This paper compares the deformation modulus of rock measured from laboratory and field tests ... (from four possible measurements, i.e. Young’s modulus E and Poisson’s ratio υ, or shear modulus G and bulk modulus K) for calculations of ... Measurement of Stiffness in Rock from Laboratory and Field Tests
Young’s Modulus, E, is also called the “modulus of elasticity”, “tangent modulus”, or “stiffness”. It is the ratio between stress and strain when rock behaves elastically ( Figure 1 ).
Young’s modulus, E, is the ratio of uniaxial compressive (tensile) stress to the resultant strain Bulk modulus, K , is the change in volume under hydrostatic pressure (i.e., the ratio of stress to strain) ( K is the reciprocal of compressibility.)
THE DEFORMATION MODULUS OF ROCK MASSES - comparisons between in situ tests and indirect estimates ... term modulus of deformation rather than modulus of elasticity or Young's modulus. The commission of ... rock mass. For instance, Farmer and Kemeny (1992) found that the deformation modulus on intact rock samples is in the order of 5 to 20 times ...
Abstract. This report reviews all potentially available Yucca Mountain Project (YMP) data in the Technical Data Management System and compiles all relevant qualified data, including data qualified by this report, on elastic properties, Poisson's ratio and Young's modulus, into a single summary Data Tracking Number (DTN) MO0304DQRIRPPR.002.
At Yucca Mountain, rock properties such as Young's modulus and thermal expansion coefficient have been estimated for both intact rock (based on laboratory tests on samples) and fractured rock mass (based on empirical methods or in situ tests).
Intact Limestone can have a Young's modulus ( E ) . basalt rock bulk modulus. » Learn More. Simple Determination of the Effective Young's Modulus of . A simple procedure for the determination of the effective Young's modulus of rock is presented. The method uses the elastic compliance calibration of fracture . » Learn More. SOIL PROPERTIES ...
elastic modulus, or Young’s modulus, and shear modulus are used when deformations in underground mines need to be computed. Experimentally, the elastic modulus can be determined from the ... and unit weight as input to predict elastic modulus of intact rock. …
Sep 11, 2008· This stress increase will result in deformation of the rock mass, based on the elastic properties of the rock mass. This is a different mechanic from subgrade modulus (i.e., k), which is related to a spring constant in the structural design of slabs on grade.
L 0 L A F E ∆ ∆ = This modulus reflects the stiffness of earth materials. E is the ratio of stress to strain.If our aim is to lengthen or shorten a rock without actually breaking it, the greater the value of E, the larger the stress that is needed to achieve the deformation.
The laboratory tests have been used most frequently to determine Modulus of Elasticity of rocks. The intact core rock samples representing the region were tested to determine their Young's modulus ...
Young’s modulus E and Poisson ratio ν. cf /2. were deduced from the tangent properties at 50% of the peak load.Figure 1-1. Location of all telescopic boreholes drilled up to now (October 2005) within or close to the Forsmark candidate area.
The uniaxial compressive strength and static Young’s modulus (E s) of intact rocks are the most important geotechnical parameters for stability analysis of surface and underground structures. These parameters are obtained by the uniaxial compressive test.
Tensile Modulus - or Young's Modulus alt. Modulus of Elasticity - is a measure of stiffness of an elastic material. It is used to describe the elastic properties of objects like wires, rods or columns when they are stretched or compressed.
The primary intact rock properties commonly applied in blast design are: Elastic constants (Young's Modulus, E and Poisson's Ratio, ν) Strength (uniaxial compressive σc and tensile, σt)
elastic modulus of jointed rock mass from the elastic modulus of corresponding intact rock and joint parameters such as joint frequency, joint inclination and joint roughness. The results this research showed that artificial
5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress conditions under which most underground rock masses exist.
UNESCO – EOLSS SAMPLE CHAPTERS ENVIRONMENTAL AND ENGINEERING GEOLOGY – Vol. III - Characterization of Geologic Materials - Abdul Shakoor ©Encyclopedia of Life Support Systems (EOLSS) CHARACTERIZATION OF GEOLOGIC MATERIALS Abdul Shakoor Department of Geology, Kent State University, Kent, Ohio, 44242, U.S.A.
The elastic modulus of intact rock is used for many rock engineering projects, such as tunnels, slopes, and foundations, but due to the requirements of high-quality core samples and associated sophisticated test equipment, instead the use of empirical models to obtain this parameter has been an attractive research topic.
The uniaxial compressive strength and static Young's modulus (Es) of intact rocks are the most important geotechnical parameters for stability analysis of surface and underground structures.
This test method covers the determination of elastic moduli of intact rock core specimens in uniaxial compression. It specifies the apparatus, instrumentation, and procedures for determining the stress-axial strain and the stress-lateral strain curves, as well as Young's modulus, E, and Poisson's ...
to determine Young‟s modulus, Poisson‟s ratio, and failure envelop. In addition, multistage triaxial shear ... To obtain the required mechanical properties of intact rock and rock joints, it is necessary to measure the ... when the state of weathering of intact rock material and the joint walls is similar. Otherwise, the Schmidt hammer ...
The slope of the boundary lines represent the modulus ratio, MR (eq.1) which was introduced by (1968) and expresses the ratio of Young’s modulus Ei and the uniaxial compressive strength of intact rock σci: Ei MR (1) ci The range of the ratio for the sedimentary, metamorphic rocks types is shown in figure 1.
Mechanical properties of shale-gas reservoir rocks — Part 2: Ductile creep, brittle strength, and their relation to the elastic modulus ... kerogen and intact rock strength, frictional strength, and visco- ... we are able to determine the vertical Young’s modulus E 3 and Poisson’s ratio v 31 from the vertical samples and the hori-
Basalt Rock Bulk Modulus - ramdevpgcollege.org. Values of tensile and cohesive strength for the basaltic rock mass are . for intact rock, the Young's (elastic) modulus and Poisson's.
In particular, the determined deformation modulus of a rock mass may be larger than Young''s modulus of the intact rock, even where the rock mass is jointed and should intuitively have a deformation modulus that is less than that of the intact rock...
I calculated the young's Modulus of an intact Rock by UCS. Stress/Strain at max. so what is it's proper unit when stress is kg/cm2 and strain in mm and is it ri E Young's Modulus of Intact Rock and its unit.
The modulus of elasticity of intact rock ( Ei) is an important rock property that is used as an input parameter in the design stage of engineering projects such as dams, slopes, foundations, tunnel...
Many models have been proposed to estimate the Young's modulus, E, of intact rock based on its uniaxial compressive strength, UCS. 's model, i.e., E = M R ⋅ UCS (where M R is the modulus ratio), is the most accepted one. However, traditional models cannot provide uncertainty estimates of parameters and predictions.
the dynamic Young's modulus, Ed, Poisson's ratio
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