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1981: ACOUSTIC EMISSION OF ROCKS UNDER TRIAXIAL COMPRESSION ALONG VARIOUS STRESS PATHS. Acta Seismologica Sinica, 3(1): 41-48.
Citation: 1981: ACOUSTIC EMISSION OF ROCKS UNDER TRIAXIAL COMPRESSION ALONG VARIOUS STRESS PATHS. Acta Seismologica Sinica, 3(1): 41-48.
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ACOUSTIC EMISSION OF ROCKS UNDER TRIAXIAL COMPRESSION ALONG VARIOUS STRESS PATHS

  • Institute of Geophysics, State Seismological Bureau

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  • Published Date: August 31, 2011
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    • Abstract
  • Acoustic emission of Jinan gabbro and Shangpin granite samples has been observed under triaxial compression along various stress paths (confining pressure up to 1.3 kb). When the maximum principal stress was increased until the rock sample failed (case A), the average acoustic emission rate gradual increased, an abrupt increase of acoustic emission occurred at about several hundred bars prior to rupture. When starting from a high stress state and the confining pressure was decreased (caseB), an abrupt increase of acoustic emission occurred much later, only about 20-30 bars before rupture. The total number of acoustic emission in the fracture process was much less only one-third of that in case A. There were two processes in case B: loading process for differential tensor component of the stress field; unloading process for spherical symmetric tensor componen (hydrostatic). It is possible that the different characteristics of acoustic emission is due to the existence of the unloading process.
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    • References (1)
  • [1] K Mogi, Earthquakes as fractxxre in the earth, in "Advances in Rock Mechanics"Proc. 3rd.Conf. Int. Soc. Rock Mechanics, IA, 559——568. 1974.

    [2] C. H. Seholz, Experimental study of the fracturing process in brittle rocks, J. Geophys. Res., 73,1447——1454,1968

    [3] C. F. Bacon, Acoustic emission along the San Andreas fault in southern central California, Ma——terials evaluation,34.5. 1976.

    [4] J. D. Byerlee, A review of rock mechanics studies in the United States pertinent to earthquake prediction, PAGEOPH, 116(4/5),586——602, 1978

    [5] K, Mogi, Study of elastic shocks caused by the fracture of heterogeneous materials, and its rela——tion to the earthquake phenomena, Bull. Eartla. Res. Inst., 40, 1, 105——173, 1962

    [6] H. J. Alheid and F. Rummel. Acoustic emission during frietiona.l sliding along shear planes in rock in "Proc. First conf. on Acoustic Emission/Microscismic Activity in Geological Sttuctttre and Materials",149——154. 1977.

    [7] R Chen, N .G. Geng, and X. X. Yiao, Strength and volume changes of rocks under triaxial com——pression with various stress paths, Submitted to Scientia ,Sinica. 11. 1093——1100. 1979

    [8] R.W B. Stepliens, A. A.Polloek, Waveform and frequency spectra of acoustic emission,J. of Acoustic Society of America,50,3,904——910,1970

    [1] K Mogi, Earthquakes as fractxxre in the earth, in "Advances in Rock Mechanics"Proc. 3rd.Conf. Int. Soc. Rock Mechanics, IA, 559——568. 1974.

    [2] C. H. Seholz, Experimental study of the fracturing process in brittle rocks, J. Geophys. Res., 73,1447——1454,1968

    [3] C. F. Bacon, Acoustic emission along the San Andreas fault in southern central California, Ma——terials evaluation,34.5. 1976.

    [4] J. D. Byerlee, A review of rock mechanics studies in the United States pertinent to earthquake prediction, PAGEOPH, 116(4/5),586——602, 1978

    [5] K, Mogi, Study of elastic shocks caused by the fracture of heterogeneous materials, and its rela——tion to the earthquake phenomena, Bull. Eartla. Res. Inst., 40, 1, 105——173, 1962

    [6] H. J. Alheid and F. Rummel. Acoustic emission during frietiona.l sliding along shear planes in rock in "Proc. First conf. on Acoustic Emission/Microscismic Activity in Geological Sttuctttre and Materials",149——154. 1977.

    [7] R Chen, N .G. Geng, and X. X. Yiao, Strength and volume changes of rocks under triaxial com——pression with various stress paths, Submitted to Scientia ,Sinica. 11. 1093——1100. 1979

    [8] R.W B. Stepliens, A. A.Polloek, Waveform and frequency spectra of acoustic emission,J. of Acoustic Society of America,50,3,904——910,1970
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