Abstract
Maximum amplitude of acoustic emission events in 10 second intervals were measured in the samples of dolomite and sandstone under uniaxial compressive load. The observed sudden increase of the maximum amplitude, in a function of load, indicates the beginning of the unstable propagation of microfractures, leading to uncontrolled failure of a sample. The maximum amplitude dependence on load, as directly related to the AE source mechanism, can be used in prediction of the rock damage in situ.References
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[2] K. KUSUNOSE, K. YAMAMOTO, T. HIRASAWA, Source process of microfracture in granite with reference to earhquake prediction, Sci. Rep. Tohouku Univ. Ser. 5, Geophysics 26, 3-4, 111-121 (1980).
[3] D. LOCKNER, J. BYERLLEE, Acoustic emission and fault formation in rocks, Proc. First. Conf. on AE/MA in Geologic Structures and Materials, The Pensylwania State University, Trans. Tech. Publ. 1977, p. 13.
[4] A. E. LORD, Jr and R. M. KOERNER, Acoustic emission in geological materials, Journal of Acoustic Emission, 2, 3, 195-219 (1983).
