›› 2013, Vol. 34 ›› Issue (9): 2569-2575.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental research on rules of acoustic emission and microseismic effects of burst failure of compound coal-rock samples

WANG Xiao-nan1, 2，LU Cai-ping1, 2, 3，XUE Jun-hua4，YU Guo-feng4， LUO Yong4，LIU Hui1, 2，ZHANG Jun-wei1, 2   

  1. 1. School of Mining Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. Key Laboratory of Deep Coal Resource Mining of Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 3. College of Earth and Mineral Sciences, Pennsylvania State University, Philadelphia 16801, America; 4. State Key Laboratory of Deep Coal Mining and Environment Protection, Huainan Mining Industry Group, Huainan, Anhui 232001, China
  • Received:2012-07-07 Online:2013-09-11 Published:2013-09-13

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Abstract: The acoustic emission (AE) and microseismic (MS) rules in the process of deformation and failure of samples combined with roof, coal and floor are very important to reveal the dynamic mechanism of rockburst. The compound samples were tested by SANS material testing system under uniaxial compression condition. During the whole test process, the AE and MS events were monitored by DISP-24 AE system and TDS-6 MS collection system. The results showed that the larger the uniaxial compressive strength, rockburst tendency and the ratio of roof height to coal height of compound samples are, the stronger the intensity of AE and MS signal is. The amplitude of MS signal can reflect the rockburst tendency of compound samples. The spectrum distribution of MS signal in the high frequency band will increase along with the increasing compressive strength and impact energy index of samples. The above conclusions are of great significance to evaluate, monitor and warn rockburst in coal mines.

Key words: mining engineering, compound coal-rock, acoustic emission, microseism, spectrum

CLC Number: 

  • TD 315
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