elastic modulus of intact rock

THE DEFORMATION MODULUS OF ROCK MASSES

2. ON DEFORMATION AND ELASTIC MODULI 2.1 Definitions Deformability is characterized by a modulus describing the relationship between the applied load and the resulting strain. The fact that jointed rock masses do not behave elastically has prompted the usage of the term modulus of deformation rather than modulus of elasticity or Young's modulus.

Published in: Tunnelling and Underground Space Technology · 2001Authors: Arild Palmstrom · Rayman Preet SinghAbout: Young's modulus · Rock blasting · Test method · In situ · Deformation

Estimation of Elastic Modulus of Intact Rocks by ...

Mar 10, 2012 · The modulus of elasticity of intact rock (E i) 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 constructions and mining excavations. However, it is sometimes difficult to determine the modulus of elasticity in laboratory tests because high ...

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(PDF) Empirical Estimation of Intact Rock Elastic Modulus

The modulus of elasticity of intact rock (E) is an important rock property which is used as input parameter in the design stage of engineering projects such as slopes, tunnel and mining excavations.

WHAT ARE THE VALUES OF MODULUS OF ELASTICITY &

Modulus of Elasticity of Rock Modulus of elasticity of rocks depend upon several factors, such as, Type of rock Porosity Grain size Water content Value of modulus of elasticity can be determined by static or dynamic methods. Higher value of modulus of elasticity indicates good quality rock having sound composition. Typical values of modulus of []

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES

At any stress level in region AB, the rock will follow a path essentially parallel to AB upon unloading and reloading. In that domain, the rock sample can be modeled as a spring. If the rock is isotropic, two elastic constants can be introduced to describe its deformability: the Young's modulus, E, and the Poisson' s ratio, <, with and

Published in: International Journal of Rock Mechanics and Mining Sciences & Geomechanics AbstrAuthors: G I Ofoegbu · J H CurranAffiliation: University of TorontoAbout: Deformation · Constitutive equation · Cracking · Shear strength · Triaxial shear test · S

ASTM D7012

D7012-14e1 Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures . ... 1.6 For an isotropic material in Test Methods B and D, the relation between the shear and bulk moduli and Young's modulus

Rock mechanical properties

Mechanical Properties of RockComputing Mechanical Rock PropertiesReferencesNoteworthy Papers in OnePetroExternal LinksSee AlsoMechanical properties include: 1. Elastic properties (Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio) [See Stress strain relationships in rocks for calculations of these properties] 2. Inelastic properties (fracture gradient and formation strength)Elasticity is the property of matter that causes it to resist deformation in volume or shape. Hooke’s law describes the behavior of elastic materials and states that for small deformations, the resulting strain is proportional to...

Standard Test Method for Elastic Moduli of Intact Rock ...

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 ratio, .

MODULUS OF ELASTICITY DETERMINATION OF ROCKS USING ...

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 ...

Intact Rock

Intact rock refers to the unfractured blocks between discontinuities in a typical rock mass. ... Variation of normalized elastic modulus (E/E 0) with temperature (E 0 is the elastic modulus of rock at the lowest test temperature for each data set). Δ, British granite ...

Estimating in situ rock mass strength and elastic modulus ...

Jun 21, 2018 · Variations in rock mass elastic modulus are qualitatively similar (values vary from 1 to 2 GPa up to the elastic modulus of the intact rock, 40 GPa). Our study highlights that macrofractures and joints reduce rock mass strength and should be considered when assessing the rock mass for well stability and rock mass deformation due to stress ...

INFLUENCE OF INTACT ROCK STRENGTH ON ROCK MASS

samples. Each intact rock sample was 7 m × 7 m × 14 m and assigned different mechanical properties. The first intact rock sample was assigned a uniaxial compressive strength of 205 MPa and an elastic modulus of 104 GPa with the UCS and elastic modulus values of

Course CEE9577

Intact Rock • Continuum of ppy yolycrystalline solid between continuities consisting of an aggregate of minerals or grains. Its properties are governed by ... E = Modulus of elasticity, G = Modulus of rigidity (or Shear modulus) ν= Poisson’s ratio , g = gravitational acceleration, γ= Unit weight of the material .

Elastic and Shear Moduli of Coal Measure Rocks Derived ...

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 stress–strain response of a rock sample subjected to uniaxial compression. However, this is a complicated and time consuming experiment. very

What is the elastic modulus of Sandstone

Intact sandtone can have a Young's modulus (E ... as such ranges of values are commonly quoted for the strength of rock and other geotechnical materials. ... Note that if E = elastic modulus and K ...

Prediction of Elastic Modulus of Intact Rocks Using ...

elastic modulus of jointed rock mass. They selected two artificial neural network models for prediction of 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

Estimation of Elastic Modulus of Intact Rocks by ...

modulus of elasticity of intact rock for practical purposes. The former approach outputs a real number and tries to fit It is concluded that the modulus of elasticity of intact into a regression-based output. The latter approach tries to rock can be estimated sufficiently well

Standard Test Method for Elastic Moduli of Intact Rock ...

1.1 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 ratio, n.

Evaluation of rock mass deformability using empirical ...

Evaluation of rock mass deformability is an important but very challenging task in the analysis and design of underground structures in rock. Although various empirical (correlation) methods have been developed for determining the deformation modulus of rock masses, they come in many forms and are scattered in different sources.

