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Elastic Modulus Of Intact Rock

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Bayesian prediction of elastic modulus of intact rocks

Bayesian Prediction Of Elastic Modulus Of Intact Rocks

Abstract The uniaxial compressive strength UCS and the Youngs modulus E are two important aspects of intact rock behavior. Although they can be measured in the laboratory, testing requirements increase the difficulty and cost of such tests. For that reason, faster and less costly methods have been proposed to indirectly estimate UCS, and many models have been proposed to estimate E of ...

Estimation of Elastic Modulus of Intact Rocks by

Estimation Of Elastic Modulus Of Intact Rocks By

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-quality cores are required.

PDF Prediction of Elastic Modulus of Intact Rocks Using

Pdf Prediction Of Elastic Modulus Of Intact Rocks Using

The purpose of this study is developing of a model for estimation of elastic modulus of intact rocks. Mechanical rock excavation projects require static modulus of elasticity E of the intact rock material. High-quality core specimens of proper geometry are nedded for the direct determination of this parameter. However, it is not always possible to obtain suitable specimens from highly ...

PDF Estimation of Elastic Modulus of Intact Rocks by

Pdf 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

PDF Empirical Estimation of Intact Rock Elastic Modulus

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.

PDF Prediction of Elastic Modulus of Intact Rocks Using

Pdf Prediction Of Elastic Modulus Of Intact Rocks Using

Mechanical rock excavation projects require static modulus of elasticity E of the intact rock material. High-quality core specimens of proper geometry are nedded for the direct determination of this parameter. However, it is not always possible to obtain suitable specimens from highly fractured andor weathered rocks for this purpose.

Estimating the modulus of elasticity of T the rock

Estimating The Modulus Of Elasticity Of T The Rock

Estimating the modulus of elasticity of the rock material from compressive strength and unit weight by I. Ocak Synopsis The modulus of elasticity of rock material Ei is an important rock property that is used as an input parameter in the design stage of engineering projects such as dam and tunnel constructions, mining excavations, and so forth.

Estimation of rock modulus For intact rocks with an

Estimation Of Rock Modulus For Intact Rocks With An

Feb 01, 2006 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.

PDF MODULUS OF ELASTICITY DETERMINATION OF ROCKS USING

Pdf 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 Youngs modulus in the laboratory using three different means.

Modelling of the Elasticity Modulus for Rock Using Genetic

Modelling Of The Elasticity Modulus For Rock Using Genetic

Sep 01, 2016 Abstract. In rock engineering projects, statically determined parameters are more reflective of actual load conditions than dynamic parameters. This study reports a new and efficient approach to the formulation of the static modulus of elasticity applying gene expression programming GEP with nondestructive testing NDT methods. The results obtained using GEP are compared with

Elastic Modulus of Rock when Deflection Due to Moments

Elastic Modulus Of Rock When Deflection Due To Moments

What is Elastic Modulus of Rock The elastic modulus describes the linear elastic deformation response of rock under deformation. The static elastic modulus of an intact rock, Ei, is typically calculated as the slope of the stressstrain curve of a rock deforming under uniaxial compression Ulusay and Hudson 2007.

Standard Test Method for Elastic Moduli of Intact Rock

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 Youngs modulus, E , and Poissons ratio, .

Indirect measurement of the elastic modulus of intact

Indirect Measurement Of The Elastic Modulus Of Intact

Dec 01, 2018 Elastic modulus of intact rocks E plays a fundamental role in both the primarily and ultimately design stages of rock engineering structures i.e., tunnel design, rock drilling and blasting design, rock slope stability analysis, rock pillar design, road projects, bridges and dams design. In addition, elastic modulus is the key parameter in analyzing of the rock cores stress-strain chart in

WHAT ARE THE VALUES OF MODULUS OF ELASTICITY amp

What Are The Values Of Modulus Of Elasticity Amp

Feb 13, 2015 Poissons Ratio of Rock. Poissons ratio measures the ratio of lateral strain to axial strain at linearly elastic region. For most rocks, the value of Poissons ratio ranges in between 0.15 to 0.40. Typical values of modulus of elasticity of some common are given in the table below.

INFLUENCE OF INTACT ROCK STRENGTH ON ROCK

Influence Of Intact Rock Strength On Rock

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

Empirical Estimation of Rock Mass Modulus

Empirical Estimation Of Rock Mass Modulus

deformation modulus of the intact rock E i and the rock mass damage factor D. The paper includes guidelines on the selection of the damage factor D and for estimating the intact rock modulus E i from the intact rock strength for cases where no reliable modulus measurements are available.

Elastic properties of fractured rock masses

Elastic Properties Of Fractured Rock Masses

embedded in an infinite elastic rock matrix i.e. intact rock with Youngs modulus and Poissons ratio for example Sneddon and Lowengrub, 1969 Kachanov and Sevostianov, 2013 the subscript m and f refers to matrix and fracture properties, respectively 1 4 1 2 1 2 2

THE DEFORMATION MODULUS OF ROCK MASSES

The Deformation Modulus Of Rock Masses

Modulus of elasticity of a rock mass Eem The ratio of stress p ... 1992 found that the deformation modulus on intact rock samples is in the order of 5 to 20 times higher than in situ values. The variation in blockiness or degree of . 3 jointing in rock masses may often cause a major part of this large variation. Part of it may also ...

Estimating the deformation modulus of jointed rock

Estimating The Deformation Modulus Of Jointed Rock

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 3 2. Having carried out a large number of tests, Kulhawy developed an equation to calculate rock

Elastic and Shear Moduli of Coal Measure Rocks Derived

Elastic And Shear Moduli Of Coal Measure Rocks Derived

on Haldanes distribution function to predict the elastic modulus of intact carbonates. He concluded that this model is better correlated with the experimental data for Israeli carbonate rocks having a UCS o100MPa. Deriving the elastic properties of a rock from its mineralogical content has been a tempting alternative approach 3.Theidea

Elastic modulus on rocks Matest

Elastic Modulus On Rocks Matest

Elastic modulus of rock specimens in uniaxial and triaxial tests Automatic System with pace rate control also when releasing the load.. It can be used with a Matest high stability frame with capacity of 2000, or 3000 kN coupled to the Automatic Servo-controlled system Servo-Plus Evolution mod.

Estimating in situ rock mass strength and elastic modulus

Estimating In Situ Rock Mass Strength And Elastic Modulus

Jun 21, 2018 Intact rock elastic modulus. The elastic modulus describes the linear elastic deformation response of rock under deformation. The static elastic modulus of an intact rock, E i, is typically calculated as the slope of the stressstrain curve of a rock deforming under uniaxial compression Ulusay and Hudson 2007. We calculated the static elastic modulus for our samples from the UCS and the

PDF ELASTIC PROPERTIES OF ROCKS ResearchGate

Pdf Elastic Properties Of Rocks Researchgate

According to, the elastic modulus of granite varies from 2.59 GPa to 88.79 GPa, and in the case of sandstone from 3.4 GPa to 71.7 GPa. In another paper, 48.8 GPa is the identified value of the...

Rock Properties University of Western Ontario

Rock Properties University Of Western Ontario

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 Poissons ratio , g gravitational acceleration, Unit weight of the material .