Acoustic Emission of Coal in the Postlimiting Deformation State
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The features of acoustic emission in coal samples in the state of pre- and postlimiting deformation are considered. It is shown that in the postlimiting deformation stages and in the transient period, a contrary change is observed in a correlation coefficient of the acoustic emission activity \(\dot N_\Sigma\) recorded in the upper and lower portions of a sample; whereas in the prelimiting deformation stages, this change is consistent. It is proposed to recognize the stages of deformation by the correlation coefficient of \(\dot N_\Sigma\) recorded in different zones: a positive coefficient corresponds to the prelimiting stage of deformation, and a negative one corresponds to the postlimiting stage.
KeywordsCoal acoustic emission activity postlimiting deformation correlation coefficient
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- 1.A. S. Voznesenskii, M. N. Tavostin, A. Yu. Gladkii, and G. N. Mizgin, “Acoustic emission under step-by-step deformation of rock samples,” in: Physical Acoustics. Wave Propagation and Diffraction. Geoacoustics. Proceedings of the 15th Session of the Russian Acoustic Society [in Russian], 1, Geos, Moscow (2004).Google Scholar
- 2.A. S. Voznesenskii, M. N. Tavostin, and A. Yu. Gladkii, “Acoustic emission effects under deformation of coal in the state of maximum compaction,” in: Proceedings of the International Conference on Problems and Prospects of Mining Sciences [in Russian], IGD SO RAN, Novosibirsk (2004).Google Scholar
- 3.A. S. Voznesenskii, M. N. Tavostin, and Yu. V. Demchishin, “Effect of change in time of acoustic emission attenuation in rock salt when subjected to the maximum compaction,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 1 (2002).Google Scholar
- 4.A. S. Voznesenskii, M. N. Tavostin, and Yu. L. Filimonov, “Features of acoustic emission in rock salt conditioned by nonlinearity of its properties,” in: Nonlinear Acoustics at the Beginning of the 21st Century [in Russian], 2, O. V. Rudenko and O. A. Sapozhnikov (eds.), Faculty of Physics, MSU, Moscow (2002).Google Scholar
- 5.A. S. Voznesenskii and Yu. V. Demchishin, “Features of acoustic emission in rocks under deformation,” Gorn. Inform.-Analit. Byull., No. 6 (1999).Google Scholar
- 6.A. S. Voznesenskii, E. S. Oksenkrug, M. N. Tavostin, Yu. L. Filimonov, E. M. Shafarenko, and V. A. Voznesenskii, “Acoustic emission in rock salt at the stages of attenuating and steady-state creep,” in: Proceedings of the 5th Session of Problems of Geoacoustics. Methods and Means [in Russian], MGGU, Moscow (1996).Google Scholar
- 7.V. L. Shkuratnik, Yu. l. Filimonov, and S. V. Kuchurin, “Experimental investigations into acoustic emission in coal samples under uniaxial loading,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 5 (2004).Google Scholar
- 8.V. L. Shkuratnik, Yu. l. Filimonov, and S. V. Kuchurin, “Regularities of acoustic emission in coal samples under triaxial compression,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 1 (2005).Google Scholar
- 9.C. Daley, Level 1 & 2 Chaotic Brittle Crushing, http://www.mathcad.com/Library/LibraryContent/L12_cracks.mcd.Google Scholar
- 10.V. S. Kuksenko, I. E. Inzhevatkin, B. Ts. Manzhikov, et al., “Physical and methodical principles of rock burst prediction,” Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 1 (1987).Google Scholar