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Metal Mine ›› 2011, Vol. 40 ›› Issue (08): 56-59.

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Prediction Research of Rock Burst Tendency Based on the Acoustic Emission Test

Shang Xiaoji1,Zhang Zhizhen1,2,Tian Zhili1,Lin Bin1   

  1. 1.School of Mechanics & Civil Engineering, China University of Mining and Technology; 2. State Key Laboratory for Geomechanics & Deep Underground Engineering
  • Online:2011-08-09 Published:2011-08-11

Abstract: To study the association between the rock burst proneness of rock and the acoustic emission characteristics in the loading process, the quantitative relationship of acoustic emission cumulative number and the strain in the loading processes with different rock burst proneness are established; Meanwhile, the laboratory experiments on three kinds of rock with different rock burst proneness under uniaxial loading are made to study the acoustic emission characteristics, which have verified its accuracy. The results show that when rock burst proneness of rock is stronger, ,the acoustic emission appear only sporadically before the main failure with the increase of dependent variable, and the energy is less; The acoustic emission after the main failure almost have none, while the acoustic emission number and energy are significant in the main failure. On the other hand, when rock burst proneness is weaker, small acoustic emission have appeared soon after loading, with no rules in time, and there is no stage with significant change of acoustic emission rate.

Key words: Rock mechanics, Acoustic emission, Rock burst proneness, Prediction