Rock mass properties - Rocscience Inc.
Mass is conserved, meaning the total rock mass never changes, but transformation between different types of rock occurs. Physical and chemical changes are responsible for the transformations.
Investigation of Discontinuous Deformation Analysis for Application in Jointed Rock Masses Mohammad S. Khan Doctor of Philosophy Department of Civil Engineering University of Toronto 2010 Abstract The Distinct Element Method (DEM) and Discontinuous Deformation Analysis (DDA) are the two most commonly used discrete element methods in rock mechanics. Discrete element approaches are.
The brittle deformation of coal and coal measure is mainly concentrated in the area with high strength coefficient of rock mass and fractal dimension. The faults are well developed in this area, and the deformed coal cannot be distributed regionally, only distributed near the faults locally. It is obvious that deformation of coal and coal measures is not only controlled by the strength.
The aim of the geotechnical assessment was to divide the local rock into easily identifiable types that could be geotechnically evaluated. Two classification systems were used during the quantification of the rock mass types. These are the Rock Mass Rating (RMR) system of Bieniawski (1976) and the Mining Rock Mass Rating.
Numerical simulations of the creep characteristics of the structural plane of rock mass are very useful. However, most existing simulation methods are based on continuum mechanics and hence are unsuitable in the case of large displacements and deformations. The discontinuous deformation analysis method proposed by Genhua is a discrete one and has a significant advantage when simulating the.
This thesis addresses the concept of non-destructive rock mass characterisation using in-situ measurements of the velocity and attenuation of seismic waves. The thesis is divided in to two sections, the first of which considers a comprehensive laboratory study of the phenomena of stress-induced velocity and attenuation anisotropy, whilst the second documents a number of field case studies.
Rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes. Rocks are commonly divided into three major classes according to the processes that resulted in their formation. These classes are (1) igneous rocks, which have solidified from.