عنوان مقاله [English]
Determining the mechanical and dynamic parameters of the rocks under different environmental conditions of laboratory, device, and rock samples tested. Triaxial test is one of the most useful tests for mechanical behavior of rocks, which be done by advanced servo-controlled devices, can determined important parameters such as mechanical strength, modulus of deformeabilities and variations in the velocity of the wave during loading continuously.
In this paper, at first some of the physical and geological characteristics of two types of clastic rocks (sandstone and tuff) evaluated, and then their mechanical and dynamic parameters determined during servo-controlled triaxial test in different conditions of lateral and axial stress studied. The values of parameters such as modulus of deformeability, the poisson's ratio, and longitudinal and transverse wave velocities, which are usually stated constant, change with increasing axial and lateral stresses during the test, because the sample's behavior changes from elastic to plastic during test. Therefore, providing fixed value for a parameter can't be logical and must specify the conditions for its determination along with the declared number. The results of triaxial test of this study, carried out by the ISRM standard method, show that the resistance values, the modulus of deformeability, the poisson's ratio and the wave velocity of the longitudinal and transverse waves for the sandstone sample are higher than that of the pyroclastic sample, due to the difference in physical properties and the structure and texture of these two rocks. The range of variations of these parameters is different in two specimens.
Al-Shayea, N., 2004. Effects of testing methods and conditions on the elastic properties of limestone rock, Engineering Geology, 74: 139-156.
Arora, V. K., 1987, Strength and deformational behavior of jointed rocks. PhD thesis, IIT Delhi, India.
ASTM, 2004, Standard practices for preparing rock core specimens and determining dimensional and shape tolerances, D 4543 - 04.
ASTM, 2004, Standard test method for triaxial compressive strength of undrained rock Core specimens without pore pressure measurements D 2664 - 04.
ASTM, 2008, Standard test method for laboratory determination of pulse velocities and ultrasonic elastic constants of rock, D2845 - 08.
ASTM, 2014, Standard test methods for compressive strength and elastic moduli of intact rock core specimens under varying states of stress and temperatures, D7012-14.
ASTM, 2001, Standard practice for using significant digits in geotechnical data, D6026 - 01.
Aydan, O., Rassouli, F. & Ito, T., 2011, Multi-parameter responses of Oya tuff during experiments on its time-dependent characteristics, In: Proceedings of the 45th US rock mechanics/Geomechanics Symposium, San Francisco, CA, ARMA. pp. 11–294.
Aydan, O., 2017, Time-dependency in rock mechanics and rock engineering, Taylor & Francis Group, London, UK, V.2, 246 p.
Barton, N., 2007, Rock quality, seismic velocity, attenuation and anisotropy, Taylor & Francis Group, London, UK, 729 p.
Brady, B. H. G., E. T. Brown, 2006, Rock mechanics for underground mining, Third edition, Springer, Netherlands, 626 p.
Brotons, V., Tomás, R., Ivorra, S., Grediaga, A., 2014, Relationship between static and dynamic elastic modulus of a calcarenite heated at different temperatures: the San Julián's stone, Bulletin of Engineering Geology and the Environment, 73: 791-799.
Casper O., Fabricius I.L., Krogsboll A., Prasad M., 2004, Static and dynamic Young’s Modulus for lower Cretaceous chalk: A low frequency scenario, AAPG International Conference: October 24-27, 2004; Cancun, Mexico.
Ciccotii, M., Mulargia, F., 2004, Differences between static and dynamic elastic moduli of atypical seismogenic rock, Geophysical Journal International, 157: 474-477.
Eissa, E.A., Kazi, A., 1988, Relation between static and dynamic Young´s Moduli of rocks, International Jornal of Rock Mechanic and Mining Science, 25:479-482.
Feng, X. T., 2017, Rock Mechanics and Engineering, V. 2: Laboratory and field testing, Taylor & Francis group, London, UK, 631 p.
Franklin, J.A., E. Hoek, 1970, Developments in triaxial testing technique, Rock Mechanics, v. 2, pp. 223-228.
Gercek, H., 2007, Poisson's ratio values for rocks, International journal of rock mechanics and mining sciences, 44-1: 1–13.
Gillespie M.R., Styles M.T., 1999, Classification of igneous rocks. British geological survey research report RR 99–06. BGS rock classification scheme, vol 1.
Goodman, R. E., 1989, Introduction to rock mechanics, John wiley and sons, Canada, 2nd ed., 562 p.
Hashemi Esfahanian, M., 1999, Constitutive modelling of a schistose rock in the Himalaya, PhD thesis, Indian Institue of Technology, New Dehli, India, 226 p.
Heap, M.J., Faulkner, D.R., 2008, Quantifying the evolution of static elastic properties as crystalline rock approaches failure, Int. J. Rock Mech. Min. Sci., 45: 564–573.
Heap, M.J., Vicinguerra, S., Meredith, P.G., 2009, The evolution of elastic moduli with increasing crack damage during cyclic stressing of basalt from Mt. Etna volcano, Tectonophysics, 471: 153-160.
