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《Journal of University of Science and Technology Beijing》 2003-06
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Effect of Gas Flow on the Spectrum of Electromagnetic Radiation

NIE Baisheng, HE Xueqiu, SUN Jiping, WANG Enyuan, LIU Zhentang School of Resource and Safety Engineering, China University of Mining and Technology (Beijing Campus), Beijing 100083, China; School of Energy Science and Engineering, China University of Mining and Technology, Xuzhou 221008, China; School of Mechanical, Electronic and Information Engineering, China University of Mining and Technology (Beijing Campus), Beijing 100083, China  
A airtight large-diameter urn was made in which electromagnetic radiation (EMR) antennae can be placed and the experimental system was set up that can detect EMR signals during gas flowing in coal. EMR spectrum analysis was done by Fourier transform when different kinds of gas under different pressure gradients flow in coal. The results show that frequency band of EMR produced by gas flowing is usually in low frequency and its main frequency band increases with the increase of pressure gradient. The higher the pressure gradient and the rate of gas flow, the more intensive the destruction of coal and the motion-electricity effect, and the higher the frequency of crack oscillation.
【Fund】: 国家自然科学基金(No.50134040);; 国家自然科学基金(No.59874028 No.50204010);; 国家杰出青年基金(No.59925411);; 国家十五攻关项目(No.2001BA80380408);; 中国博士后科学基金(No.2002032120);; 江苏省自然科学基金(No.BK2001075)
【CateGory Index】: TD712
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