young modulus of intact rock
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Measurement of Stiffness in Rock from Laboratory and Field ...
in a rock mass, the modulus of deformation of rock may be quite different from its modulus of elasticity. Recall that the modulus of deformation is based on the total measured deformation (elastic plus inelastic). There are static and dynamic methods for determining the deformability of in-situ rock.
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Compressive strength of rocks - petrowiki.org
The pressure under which a rock deforms is known as its compaction strength. In Fig. 3, at some elevated stress or confining pressure, the rock will begin to show ductile deformation. The grain structure begins to collapse, and the rock will compact and lose porosity.
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CHARACTERIZATION OF GEOLOGIC MATERIALS
characterize the engineering behavior of rock masses. 1. Types of Geologic Materials Geologic materials include both soils and rocks but a well-defined boundary between them does not exist. For example, a highly weathered rock shown as a rock on a geologic map may be considered soil by a civil engineer. For the purpose of this article, a soil ...
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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, .
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Triaxial compression test on intact rock | Young's Modulus ...
The results from the tests are going to be used in the site descriptive rock mechanics model. represented by Young’s modulus and the Poisson ratio. of confined cylindrical intact rock cores at different confining pressures.
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Estimation of rock modulus: For intact rocks with an ...
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 …
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Rock Subgrade Modulus - Foundation engineering - Eng-Tips
Sep 11, 2008· The value that I need is the horizontal subgrade modulus for the rock in order to determine what deflection the foundation will see when bearing against the rock. Bowles has some empirical formulas for estimating Ks from the Es. I calculated the Es of the rock mass from the RMR.
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Course CEE9577 - Faculty of Engineering
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 .
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THE DEFORMATION MODULUS OF ROCK MASSES - …
THE DEFORMATION MODULUS OF ROCK MASSES - comparisons between in situ tests and indirect estimates Arild Palmström, Ph.D., Norway 1 Rajbal Singh, Ph.D., India 2 SUMMARY Three methods of in situ deformation modulus (Em) measurements of rock masses have been described, analysed and …
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Foundations - Modulus of Elasticity
The large ranges emphasize the need for testing at each site.
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Standard Test Methods for Compressive Strength and Elastic ...
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.
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ASTM D3148 | Testing Services | Standard Test Method for ...
Standard Test Method for Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression **ASTM has discontinued this method, the industry-accepted standard test method is now ASTM D7012D Reference Number ASTM D3148 Material. Rock. Test Property. Young's Modulus, Poisson's ratio. Description of Test
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Mechanical Properties of Intact Rock and Fractures in ...
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 ...
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Prediction of Young's Modulus of Intact Rock Using ...
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 ...
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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.
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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 ... and unit weight as input to predict elastic modulus of intact rock. …
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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 ...
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Chapter 2: Principles of Drilling and Excavation
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 ).
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Predicting the Uniaxial Compressive Strength and Static ...
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.
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Rock Testing Lab Services, Rock Engineering | GeoTesting ...
Rock Testing Service Sheet Tunnels. GeoTesting Express performs a full-range of tests on rock. We prepare and tests rock specimens in-house. Servicing the geotechnical, tunneling, mining and excavation industries, we provide rapid strength and index testing of rock samples.
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International Society for Rock Mechanics CONTENT - ISRM
Rock Exposures Borehole Cores Borehole Wall Images Intact rock Block samples for testing Cores for testing Discontinuity masurements for Rock Mass Characterization Measurement of disconttinuity properties is limited and no possibility of measuring rock mass properties Flat-jack stress determination, larger-scale modulus and permeability tests
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ASTM-D7012 | Standard Test Methods for Compressive ...
1.1 This test method covers the determination of the strength of intact rock core specimens in uniaxial compression and confined compression. The tests provide data in determining the strength of rock, namely: the uniaxial strength, shear strengths at varying pressures and varying temperatures, angle of internal friction, (angle of shearing ...
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Determination of Rock Strength and Deformability of Intact ...
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, …
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Estimating the deformation modulus of jointed rock mass ...
3. Prediction of rock mass modulus containing a joint set The summation of a rock block displacement containing one joint set is the summation of intact rock displacement and joint set displacement. Equation (14) can be used to calculate elastic displacement [7]. (14) Where E is Young’s modulus of intact rock and L
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Rock Properties | Young's Modulus | Strength Of Materials
by the rock than by the blast design. Intact Rock Properties 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) Density (ρ) P-Wave Velocity (Vp) Definitions
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E Young's Modulus of Intact Rock and its unit ...
RE: E Young's Modulus of Intact Rock and its unit. BigH (Geotechnical) 19 May 15 11:54 Strain is not in units of length, mm, as it is the change in length (mm) divided by …
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Data Qualification and Data Summary Report: Intact Rock ...
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 ...
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Rock mechanical properties - petrowiki.org
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.)
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REVIEW OF MECHANICAL PROPERTIES OF OIL SHALES ...
on mechanical properties of oil shales are accompanied by an indication of organic matter content. Commonly, the parameter reported is the oil yield given in gallons per ton (GPT, 1G = 4.2 L) determined by the standardized Fischer assay technique (heating 100 g of crushed rock to 500 °C).
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Estimating rock mass elastic modulus from seismic ...
ISRM, 1975) well below the Young’s modulus obtained from corresponding intact rock specimens (Ei) (Farmer and Kemeny, 1992; Wyllie, 2003). Accurate prediction of rock mass deformation is crucial in a wide variety of rock engineering applications (e.g. tunnel support, foundations), highlighting the relevance of modulus
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