Hoek, E., Brown, E.T., 1980, Empirical strength criterion for rock masses, Journal of the geotechnical engineering division, ASCE, 106(GT9): 1013–1035.
Horsrud, P., 2001, Estimating Mechanical Properties of Shale from Empirical Correlations, Society of Petroleum Engineers, SPE, doi:10.2118/56017-pa.
Hudson, J.A., 1993, Comprehensive rock engineering: principles, practice, and projects, v. 3, Rock testing and site characterization, Pergamon Press Ltd, 994 p.
ISRM: Suggested methods for determining the strength of rock materials in triaxial compression, 1978.
ISRM: Suggested methods for determining the strength of rock materials in triaxial compression, Revised Version, 1983.
ISRM: The complete ISRM suggested methods for rock characterization, testing and monitoring: 1974–2006, in: R. Ulusay, J.A. Hudson (Eds.), Commission on testing methods, International Society of Rock Mechanics, ISRM Turkish National Group, Ankara, 2007, 628 p.
ISRM, Upgraded ISRM suggested method for determining sound velocity by ultrasonic pulse transmission technique, Aydin, A., 2014, pp. 95-100.
Jaeger, j. C., N. G. W. Cook, R. W. Zimmerman, 2007, Fundamentals of Rock Mechanics, Fourth Edition, Blackwell Publishing Ltd, Oxford, UK, 476 p.
King, M.S., 1983, Static and dynamic elastic properties of rocks from the canadian shield, International Journal of Rock Mechanics and Mining Sciences, 20: 237-241.
Kulhawy, F. L. 1975. Stress deformation properties of rock and rock discontinuities, Engineering geology, 9: 327-350.
Lacy, L., 1997, Dynamic Rock Mechanics Testing for Optimized Fracture Designs, Paper SPE 38716 presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 5–8 October.
Lama, R.D., Vutukury, V.S., 1978, Handbook on mechanical properties of rocks, v. 2, Testing techniques and results, Trans tech publications, Clausthal, Germany, 481 p.
Maákowski, P., Ostrowski, A., 2017, The Methodology for the young modulus derivation for rocks and its value, Symposium of the international society for rock mechanics, Procedia engineering, 191: 134 - 141.
Martinez-Martinez, J., Benavente, D., Garcia-del-Cura, M.A., 2012, Comparison of the static and dynamic elastic modulus in carbonate rocks, Bulletin of Engineering Geology and the Environment, 71: 263-268.
McCann, D.M., Entwisle, D.C., 1992, Determination of Young's modulus of the rock mass from geophysical well logs, From Hurst, A., Griffiths, C. M. & Worthington, P. F. (eds), Geological applications of wireline logs II, Geological society special publication, No. 65, pp. 317--325.
Murrel, S.A.F., 1965, The effect of triaxial stress on the strength of rocks at atmospheric temperatures, Geophysics J., 10: 231-281.
Najibi, A.R., Ghafoori, M., Lashkaripour, G.R., 2015, Empirical relations between strength and static and dynamic elastic properties of Asmari and Sarvak limestones: two main oil reservoirs in Iran, Journal of Petroleum Science and Engineering, 126: 78–82.
Ozsan A., Akin M. 2002. Engineerimg geological assess-ment of the proposed Urus Dam, Turkey, Engineering Geology, 66: 271-281.
Pettijohn, F. J., Potter, P. E., and Siever, R., 1972, Sand and sandstone, Springer-Verlag, Inc., New York, p. 618.
Price, N. J., 1958, A Study of rock properties in conditions of triaxial stress, Conference on mechanical properties of non-metallic brittle materials, Butterworth, London, Page 106.
Rahn, P. H., 1996, Engineering Geology: An Environmental Approach, 2nd Edition, Prentice hall, Upper saddle river, USA, 657 p.
Villaseñor, A. P., 2010, Physical and mechanical characterization of altered volcanic rocks for the stability of volcanic edifices, PhD Thesis, Milan university, Italy, 134 p.
Wittke, W., 2014, Rock mechanics based on an anisotropic jointed rock model, Wilhelm ernst & sohn, Berlin, Germany, 875 p.
Xiangtao X., Runqiu H., Hua L., Qiuxiang H., 2014, Determination of poisson’s ratio of rock material by changing axial stress and unloading lateral stress test, Springer Verlag Wien, 5 p., Doi: 10.1007/s00603-014-0586-9.
Xu H. et al, 2016, Characterization of rock mechanical mroperties using lab tests and numerical interpretation model of well logs, Hindawi Publishing Corporation, Mathematical problems in engineering, v. 2016, 13 p.
Yasar E.Y., Erdogan Y., 2004, Correlating sound velocity with the density, compressive strength and Young’s modulus of carbonate rocks, International journal of rock mechanics & mining sciences, 41: 871-875.
Zhang, L., 2005, Engineering properties of rocks, v. 4, Elsevier, 290 p.
Zhaolin, L., Lianguo, W., Yinlong, L., Wenshuai, L., Wang, K., 2018, Experimental investigation on the deformation, Strength, and acoustic emission characteristics of sandstone under true triaxial compression, Advances in materials science and engineering, 16 p.