Experimental study of the fracturing process in brittle rock
1968; American Geophysical Union; Volume: 73; Issue: 4 Linguagem: Inglês
10.1029/jb073i004p01447
ISSN2156-2202
Autores Tópico(s)Geotechnical and Geomechanical Engineering
ResumoJournal of Geophysical Research (1896-1977)Volume 73, Issue 4 p. 1447-1454 Experimental study of the fracturing process in brittle rock C. H. Scholz, C. H. ScholzSearch for more papers by this author C. H. Scholz, C. H. ScholzSearch for more papers by this author First published: 15 February 1968 https://doi.org/10.1029/JB073i004p01447Citations: 243AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Many small cracking events or microfractures precede fracture in laboratory compression tests on rock. Each event radiates elastic waves. During the compression of granite to fracture, twenty-two of the largest microfracture events were located in space by using first arrivals of S waves detected with a multitransducer array. At about 92% of the fracture stress, a rapid acceleration of microfracturing activity occurred. The location of the events that occurred below this point showed no obvious relation to the eventual fault. At stresses within the region of accelerated activity, however, there was a marked clustering of microfractures on the eventual fault plane. These observations suggest that the approximate time and place of fracture could have been predicted. In the light of the similarity of microfractures and earthquakes, this suggests a possible method for predicting earthquakes. References Brune, J. N., C. Allen, A microearthquake survey of the San Andreas fault system in southern California, Bull. Seismol. Soc. Am., 572, 277, 1967. Mogi, K., Study of the elastic shocks caused by the fracture of heterogeneous materials and its relation to earthquake phenomena, Bull. Earthquake Res. Inst. Tokyo Univ., 40, 125, 1962a. Mogi, K., Magnitude frequency relation for elastic shocks accompanying fractures of various materials and some related problems in earthquakes, Bull. Earthquake Res. Inst. Tokyo Univ., 40, 831, 1962b. Mogi, K., Some discussions on earthquake phenomena from the standpoint of fracture theory, Geophysical Papers Dedicated to Prof. Kenso Sassa, 315– 321, Tokyo, 1963. Mogi, K., Some precise measurements of fracture strength of rocks under uniform compressive stress, Felsmech. Ingenieurgeol., 41, 41, 1966. Oliver, J., A. Ryall, J. N. Brune, D. B. Slemmons, Microearthquake activity recorded by portable seismographs of high sensitivity, Bull. Seismol. Soc. Am., 564, 899, 1966. Savage, J. C., L. Mansinha, Radiation from a tensile fracture, J. Geophys. Res., 6823, 6345, 1963. Scholz, C. H., Microfracturing of rock in compression, Ph.D. thesis,, 160 pp.,Massachusetts Institute of Technology,Cambridge,September1967. Scholz, C. W., Microfracturing and the inelastic deformation of rock in compression, J. Geophys. Res., 734, 1968. Simmons, Gene, Velocity of shear waves in rocks to 10 kilobars, 1, J. Geophys. Res., 696, 1123, 1964. Stauder, W., Seismic evidence of present deformation in island arc structures (abstract), Am. Geophys. Union Trans., 481, 218, 1967. Stauder, W., G. A. Bollinger, The focal mechanism of the Alaska earthquake of March 28, 1964, and of its aftershock sequence, J. Geophys. Res., 7122, 5283, 1966. Watanabe, H., The occurrence of elastic shocks during destruction of rocks and its relation to the sequence of earthquakes, Geophysical Papers Dedicated to Prof. Kenso Sassa, 653– 658, Tokyo, 1963. Citing Literature Volume73, Issue415 February 1968Pages 1447-1454 ReferencesRelatedInformation
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