Some New Correlations of Q-Value with Rock Mechanics Parameters in Underground Oil Storage Caverns

Fang Lin, Hebing Luan, Yanhua Zeng, Zhibin Zhong


Q-system is a preferred alternative method of rock mass classification for underground oil storage caverns where stable lithological rocks are widely distributed. In this paper, correspondences between important input rock mechanics parameters (friction angle, cohesion, tensile strength, Poisson’s ratio, deformation modulus) and Q values were investigated, thereby bringing convenient to rapidly obtain available parameters when it’s hard to collect measured field data in underground storage projects basically with similar lithology. The proposed correlations were verified through numerical simulation and on-site monitoring measurement. In addition, comparison of different criteria among Q-system and other codes for rock mass classification has been made to help for making a preliminary evaluation of rock mass quality in the practical engineering. Finally, the behaviours of surrounding rock deformations under different Q values were analysed by using FLAC3D code with the calculating parameters suggested in this paper, and the calculation results match well with measured values in situ. Above results will not only guide the construction but also could be relevant to other underground storage engineering under similar geological conditions.


Underground Oil Storage Caverns; Rock Mechanics Parameters; Q-System.


Bai, Y., D. Q. Zhou, and P. Zhou. "Modelling and analysis of oil import tariff and stockpile policies for coping with supply disruptions." Applied energy 97 (2012): 84-90.

Lin, Fang, et al. "TEM improves groundwater inflow estimates in undergound storage." Oil & Gas Journal 113.11 (2015): 78-87.

Goel, Rajnish K., Bhawani Singh, and Jian Zhao. Underground infrastructures: planning, design, and construction. Butterworth-Heinemann, 2012.

Lin, Fang, et al. "Effectiveness analysis of water-sealing for underground LPG storage." Tunnelling and Underground Space Technology 51 (2016): 270-290.

Terzaghi, Karl. "Rock defects and loads on tunnel supports." (1946).

Deere, Don U. Technical description of rock cores for engineering purposes. University of Illinois, 1962.

Bieniawski, Zdzisław Tadeusz. Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering. John Wiley & Sons, 1989.

Bieniawski, Zdzislaw T. Rock mechanics design in mining and tunnelling. No. Monograph. 1984.

Bieniawski, Z. T. "Engineering classification of jointed rock masses." Civil Engineer in South Africa 15.12 (1973).

Barton, N., Lien, R., & Lunde, J. “Engineering classification of rock masses for the design of tunnel support. Rock Mechanics Felsmechanik M canique des Roches” (1974): 6, NO. 4, 189-236.

Whickham, G. E., H. R. Tiedemann, and E. H. Skinner. "Support determination based on geological predictions." Proceeding of the North American Rapid Excavation and Tunnelling Conference. Vol. 1. 1972.

Hoek, Evert, and Edwin T. Brown. "Practical estimates of rock mass strength." International Journal of Rock Mechanics and Mining Sciences 34.8 (1997): 1165-1186.

Dhawan, A. K., and A. B. Joshi. "The Basic Approach to New Austrian Tunnelling Method." Symposium on Tunnelling, 52nd Board Session, CBIP. New Delhi. 1982.

Grimstad, E. & Barton, N. Updating of the Q-System for NMT. Proceedings of the International Symposium on Sprayed Concrete-Modern Use of Wet Mix Sprayed Concrete for Underground Support, Fagernes, 1993, (Eds Kompen, Opsahl and Berg. Norwegian Concrete Association, Oslo).

Barton, N. “Some new Q-value correlations to assist in site characterisation and tunnel design”. International Journal of Rock Mechanics and Mining Sciences (2002): 39, NO. 2, 185-216.

Goel, R. K., J. L. Jethwa & A. G. Paithankar. “Indian experiences with Q and RMR systems”. Tunnelling and Underground Space Technology (1995): 10, 97-109.

Choi, S. Y., & Park, H. D. (2002). Comparison among different criteria of RMR and Q-system for rock mass classification for tunnelling in Korea. Tunnelling and Underground Space Technology, 17, NO. 4, 391-401.

Palmström A. “Combining the RMR, Q, and RMi classification systems”. Tunnelling and Underground Space Technology. (2009): 24(4): 491-492

Tzamos S, Sofianos A I. “A correlation of four rock mass classification systems through their fabric indices”. International Journal of Rock Mechanics and Mining Sciences (2007): 44(4): 477-495.

Laderian, A. & M. A. Abaspoor. “The correlation between RMR and Q systems in parts of Iran”. Tunnelling and Underground Space Technology (2011): 27, 149-158.

Palmström, A., & E. Broch. “Use and misuse of rock mass classification systems with particular reference to the Q-system”, Tunneling and Underground Space Technology (2006): 21, NO. 6, 575-593.

Anderson, T.L. Fracture Mechanics. CRC Press, second edition. Boca Raton, Florida. (1995).

Read SAL, Richards LR, Perrin ND. “Applicability of the Hoek–Brown failure criterion to New Zealand greywacke rocks”. In: Vouille G, Berest P, editors. Proceedings of the nineth international congress on rock mechanics, Paris, August, (1999): 2. 655–60.

Mitri, H. S.; Edrissi, R. Henning, J. G. “Finite element modeling of cablebolted stopes in hard rock ground mines”. SME Annual Meeting, (1994):14-17. New Mexico, Albuquerque.

Hoek, E., & Diederichs, M. S. “Empirical estimation of rock mass modulus”. International Journal of Rock Mechanics and Mining Sciences (2006): 43, NO. 2, 203-215.

Hoek, E., Brown, E.T. “Practical estimates of rock mass strength. International Journal of Rock Mechanics and Mining Science”. (1997): 34, NO. 8, 1165–1186.

Rutledge, J.C., Perston, R.L. “Experience with engineering classifications of rock”. In: Proc. Int. Tunnelling Sym., Tokyo, (1978): pp. A3.1–A3.7.

Moreno Tallon, E. Application de Las Classificaciones Geomechnicas a Los Tuneles de Parjares, II Cursode Sostenimientos Activosen galeriasy Tunnels. Foundation Gomez-Parto, Madrid (Singh and Goel, 1999), 1980.

Cameron-Clarke, I.S., Budavari, S. “Correlation of rock mass classification parameters obtained from bore core and insitu observations”. Engineering Geology (1981): 17, 19–53.

Abad, J., Caleda, B., Chacon, E., Gutierrez, V., Hidlgo, E. “Application of geotechnical classification to predict the convergence of coal mine galleries and to design their supports”. In: 5th Int. Congress on Rock Mech., Melbourne, (E) (1984): pp. 15–19.

Bieniawski, Z.T. Rock Mechanics Design in Mining and Tunnelling. A.A. Balkema, Rotterdam (1984).

Gercek, H. “Poisson’s ratio values for rocks”. International Journal of Rock Mechanics and Mining Sciences (2007): 44, 1-13.

Min, K.-B., Jing, L. “Stress Dependent Mechanical Properties and Bounds of Poisson’s Ratio for Fractured Rock Masses Investigated by a Dfn-Dem Technique”. International Journal of Rock Mechanics and Mining Sciences (2004): 41, NO. 3, CD-ROM.

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