Numerical investigation of EDZ development around a deep polymetallic ore mine
Abstract
This paper deals with the development of a non-linear constitutive model of rock mass and its verification to predict a damaged zone. Simulations of triaxial compressions provide a verification of the implementation with a good agreement between predictions and theoretical values of peak and residual strengths as well as the transition between brittle failure and ductile response. The applicability of the model to predict potential failure around stopes of a deep polymetallic ore mine is checked and highlighted the interest to consider more realistic rheology of hard rock masses compared with the elastic perfectly plastic models of underground deep mines.
References
Edelbro C. (2008). Strength, fallouts and numerical modeling of hard rock masses. Doctoral thesis 2008:56, Lulea University of Technology, 80p.
Haimson B (2006) True triaxial stresses and the brittle fracture of rock. Pure Applied Geophysics. Volume 163(5–6), pp.1101–1130.
Hoek E. and Brown ET. (1980). Underground excavations in rock. The Institution of Mining and Metallurgy, London.
Horii H and Nemat-Nasser S (1986). Brittle failure in compression: splitting, faulting and brittle-ductile transition. Philos. Trans. R. Soc. (London), Series A, Vol. 319, pp. 337-374.
Priest SD (2005). Determination of shear strength and three-dimensional yield strength for the Hoek–Brown criterion. Rock Mechanics and Rock Engineering. Volume 38(4), pp. 299–327.
Souley M., Armand G., Su K. and Ghoreychi M., (2011). Modelling of the viscoplastic behaviour including damage for deep argillaceous rocks, Physics and Chemistry of the Earth, 36, 1949–1959.
Steif P.S. (1984). Crack extension under compressive loading. Engineering Fracture Mechanics. Volume 20(3), pp. 463-473.
van Koppen M.J.G. (2008). Estimation of the Risk for Mine Induced Seismicity in Large Scale Mining in the Garpenberg Mine. Master of Science, Delft University of Technology, Netherlands.
Zhang L (2008). A generalized three-dimensional Hoek–Brown strength criterion. Rock Mechanics and Rock Engineering. Volume 41(6), pp. 893–915.
Zhu Q. Z., Kondo D. and Shao J. F. (2009). Homogenization-based analysis of anisotropic damage in brittle materials with unilateral effect and interactions between microcracks. Int J of Num and Anal Methods in Geomech. Volume 33, pp. 749–72.
