... tunnels, Layered jointed rock strata, Influencing factors, Support pressures INTRODUCTION In recent years, various urban subway tunnels are increasingly carried out through jointed rock strata in many cities. Rock masses are discontinuous mediums with fissures, fractures, joints, bedding planes...

... Abstract The design and implementation of grouting treatments in rock masses are procedures that require continuous adjustment of parameters and criteria to optimize the results. In this proposal we describe a set of tools that enhance decision-making for this type of jobs particularly in dam...

... rock mass jointed sample rock mechanics isrm13 EFFECT OF SCALE AND STRUCTURE ON THE STRENGTH AND DEFORMABILITY OF ROCKS *L.R. Alejano, J. Arzúa, and I. Pérez-Rey Department of Natural Resources & Environmental Engineering University of Vigo, Spain (Corresponding author: alejano@uvigo.es...

... BALANCE S. García, J.A. López-Molina, V. Castellanos-Pedroza INTELLIGENCE FOR GROUTING BALANCE ABSTRACT Grouting aims to reduce the permeability of rock mass below a predetermined value and has been widely used in rock engineering field for a long time. However, the injection procedure needs several...

... Abstract Type and shape of large dams founded on rock depend upon the expected deformation of their foundation. Their design consequently requires the assessment of the deformability of the rock mass at large scale. Seismic refraction, laboratory tests on rock samples and empirical formulas...

.... Estimating the amount of water ingress is a multi-phase process starting from qualitative and quantitative examination of rock mass. Due to association of uncertainty, vagueness and incompleteness with the monitored data set, particularly resulted from the in situ tests, accounting relevant approaches...

... of a rock slope is investigated by means of the upper bound method of limit analysis. The rock mass is treated as a continuum following Hoek-Brown failure criteria. The stability factor corresponding to the non-linear Hoek-Brown failure criterion is obtained by revising the solution following Mohr-Coulomb...

... their extreme values and the covariances are zero, showing that the mean value principle transforms the discontinuum into a statistically equivalent orthotropic continuum. The application of Discontinuum Mechanics to linear rock masses is simple and direct. It is sufficient to define the motif as the plane...

... Abstract When studying jointed rock mass deformation around underground openings it is of great importance to model correctly the excavation sequence during the numerical simulation. This is because for effective arching mechanism to develop in the roof minute block displacements must take...

... simulations. Introduction High stress in surrounding rock mass can cause serious stability problems such as massive squeezing in soft rock and rock burst in hard rock. It is observed that many conventional rock bolts failed when experiencing large displacement, which implies that they are too stiff...

.... Deb ANALYTICAL MODEL FOR FULLY GROUTED ROCK BOLTS WITH MULTIPLE JOINTS ABSTRACT The stability of underground structures made (especially) in jointed rock mass is of the utmost important to designers, engineers and operators. Rock bolting is generally being practised to reinforce excavation walls...

...., 2012). To gain information about the interaction between TBM and rock mass, a detailed geological documentation including an analysis of the discontinuity pattern and laboratory testing for rock strength characterization are mandatory. Within the last year 16 penetration tests have been performed...

...SHEAR STREGTH ENHANCEMENT OF ROCK MASS DUE TO PASSIVE ROCK BOLTS *L. P. Srivastava and M. Singh Department of Civil Engineering Indian Institute of Technology, Roorkee Roorkee, India - 247667 (*Corresponding author: lpscivil@gmail.com) Innovations in Applied and Theoretical Rock Mechanics Editors...

... Reservoir Characterization constitutive equation inelastic complementary energy rock mass rock mechanics isrm13 Upstream Oil & Gas international journal effective stress Montreal 13th international congress stability long-term stability Zhang reservoir geomechanics mechanism...

... a realistic representation of rock mass deformation and fracturing processes. To date, the FDEM approach has successfully yielded qualitative and quantitative results for several practical rock engineering applications, yet it has lacked the ability to consider the implementation of rock-reinforcement...

... not been observed in situ. At last, the example of Gavet (France) illustrates a discontinuous case of numerical modelling for a good quality but fractured rock mass. Principes Et Methodes De Conception De Grandes Cavernes Hydroelectriques Souterraines Resume Les grandes cavernes souterraines abritant...

...). Critical situations may occur when deep-seated rock slides fail in a rapid manner characterised by very high sliding velocities, and/or when they develop into long run-out rock avalanches. However, many rock slides in foliated crystalline rock masses either do not move at high velocities nor do...

... construction and surrounding rock classification, the uniaxial compressive strength index (Ministry of Water Conservancy, 1995; Ministry of Railways, 1999) is one of the essential parameters of rock mass. Usually, there are two types of the uniaxial compressive strength index, natural and saturation...

... of the rock mass surrounding the tunnel are briefly reviewed in this paper. Two-dimensional as well as threedimensional numerical simulations are conducted to study the tunnel stability. Moreover, the effects of staged excavation and pre-supporting method on controlling the ground movements are studied...

... Abstract A comprehensive geotechnical characterization has been undertaken at the El Teniente mine to describe and determine the rock mass behaviour strength properties of the primary copper ore. The Synthetic Rock Mass (SRM) modelling approach is used to simulate the mechanical behaviour...