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《Journal of Safety and Environment》 2003-04
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RESEARCH ON THEORETICAL AND EXPERIMENTAL PRINCIPLE OF PREDICTING COAL AND GAS OUTBURSTS BY MEANS OF ELECTROMAGNETIC EMISSION (EME)

LIU Ming-ju 1, LIU Yan-wei 1, HE Xue-qiu 2, WANG En-yuan 2 (1 Department of Resources and Materials Engineering, Jiaozuo Institute of Technology, Jiaozuo 454000, Henan, China; 2 Energy College, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China)  
This paper aims to introduce the basic theoretical and experimental principles on predicting the coal and gas outbursts by using electromagnetic emission (EME), which is generally thought of as a guiding new and high-tech means in this field. In accordance with the experiment and application results, the paper has also made a discussion on the EME principle of deformation and fracture of coal and rock. Both the EME amplitude and the pulse, as a matter of fact, expands with the load increase, but they are not the strict with the synchronous variation. The author also intends to extend his point of view that the mechanism of coming into being EME is the resultant of the electric dipole transient, the variable motion of separate charge and the vanishing of the separate charge. That is to say, both EME amplitude and pulse can be used as the sensitive index mark for predicting the coal and gas outburst. The predicting coal and gas outbursts with EME is by nature a geophysical method with a highly promising prospect for its great practicable adaptability in coal mining industry. It helps to realize continuous, non-contact, accurate, reliable and automated monitoring and predicting of the coal and gas outbursts. At the same time, the paper also points out some present unknown fields and the shortage of the research findings lately. Last of all, the author is glad to show some research orientations and goals to be achieved.
【Fund】: 河南省杰出青年基金资助项目“煤岩动力灾害电磁辐射规律效应研究”
【CateGory Index】: TD713.2
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