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《Progress in Geophysics》 2013-02
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The analysis of induced charge of electric friction in coal rock

TANG Zhi,PAN Yi-shan,LI Guo-zhen,ZHAO Yang-feng(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China)  
Using self-developed charge inductor,test system about induced charge of electric friction in coal rock is set up.This paper studied the charge induction law of coal,granite and sandstone in the friction condition.The result shows that coal rock's friction can rapidly produce induced charge signals,and the granite can produce stronger signals than the coal does in a certain range,while the sandstone produces the least.The coal rock produces weaker induced charge signals than it does in uniaxial compression condition.It explains that the coal rock flicts to produce electric charge,but it's just one of the most important parts of induced charge signals of coal rocks.This can make contribution to studying the principle of coal rock induced charge.
【Fund】: 国家重点基础研究发展计划(973计划)(2010CB226803);; 国家自然科学基金面上项目(11172121)资助
【CateGory Index】: TD313.1
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