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Appl. Sci. 2016, 6(5), 145; doi:10.3390/app6050145

Failure Mode Analysis and Dynamic Response of a Coal Mine Refuge Chamber with a Gas Explosion

1
School of Civil Engineering, Harbin Institute of Technology, Haihe Road 202, Harbin 150090, China
2
Ministry of Education Key Laboratory of Structural Dynamic Behavior and Control, Harbin Institute of Technology, Harbin 150090, China
*
Author to whom correspondence should be addressed.
Academic Editor: César M. A. Vasques
Received: 27 January 2016 / Revised: 15 April 2016 / Accepted: 4 May 2016 / Published: 11 May 2016
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Abstract

A gas and coal dust explosion is potential hazard in majority coal mines. A coal mine mobile refuge chamber is a new class of device for miners those who are unable to escape after an accident which can provide basic survival conditions. In this paper, in order to study the propagation law of an underground methane/air mixture explosive wave, and check the failure mode of a coal mine mobile refuge chamber, a full-sized underground tunnel model and a refuge chamber model have been established in ANSYS/LS-DYNA (LSTC, R7.0.0, Livermore, CA, USA, 2014). The simulation results show that the reflected wave pressure on the front surface of the refuge chamber was about twice as high than the incident wave. The pressure on various locations of the chamber was also analyzed. When the peak pressure of the explosive shockwave reached 0.64 MPa, the maximum displacement and stress occur at the center of the front door and the joint of stiffeners and the front plate, respectively. Most parts of the coal mine mobile refuge chamber were in a plastic failure state and the refuge chamber could be defined as damaged. The front door, the front plate, the connecting flange, and the stiffeners on each side were the primary key components. In the end, suggestions were proposed for the refuge chamber. View Full-Text
Keywords: refuge chamber; failure mode; blast impact; dynamic response; gas explosion refuge chamber; failure mode; blast impact; dynamic response; gas explosion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, B.; Zhai, D.; Wang, W. Failure Mode Analysis and Dynamic Response of a Coal Mine Refuge Chamber with a Gas Explosion. Appl. Sci. 2016, 6, 145.

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