Abstract
A lot of researches onb value have been made in seismology. Since the 1960’s Mogi, Scholz and others have studied AE of rock specimens in laboratory and discovered that it is related to natural earthquakes. All former researchers used integral specimens to studyb value in the laboratory. However a major earthquake is usually related to a existing seismic-fault in that area. For this reason, a series of fracture experiments with rock and glass specimens having pre-existing crack or notch is performed in order to examine the effect of preexisting crack tob value. The experimental results show that theb value begins to decrease as soon as the initiation of the crack and finally drop to a very low value when the specimen breaks unstably. Based on these, a brief discussion on the possible mechanism ofb value change for natural earthquakes is given.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Aki, K., 1984. The use of a physical model of fault mechanics for earthquake prediction, in:A Collection of Paper of International Symposium on Continental Seismicity and Earthquake Prediction (ISCSEP). Seismological Press, 653–659.
Aki, K., 1981. A probabilistic synthesis of precursory phenomena, in:Earthquake Prediction, An International Review. D.W. Simpson and P.G. Richards (eds), A.G.U., Washington, D.C., 660.
Asada, T., Suzuki, J. and Tomoda, Y., 1950. Seismic frequency and energy.Zisin,2, 11–15 (in Japanese).
Chen, Y., Yu, X. H., Dai, H. C. and Yan, H., 1985. The influences of stress path on AE of rock—Discussion on the mechanism of reversion earthquakes.Seismological and Geomagnetic Observation and Research,6, 1–7 (in Chinese).
Fonseka, G. M., Murrell, S. A. F. and Barnes, P., 1985. Scanning electron microscope and acoustic emission studies of crack development in rocks.Int. J. Rock Mech. Min. Sci. Geomech. Abstr.,22, 273–289.
Geng, N. G., 1986. The development ofb-value simulated experiments and the beginning ofb-value simulated experiments in China.Acta Seismologica Sinica,8, 330–333 (in Chinese).
Gutenberg, B. and Richter, C. F., 1954.Seismicity of the Earth and Related Phenomena. Prinston University Press.
Hallbauer, D. K., Wagner, H. and Cook, N. G. W., 1973. Some observations concerning the microscopic and mechanical behaviour of quartz specimens in stiff triaxial compression tests.Int. J. Rock Mech. Min. Sci. Geomech. Abstr.,10, 713–726.
Huang, D. Y. and Teng, H., 1981. Time and space scanning of parameters of seismicity over a broad region before strong earthquakes.Acta Seismologica Sinica,3, 283–291 (in Chinese).
Ishimoto, M. and Iida, K., 1939. Seismograph for seismic observation.Bull. Earthq. Res. Inst.,17, 443–478 (in Japanese).
Li, Q. L., Hao, B. L., Yu, L. and Chen, J. B., 1979.Time and Space Scanning on the Relationship Between Frequency and Magnitude. Seismological Press, Beijing (in Chinese).
Ma, H. Q., 1978. Variations of theb-values before several large earthquakes occurred in North China.Acta Geophysica Sinica,21, 126–141 (in Chinese).
Mogi, K., 1962. Study of elastic shocks caused by the fracture of heterogeneous materials and its relation to earthquake phenomena.Bull. Earthq. Res. Inst.,40, 125–173.
Mogi, K., 1981.Prospect on the Nature of Earthquakes. Tokyo University Press, p164 (in Japanese).
Sih, G. C., 1980.Mechanics of Fracture.1, Noordhoff International Publishing.
Scholz, C. H., 1968. The frequency-magnitude relation of microfracturing in rock and its relation to earthquakes.Bull. Seism. Soc. Am.,58, 399–415.
Yin, X. C., 1986.Solid Mechanics. Seismological Press, Beijing (in Chinese).
Xin, X. C., Li, S. Y. and Li, H., 1986. Experimental study on the action between the surfaces of a closed crack.Acta Geophysica Sinica,29, Suppl. (in Chinese).
Yin, X. C., Li, S. Y. and Li, H., 1987. On the physical essence ofb value for AE of rock tests and natural earthquakes in terms of fracture mechanics.Acta Seismologica Sinica,9, 364–374 (in Chinese).
Author information
Authors and Affiliations
Additional information
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,9, 393–400, 1987.
Projects sponsored by the Chinese Joint Seismological Science Foundation.
About this article
Cite this article
Li, H., Yin, X., Li, S. et al. The experimental research onb value of AE for the rock specimens with pre-existing crack or notch under uniaxial compression. Acta Seismologica Sinica 5, 867–875 (1992). https://doi.org/10.1007/BF02651035
Issue Date:
DOI: https://doi.org/10.1007/BF02651035