagration

L. Wang, J. C. Tien

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

Abstract

The impact of a methane explosion on mining operations cannot be over-emphasized. The explosion is a result of rapid combustion when a methane/air mixture is ignited by an unexpected energy release, such as a mine fire, electrical arc or sparks caused by frictions or rock falls. In most cases, an ignition of methane/air mixture could result in a deflagration other than detonation. Resulting flames and overpressure induced by a methane deflagration will harm neighboring miners and local ventilation control devices.. ,It is essential that the mechanism of an explosion and associated destructiveness be fully understood. This research seeks to predict an influence region of an incident happened within a representative underground mine geometry. The most common geometric changes in an underground coal mine are bends, regulators/doors, obstacle in airways and changes in sectional area. These geometric changes could result in an attenuation of the flame and pressure wave as a result of a methane deflagration. A study of this phenomenon could enable mine planners to have better understanding of the over-pressure redistribution due to the explosion. Both numerical and experimental work has been done in this study to ascertain a better insight of this potentially devastating event. The experimental data are also used to validate the turbulence and combustion models used in this test.

Original languageEnglish
Title of host publication2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014
Subtitle of host publicationSalt Lake City, UT, USA; 23 - 26 February 2014
PublisherSociety for Mining, Metallurgy, and Exploration
Pages464-467
Number of pages4
ISBN (Print)9781632665263
Publication statusPublished - 2014
Event2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014 - Salt Lake City, UT, United States of America
Duration: 23 Feb 201426 Feb 2014

Conference

Conference2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014
CountryUnited States of America
CitySalt Lake City, UT
Period23/02/1426/02/14

Keywords

  • Bends
  • Cross-section change
  • Methane deflagration
  • Obstacles

Cite this

Wang, L., & Tien, J. C. (2014). Influences of geometric changes on the over-pressure of methane-air deflagration. In 2014 SME Annual Meeting and Exhibit: Leadership in Uncertain Times, SME 2014: Salt Lake City, UT, USA; 23 - 26 February 2014 (pp. 464-467). Society for Mining, Metallurgy, and Exploration.