Determination strength parameters rock masses jajarm tunnel based on geotechnical study

Paper Details

Research Paper 01/06/2014
Views (147) Download (4)

Determination strength parameters rock masses jajarm tunnel based on geotechnical study

Dadkhah Rasool, Hoseeinmirzaee Zahra
J. Bio. Env. Sci.4( 6), 495-502, June 2014.
Certificate: JBES 2014 [Generate Certificate]


The Jajarm tunnel will be built in Alumina mine area, located in 20 km of north of Jajarm city in north east of Iran. This tunnel is 4.8 m in height and 800 m in length and is mainly excavated on sedimentary rocks of the Carboniferous age, Triassic age and Jurassic age. This paper discusses the results of geotechnical survey carry out at the propose Jajarm tunnel. Geotechnical information obtains from field study and the field study includes engineering geological and surface discontinuity mapping. The rock units were classified by RMR, Q-system and GSI. According to results from RMR and the Q-system are shown Mobarak unit and Elika unit are classified as good rock masses and Shemshak unit is classified as poor rock masses. In this study, rock mass strength parameters were estimated by using the Hoek-Brown equation and rock classification. Results of rock mass classifications RMR and Q produces a higher Rock mass modulus compared with the results of the Hoek-Brown equation.


Barton N. 2002. Some new Q-value correlations to assist in site characterization and tunnel design. Int. J. Rock Mech. Mining Sci., 39, 185– 216.

Barton N, Loset Lien R, Lunde J. 1980. Application of Q-system in design decisions concerning dimensions and appropriate support for underground installations . Subsurface Space, International Symposium- Rockstore 80, Stockholm, Sweden, ed. M. Bergman, 2, 553-61.

Bieniawski ZT. 1978. Determining rock mass deformability—experience from case histories. Int J Rock Mech Min Sci Geomech Abstr, 15.

Bieniawski ZT. 1989. Engineering Rock Mass Classifications. Wiley, New York. 251.

Cai M, Kaiser PK, Tasaka Y, Minami M. 2007. Determination of residual strength parameters of jointed rock masses using the GSI system Original Research Article. International Journal of Rock Mechanics and Mining Sciences. 44(2), 247-265.

Goodman R. 1989. Introduction to Rock Mechanics. 1st Edn., John Wiley and Sons, New York, 23, 531-538.

Grimstad E, Barton N. 1993. Updating the Q-System for NMT. In: Kompen, Opsahl, Berg (Eds.), Proc. Int. Symp. on Sprayed Concrete-Modern Use of Wet Mix Sprayed Concrete for Underground Support, Fagernes, Norway, Norwegian Concrete Association, Oslo, 20 p.

Hassani H, Arshadnejad S, Khodadadi H, Goodarzi N. 2008. 3D numerical modeling of a couple of power intake shafts and head race tunnels at vicinity of a rock slope in siah bishe pumped storage dam, North of Iran. Journal of Applied Science. 8, 4294-4302.

Hoek E, Carranza-Torres CT, Corkum B. 2002, Hoek-Brown failure criterion: 2002 edition. In Hammah, Bawden, Curran & Tlesnicki (eds.), Proc. Of the 5th North American rock mech. Symp. Toronto, 7-10 July. University of Toronto Press. 267-274.

Hoek E, Kaiser PK, Bawden WF. 1995. Support of Underground Excavations in Hard Rock. Balkema, Rotterdam.

Hoek E, Diederichs MS. 2006. Empirical estimation of rock mass modulus. International Journal of Rock Mechanics and Mining Sciences, 43, 203–215.

ISRM. 1981. Suggested Methods for the Quantitative Description of Discontinuities in Rock Masses. Rock Characterization, Testing and Monitoring, London. Pergamon, Oxford, 221.

Justo C, Justo E, Azañón JM, Durand P, Morales A. 2010. The Use of Rock Mass Classification Systems to Estimate the Modulus and Strength of Jointed Rock. Rock Mechanics and Rock Engineering 43(3), 377.

Lashkaripour GR, Ghafoori M. 2002. The engineering geology of the Tabarak Abad Dam. Engineering Geology, 66, 233–239.

Marinos V, Marinos P, Hoek E. 2005. The geological Strength index: applications and limitations, Bull. Eng. Geol. Environ., 64, 55-65

Pantelidis R. 2009. Rock slope stability assessment through rock mass classification systems. International Journal of Rock Mechanics & Mining Sciences. 46, 315–325.

Pells PJ, Bertuzzi R. 2007. Discussion on article titled ‘‘Use and misuse of rock mass classification systems with particular reference to the Q-system’’ by Palmstrom and Broch [Tunnelling and Underground Space Technology, 21 (2006) 575–593]. Tunnelling and Underground Space Technology. 23, 340–350.

Ramamurthy T. 2003. A geo-engineering classification for rocks and rock masses. International Journal of Rock Mechanics & Mining Sciences. 41, 89–101.

Serafim JL, Pereira JP. 1983. Consideration of the geomechanical classification of Bieniawski. Proc. Int. Symp. On Engineering Geology and Underground Construction, Lisbon, 1, 33– 44.