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《Journal of Northeastern University(Natural Science)》 2009-08
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Experimental Study on Different Rock Locating Algorithms with Acoustic Emission

LIU Jian-po1,WANG Hong-yong2,YANG Yu-jiang1,LI Yuan-hui1(1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110004,China;2.China Nonferrous Hongtoushan Fushun Mining Group Co.,Ltd.,Fushun 113321,China.)  
Acoustic emission(AE) locating technique was applied to studying the 3-D evolutionary process of micro-cracks during different rock(granite/sandrock) failures under different loading conditions.The locating principles of both Geiger algorithm and simplex algorithm were analyzed with their locating accuracies comparatively discussed through experimental verification.The results showed that locating an event by acoustic emission can visually reflect the whole dynamic process from initiation and propagation to breakdown of micro-cracks,just like the process of rock failure.The locating accuracy of simplex algorithm is higher than Geiger algorithm but,as to the number of locating events by AE,the latter is more than the former.However,when studying the instability and failure process of rock by AE locating technique,what algorithm is feasible should be decided as the case may be.And two or more locating algorithms are simultaneously available to compare then analyze the results so as to get more accurate findings.
【Fund】: 国家高技术研究发展计划项目(2007AA06Z107);; 国家科技支撑计划项目(2008BAB34B02);; 教育部新世纪优秀人才支持计划项目(NCET-07-0163)
【CateGory Index】: TP391.41
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