Showing papers in "International Journal of Rock Mechanics and Mining Sciences in 2005"

TL;DR: In this paper, it was shown that linear Mogi's triaxial failure criterion does a good job in representing rock failure under polyaxial stress states when σ 2 = σ 3.

TL;DR: In this paper, the authors present a synthesis of the ideas and issues that emerged from presentations and discussions on EDZ in these four rock types at a CLUSTER Conference and Workshop held in Luxembourg in November 2003.

TL;DR: In this article, the loading frequency and amplitude of the sandstone samples obtained from a rockburst prone coal mine and studied under dynamic uniaxial cyclic loading in the laboratory is presented.

TL;DR: In this paper, the authors provide a detailed analysis of published test data with a view to proposing a sufficiently significant but conveniently simple formulation of the dilatancy angle that reflects these dependencies and that can be readily implemented in numerical codes.

TL;DR: In this paper, the authors compared the performance of full steel bars as opposed to the frictional Swellex and showed that the two bolt types deform in dissimilar ways, responding very differently to shear load.

TL;DR: In this paper, a geothermal research well was used to enhance the inflow performance of a clastic sedimentary reservoir section, and two isolated borehole intervals were created in two isolated Borehole intervals.

TL;DR: In this paper, the authors introduce the hydrogeological conditions of coal mines and the potential water inrush disasters from aquifers under coal seams, and present the water in rush mechanism.

TL;DR: In this article, results of 3D modeling of the top-coal-caving mechanism by using the finite difference code FLAC3D at the M3 longwall panel of the Omerler Underground Mine located at Tuncbilek (Turkey) are presented.

TL;DR: In this article, the authors studied the relationship between elastic wave velocities and volumetric strain in a set of deformation experiments of Bleurswiller sandstone and showed that although the three sets are correlated, they are not systematically correlated.

TL;DR: In this paper, the authors report simultaneous laboratory measurements of seismic velocities and fluid permeability on lava flow basalt from Etna (Italy) and columnar basalt (Seljadur) from Seljadur (Iceland).

TL;DR: In this article, a simple exact solution is presented for the elastic-brittle-plastic plane strain analysis of displacements around circular openings in an isotropic Hoek-Brown rock subjected to a hydrostatic in situ stress.

TL;DR: In this article, the authors performed compaction experiments on crushed limestone and granular calcite at room temperature and 1-4-MPa effective stress using various pore fluids and found that the main deformation mechanism in calcite under their experimental conditions was pressure solution and that diffusion is likely to be the rate-controlling process in pure solution system.

TL;DR: The relationship between thermal conductivity and other petrophysical properties has been analyzed for a borehole drilled in a Tertiary Flysch sequence in this paper, where the authors established equations that permit them to predict rock thermal conductivities from logging data.

TL;DR: In this paper, the authors examined whether natural daily surface temperature changes could have played a role in the occurrence of a rockfall on the Rochers de Valabres slope in France's Southern Alps region.

TL;DR: In this paper, the use of the geological strength index (GSI) for the characterisation of tectonically undisturbed sedimentary rocks is discussed, and two GSI charts are proposed for estimating the mechanical properties of these masses: one mainly for tunnels; and the second for surface excavations.

TL;DR: In this paper, the authors considered the strength envelope of rock masses is considered to follow a modified Hoek-Brown failure criterion that is a nonlinear failure criterion, and two different kinds of techniques are used to develop the ultimate bearing capacity in the framework of limit analysis in plasticity.

TL;DR: The FEBEX (Full-scale Engineered Barriers Experiment in Crystalline Host Rock) test was installed at the Grimsel Test Site underground laboratory (Switzerland) and is a near-to-real scale simulation of the Spanish reference concept of deep geological storage in crystalline host rock.

TL;DR: In this paper, the authors investigated subcritical crack growth in andesite using RLX method of the double torsion (DT) test, and the results showed that crack growth was facilitated at higher water vapor pressures.

TL;DR: In this paper, a fracture mechanics model is developed to simulate the time-dependent failure of intact segments along discontinuities, referred to as rock bridges, and the resulting first-order differential equation for joint cohesion is implemented into the UDEC distinct element numerical code to model timedependent drift degradation.

TL;DR: In this article, a large-scale underground thermal test (Drift Scale Test-DST) in fractured volcanic tuff resulted in changes to water and gas chemistry as well as mineral precipitation and dissolution in fractures.

TL;DR: In this article, the relationship between pore space anisotropy and petrophysical properties was investigated using magnetic susceptibilities and acoustic wave velocities under ambient laboratory conditions.

TL;DR: In this paper, the authors used four different numerical models to simulate and predict coupled thermal-hydrological-mechanical (THM) processes at the Yucca Mountain Drift Scale Test (DST).

TL;DR: In this paper, a strategy for calibration is outlined and results from tests with artificial rock-like materials are presented, which consist of spherical grains (glass beads) while the numerical simulations were performed with PFC 3D, which uses spherical particles as its basic elements.

TL;DR: In this paper, the shape and spatial distribution of both grains and voids were determined by computer image processing, measurement of magnetic anisotropy coupled with ferrofluids and stereological analysis.

TL;DR: In this article, the authors investigated electrical potential and acoustic emissions signals associated with rock deformation in a triaxial deformation cell with a confining pressure simulating depth of 40 MPa, pore pressures ranging 5-35 MPa and strain rates 10(-7)10(-4) s(-1).