›› 2006, Vol. 27 ›› Issue (7): 1097-1100.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on transition law between EME and energy during deformation and fracture of coal or rock under compression

XIAO Hong-fei1, HE Xue-qiu2, WANG En-yuan2   

  1. 1.College of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; 2.College of Energy Science and Engineering, China University of Mining and Technology, Xuzhou 221008, China
  • Received:2004-10-12 Online:2006-07-10 Published:2013-11-19

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Abstract: The changing laws of electromagnetic emission (EME) and acoustic emission (AE) during the deformation and failure of the coal or rock sample under uniaxial compression are studied experimentally. Then the energy transformation relation between EME signal and stress fields in the course of deformation and failure of the coal or rock is researched on the basis of experimental testing results. The research results show that: the intensities and pulse of EME and AE will increase with the increasing of loading time or stress and the enhancement of deformation and fracture; the relation between the EME intensity, pulse numbers and the loading stress is positive; the EME value will decrease after the summit value; the changing curve between EME energy and mechanical energy is consistent with the relation curve between stress and strain, which conforms to thrice multinomial approximately; so it is feasible to study the relation between EME and stress during deformation and fracture in view of energy transformation.

Key words: uniaxial compression, deformation and fracture of coal or rock, energy transformation, electromagnetic emission(EME), experimental research

CLC Number: 

  • TD 713.1
  • 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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