Estimating the deformation modulus of jointed rock mass ...

elastic modulus with lateral stress applied on intact rock [1]. Arora has presented an equation to calculate elastic modulus of jointed rock mass using elastic modulus of intact rock and lateral stress (σ 3) [2]. Having carried out a large number of tests, Kulhawy developed an equation to calculate rock

Published in: Journal of Mining and Environment · 2012Authors: M Ebadi · Saeed Karimi Nasab · Hossein JalalifarAffiliation: Shahid Bahonar University of KermanAbout: Rock mass classification

Standard Test Method for Compressive Strength and Elastic ...

Designation: D 7012 – 04 Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures1 This standard is issued under the fixed designation D 7012; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

HOW TO CLASSIFY ROCKS? (ENGINEERING CLASSIFICATION OF ...

Mar 06, 2015 · This method of rock classification was introduced by Deer & Miller in the year 1996. Two parameters are considered while classifying rocks on this method, which are Uniaxial compressive strength Modulus of elasticity Step by Step Method to Classify Rock Based on Engineering Parameters) This method of rock classification consists of 3 steps, as given []

NEGATIVE POISSON’S IN AUXETIC FOAMS COMMON

ELASTIC MODULI and PHYSICAL PROPERTIES of ROCKS Content YOUNG'S MODULUS (E) BULK MODULUS OR INCOMPRESSIBILITY (K) POISSON’S RATIO (V) SHEAR MODULUS (P) ELASTIC MODULI IN FLUIDS NEGATIVE POISSON’S IN AUXETIC FOAMS COMMON ELASTIC MODULI IN ROCKS Ackowledgements: Thanks to William Doll for detecting errors in this document

Rock Mechanics

Intact Rock • Strength classification is based on strength of the rock (compressive strength & modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock strength; A = very strong, E = very weak (Table 7.3) • Any discontinuities, fractures, bedding planes, etc. will

Elastic Modulus and Strength of Rock-Like Material with ...

When the content of the inclusion is 0, it is obvious that the elastic modulus of the rock is the elastic modulus of the intact rock. When the content reaches 1, it becomes a sample composed of the inclusion material, and its elastic modulus is consistent with the inclusion material. Therefore, the relationship between the elastic modulus of ...

Rock Testing Lab Services, Rock Engineering | GeoTesting ...

Uniaxial Compressive Strength, Young's Modulus, Poisson's ratio: Rock, Rock Strength, Rock Unconfined Compressive Strength, Rock Uniaxial Compressive Strength, Elastic Moduli: Details: Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures: ASTM D7012C

Composite elasticity of Copenhagen limestone

For the two scenarios, the Reuss (lower) bound of the elasticity modulus of the intact rock mass is estimated in the range 6,300 6,600 MPa. Assuming Poison s ratio of 0.3, G of the intact rock mass is estimated in the range of 2,400 2,600 MPa. It should be noted that these values relate to the same

ASTM D7012-14e1

ASTMD701214e1-Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures- ... 1.6 For an isotropic material in Test Methods B and D, the relation between the shear and bulk moduli and Young's modulus and Poisson's ratio are:

Estimating rock mass elastic modulus from seismic ...

Measurements of rock mass elastic modulus are scale-dependent (Heuze, 1980), complicating efforts to translate laboratory results from core sample testing to scales relevant for most rock engineering problems (Cai et al., 2004). Micro- and macroscopic discontinuities separating intact rock fragments are compliant variably

Laboratory Testing of IntactLaboratory Testing of Intact Rocks

mitigating common errors during lab testingmitigating common errors during lab testing of intact rock. Laboratory Testing of RocksLaboratory Testing of Rocks • Index testing of intact rock materials for ... Deformation Parameters of Intact RkRocks Elastic Modulus from Uniaxial and/or Triaxial Compression Fig. 8-6. Tensile Strength (TTensile ...

ASTM-D7012 | Standard Test Methods for Compressive ...

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. The elastic constants (Methods B and D) are used to calculate the stress and deformation in rock structures.

Standard Test Method for Elastic Moduli of Intact Rock ...

1.1 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 ratio, n.

Intelligent Models Applied to Elastic Modulus of Jointed ...

Intelligent Models Applied to Elastic Modulus of Jointed Rock Mass: 10.4018/978-1-5225-2709-1.ch001: Elastic Modulus (Ej) of jointed rock mass is a key parameter for deformation analysis of rock mass. This chapter adopts three intelligent models {Extreme

ASTM International

Uniaxial Compressive Strength of Intact Rock Core Specimens. 1.5.3.1 Method C is used for obtaining strength determinations. Strain is not typically measured; therefore a stress-strain curve is not produced. 1.5.4 Method D: Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression.

Elastic properties of fractured rock masses

Fracture embedded in an elastic intact rock Although very simple and commonly described in geomechanics textbooks, we develop the expression of the stress, strain, and fracture displacement of a disk-shaped fracture embedded in an elastic medium. ... (i.e. intact rock) with Young’s modulus ...

Bayesian prediction of elastic modulus of intact rocks ...

May 01, 2014 · Read "Bayesian prediction of elastic modulus of intact rocks using their uniaxial compressive strength, Engineering Geology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

ASTM D7012-04

ASTMD701204-Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures-1.1 T ASTM D7012-04 - Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures