Darlington, WJ, Ranjith, PG, Choi, SK & Kodikara, J 2008, 'The Acoustic Emission Response of Intact Quartzite Under Uniaxial Compression', in Y Potvin, J Carter, A Dyskin & R Jeffrey (eds), Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium
, Australian Centre for Geomechanics, Perth, pp. 533-542, https://doi.org/10.36487/ACG_repo/808_33
This paper presents the results of uniaxial compression tests conducted on quartzite samples. The tested quartzite samples consisted of 83 mm diameter cores that were cut to a length roughly twice their diameter. The specimens were cored from a depth of between 68–78 m. The stress–strain and acoustic emission (AE) responses were monitored throughout the tests. The results obtained for the intact specimens are believed to be typical, and are in general agreement with the results of other researchers. The tests produced a recognisable AE peak prior to the peak axial strength of the specimen being reached. The axial stress at which this AE peak occurs corresponds to a value of around 90% of the specimen’s UCS (unconfined compressive strength). This is due to the formation of new fractures and shear mobilisation of established failure planes prior to failure that emits large amounts of AE energy.
ASTM (2001) Standard practices for preparing rock core specimens and determining dimensional and shape tolerances, Annual Book of ASTM Standards, Designation: D4543–01, ASTM International, West Conshohocken, Pennsylvania, 5 p.
ASTM (2004) Standard test method for compressive strength and elastic moduli of intact rock core specimens under varying states of stress and temperatures, Annual Book of ASTM Standards, Designation: D7012–04, ASTM International, West Conshohocken, Pennsylvania, 8 p.
Bieniawski, Z.T. (1967) Mechanics of brittle rock fracture: Part 1 – Theory of the fracture process, Int. J. Rock Mech. Min. Sci. and Geomech. Abstr., 4(4), pp. 395–406.
Brace, W.F. (1964) Brittle fracture of rocks, State of Stress in the Earths Crust: Proceedings of the International Conference, Judd, W.R. (editor), American Elsevier, Santa Monica, pp. 110–178.
Chang, S-H. and Lee, C-I. (2004) Estimation of cracking and damage mechanisms in rock under triaxial compression by moment tensor analysis of acoustic emission, Int. J. Rock Mech. Min. Sci., 41, pp. 1069–1086.
Cox, S.J.D. and Meredith, P.G. (1993) Microcrack formation and material softening in rock measured by monitoring acoustic emissions. Int. J. Rock Mech. Min. Sci. and Geomech. Abstr. 30(1), pp. 11–24.
DECI (2000) Manual For Setup and Operation of AESMART 2000 Acoustic Emission System, Duegan Engineering Company Inc., San Juan Capistrano, California, 7 p.
Eberhardt, E., Stead, D. and Stimpson, B. (1999) Effects of sample disturbance on the stress induced microfracturing characteristics of brittle rock, Can. Geotech. J., 36, pp. 239–250.
Eberhardt, E., Stead, D., Stimpson, B. and Read, R.S. (1997) Changes in acoustic event properties with progressive fracture damage, Int. J. Rock Mech. Min. Sci., 34(3–4), 071B.
Eberhardt, E., Stead, D., Stimpson, B. and Read, R.S. (1998) Identifying crack initiation and propagation thresholds in brittle rock, Can. Geotech. J., 35, pp. 222–233.
Filimonov, Y., Lavrov, A. and Shkuratnik, V. (2005) Effect of confining pressure on acoustic emission in ductile rock, Strain, 41, pp. 33–35.
Kusunose, K., Lei, X., Nishizawa, O. and Satoh, T. (1991) Effect of grain size on fractal structure of acoustic emission hypocenter distribution in granitic rock, Phys. Earth Plant. Interior, 67, pp. 194–199.
Lei, X., Kusunose, K., Satoh, T. and Nishizawa, O. (2003) The hierarchical rupture process of a fault: an experimental study. Physics of the Earth and Planetary Interiors, 137, pp. 213–228.
Lockner, D.A., Byerlee, J.D., Kuksenko, V., Ponomarev, A. and Sidorin, A. (1991) Quasi-static fault growth and shear fracture energy in granite, Nature, 350, pp. 39–42.
Lockner, D.A. (1993) The role of acoustic emission in the study of rock fracture, Int. J. Rock Mech. Min. Sci. Geomech., 30, pp. 883–899.
Prikryl, R., Lokajicek, C., Li, C. and Rudajev, V. (2003) Acoustic emission characteristics and failure of uniaxially stressed granitic rocks: the effects of rock fabric, Rock Mech. Rock Engng., 36(4), pp. 225–270.
Ranjith, P.G., Jasinge, D., Song, J.Y. and Choi, S.K. (2008) A Study of the effect of displacement rate and moisture content on the mechanical properties of concrete: Use of acoustic emission, Mechanics of Materials, 40, pp. 453–469.
Rudajev, V., Vilhelm, J., Kozak, J. and Lokajicek, T. (1994) Complex analysis of acoustic emission from loaded rock samples, Progress in Acoustic Emission VII, Proceedings of The 12th International Acoustic Emission Symposium, T. Kishi, Y. Mori and M. Enoki (editors), The Japanese Society for NDI, Sapporo, Japan, pp. 243–248.
Yoshikawa, S. and Mogi, K. (1981) A new method for estimation of the crustal stress from cored rock samples: Laboratory study in the case of uniaxial compression, Tectonophysics, 74, pp. 323–339.