›› 2008, Vol. 29 ›› Issue (6): 1644-1648.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Catastrophe mechanism analysis of coal and gas outburst in coal heading face

ZHAO Zhi-gang1,2, TAN Yun-liang1,2, CHENG Guo-qiang1,2   

  1. 1.College of Resources and Environment，Shandong University of Science and Technology，Qingdao 266510, China; 2. Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, China
  • Received:2007-04-29 Online:2008-06-10 Published:2013-07-15

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Abstract: The mechanical model of circular layer-crack structure of coal heading face is established with the simplification that the laneway is circular. Based on the expression of total potential energy function, a fold catastrophe model of circular layer-crack structure is established; the sudden change condition of gas outburst is given. The research results indicate that the coal and gas outburst will happen if pressure drop of the two sides of plate is larger than critical value. This research result is useful for gas outburst prevention.

Key words: coal and gas outburst, laneway circular layer-crack structure, fold catastrophe model

CLC Number: 

  • TD 322
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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