ONKALO POSE ExperimentThe intact rock properties are 60 GPa for the Young’s Modulus and 025 for the Poisson Ratio (Posiva, 2011) The ongoing DFN models of the site are given in (Fox et al, 2012) There are currently only few data to support the definition of fracture mechanical.THE DEFORMATION MODULUS OF ROCK MASSESModulus of elasticity or Young's modulus ( E ) The ratio of stress to corresponding strain below the proportionality limit , found that the deformation modulus on intact rock samples is in the order of 5 to 20 times higher than in situ valu The variation in 3.ASTM D3148Rock Test Property Young's Modulus, Poisson's ratio Description of Test A rock core sample is cut to length, and the ends are machined flat The specimen is placed in a loading frame and, if required, heated to the desired test temperature Axial load is.ISP5 International Symposium 05 Evaluation of the deformatbasic intact rock properties such as the uniaxial compressive strength and Young’s modulus As result of several civil works constructed in the last ten years and also using data from bibliography, the data used in this study includes more than 700 results.13 Earth MaterialsShear modulus and bulk modulus Shear or rigidity modulus σS =GεS =µεs Bulk modulus (1/compressibility) −P =Kεv Can write the bulk modulus in terms of the Lamé parameters λ, µ K = λ+ 2µ/3 and write Hooke’s law as σ= (λ+2µ) ε Young’s or stiffness σn =.An Introduction to Engineering Properties of Soil and Rock43 PERMEABILITY OF ROCK Intact rock is generally impermeable, but completely intact rock masses rarely occur The permeability of rock masses is controlled by discontinuities (fissures, joints, cracks, etc), and flow may be either laminar (Darcy’s.DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES 1the dynamic Young's modulus, Ed, Poisson's ratio

13/12/2016· The intact rock is very different to the rock mass consisting of discontinuities, which include one or more of joints, faults, fissures, or bedding planes which occur in parallel.

E Young's Modulus of Intact Rock and its unitI 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 Strain is not in units of length, mm, as it is the change in length (mm) divided by the original length (mm), hence.Rock MechanicsIntact Rock • Strength classification is based on strength of the rock (compressive strength & modulus of elasticity; Table 72) • 5 strength classes A E based on the overall rock strength; A = very strong, E = very weak (Table 73) • Any discontinuities.Rock MechanicsIntact Rock • Strength classification is based on strength of the rock (compressive strength & modulus of elasticity; Table 72) • 5 strength classes A E based on the overall rock strength; A = very strong, E = very weak (Table 73) • Any discontinuities.Prediction of Young's Modulus of Intact Rock UsingMany models have been proposed to estimate the Young's modulus, E, of intact rock based on its uniaxial compressive strength, UCS 's model, ie, E = MR ⋅ UCS (where.13 Earth MaterialsShear modulus and bulk modulus Shear or rigidity modulus σS =GεS =µεs Bulk modulus (1/compressibility) −P =Kεv Can write the bulk modulus in terms of the Lamé parameters λ, µ K = λ+ 2µ/3 and write Hooke’s law as σ= (λ+2µ) ε Young’s or stiffness σn =.Triaxial compression test on intact rockThe purpose of the testing was to determine the compressive strength and the elastic properties, represented by Young’s modulus and the Poisson ratio, of confined cylindrical intact rock cores at different confining pressur Moreover, the specimens had a.Triaxial compression test on intact rockThe purpose of the testing was to determine the compressive strength and the elastic properties, represented by Young’s modulus and the Poisson ratio, of confined cylindrical intact rock cores at different confining pressur Moreover, the specimens had a.

#### Empirical Estimation of Rock Mass Modulus

intact rock modulus E i from the intact rock strength for cases where no reliable modulus measurements are available Figure 1 Simplified Hoek Diederichs equation for empirical estimates of rock mass deformation modulus based on the Geological Figure 2.

Modulus of DeformationThe method for estimated deformation modulus (E rm in MPa) developed by Hoek and Diederichs is based on Young’s modulus of the intact rock material (E i), the Geological Strength Index (GSI) rock mass classification scheme (Hoek et al 2013), and the rock mass disturbance factor (D) applied to the uppermost 05 3 m of the rock mass depending on excavation methods and care.Prediction of Young's Modulus of Intact Rock UsingMany models have been proposed to estimate the Young's modulus, E, of intact rock based on its uniaxial compressive strength, UCS 's model, ie, E = M R ⋅ UCS (where M R is the modulus ratio), is the most accepted one However, traditional models.DraftA global intact rock database of nine parameters, including uniaxial compressive strength and Young’s modulus, is compiled from 184 studi This database, labeled as “ROCK/9/4069”, consists.Generic transformation models for some intact rockA global intact rock database of nine parameters, including uniaxial compressive strength and Young’s modulus, is compiled from 184 studi This database, labeled as “ROCK/9/4069”, consists of 275% igneous rock, 594% sedimentary rock, and 131%.Prediction of Elastic Modulus of Intact Rocks Using ArtificialHowever, the ranges of the modulus ratios of intact rock (MR = uniaxial compressive strength/elastic modulus) are wide and generally overlap for most of the rock types (Fig1).modulus of elasticity of rocks(PDF) MODULUS OF ELASTICITY DETERMINATION OF The oratory 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 in the.Generic transformation models for some intact rockA global intact rock database of nine parameters, including uniaxial compressive strength and Young’s modulus, is compiled from 184 studi This database, labeled as “ROCK/9/4069”, consists of 275% igneous rock, 594% sedimentary rock, and 131%.DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES 1 INTRODUCTION 2 DEFORMABILITY OF INTACT ROCKthe dynamic Young's modulus, Ed, Poisson's ratio