Journal ArticleDOI
Strength of a Model of Jointed Rock
Edwin T. Brown,D. Hugh Trollope +1 more
TLDR
In this paper, triaxial compression tests were carried out on idealized samples containing sets of preformed discontinuities inclined at various angles to the sample axes, and four major modes of failure were: axial cleavage fractures at low confining pressures, shear failure through the plaster and across joint planes, slip on joint planes and ductile failure.Abstract:
In an attempt to extend the presently limited state of knowledge of the strength of jointed rock masses, triaxial compression tests were carried out on idealized samples containing sets of preformed discontinuities inclined at various angles to the sample axes The 4 in by 4 in by 8 in samples were built up from one in cubes of a high strength gypsum plaster Triaxial tests were carried out on 5 sample types at each of 5 confining pressures in the range of 0 to 2000 psi The four major modes of failure were: (1) axial cleavage fractures at low confining pressures, (2) shear failure through the plaster and across joint planes, (3) slip on joint planes, and (4) ductile failure The strengths of block-jointed samples failing by mode (2) were less than those of the corresponding unjointed samples At the higher confining pressures of mode (4), the strengths were higher than those of the unjointed samples and were unaffected by joint orientation Friction parameters determined from tests in which mode (3) applied were the same as those determined for the plaster in direct shear tests Mohr's circle envelopes were curved, and could be described by a power law in which the normal stress index varied with joint orientationread more
Citations
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Journal ArticleDOI
Understanding jointed rock mass behaviour using a ubiquitous joint approach
V.N. Kazakidis,M.S. Diederichs +1 more
TL;DR: In this paper, a "ubiquitous joint" method of manipulating linear elastic numerical modeling data from mining case studies is presented, which uses information obtained from underground observations, geomechanical mapping, and micro-seismic monitoring, to identify the critical slip angle, slip potential and slip direction of pre-existing planes of weakness in anisotropic jointed rock masses.
Dissertation
Characterization of Rockmass Properties and Excavation Damage Zone (EDZ) Using A Synthetic Rock Mass (SRM) Approach
TL;DR: In this paper, the authors present a list of co-authorship, acknowledgements and acknowledgements for the authors of the book, as well as a collection of tables and abbreviations.
Journal ArticleDOI
Strength and failure characteristics of jointed marble under true triaxial compression
TL;DR: In this paper, a series of true triaxial compression tests are conducted on jointed marble (50×× 50×× 100mm3) containing a natural stiff joint, taken from the China Jinping Underground Laboratory (CJPL-II) project.
Journal ArticleDOI
Modulus Ratio and Joint Factor Concepts to Predict Rock Mass Response
TL;DR: In this article, the modulus ratio concept is considered to present a unified classification for intact rocks and rock masses, and compressive strength, elastic modulus, cohesion and friction angle were estimated and applied in the analyses of a few cases.
Journal ArticleDOI
Investigation of mechanical properties of jointed granite under compression using lattice-spring-based synthetic rock mass modeling approach
Subash Bastola,Ming Cai,Ming Cai +2 more
TL;DR: In this article, the mechanical properties of laboratory scale jointed granite with both planar and non-planar joints of different joint configurations are investigated using the lattice-spring-based synthetic rock mass (LS-SRM) modeling approach.