›› 2005, Vol. 26 ›› Issue (6): 841-844.

• Fundamental Theroy and Experimental Research •     Next Articles

Research on prediction of creep collapsing time for uncovering gas coal plane

XIAN Xue-fu, LI Xiao-hong, JIANG De-yi, JIANG Yong-dong   

  1. Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400030, China
  • Received:2005-03-08 Online:2005-06-10 Published:2013-12-17

Abstract: Through the analysis of coal creeping feature, the paper proved that quintic rheological model with adhesiveness, elasticity and plasticity functions well in describing the creeping. On consideration of the power of coal gas, it was figured out the state law of the creeping of coal with gas. It is found that creeping occurs to coal in certain situation because the stress on uncovering coal plane has changed from three-dimensional stress to dichroic. If coal is two-way stressed, the strain on the direction of uncovering plane is tension strain; and this tension strain of the coal on the uncovering plane excesses that level of coal breaking up, the creep collapsing happens. With this method, it can be predicted the time of creep collapsing on uncovering coal plane. The method can also explain the mechanics of rock collapsing in engineering by this way.

Key words: uncovering coal plane, creeping model, creep collapsing time

CLC Number: 

  • TD 325
  • 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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