young modulus of intact rock Solutions Just Right For You

1.3 Methods B and D specify 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, υ.These methods make no provision for pore pressure measurements and specimens are undrained (platens are not vented). Thus, the strength values determined are in terms of total stress and Calculation of Dynamic Modulus. Dynamic Young s modulus and Poisson s ratio can be calculated using longi-tudinal slowness, transverse slowness, and bulk density data. 0 50 100 150 200 250 300 0 20 40 60 80 Compressive strength (MPa) Young s modulus (GPa) Sandstone Mudstone y = 1.476x + 70.479 R = 0.672 y = 3.3991x + 63.69 R = 0.707

Rock Mechanics

Intact Rock Classification - Metamorphic rocks! • Tend to increase strength due to recrystallization and compaction! • Marbles may be weaker than limestones due to bigger grain size! E: very low strength – A: very high strength!! Rock strength and modulus properties determined on small intact hand samples - does not necessarily match field conditions ! Weakest link principle = overall

Intact Rock Classification - Metamorphic rocks! • Tend to increase strength due to recrystallization and compaction! • Marbles may be weaker than limestones due to bigger grain size! E: very low strength – A: very high strength!! Rock strength and modulus properties determined on small intact hand samples - does not necessarily match field conditions ! Weakest link principle = overall

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. NOTE 1—This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength. 1.2

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. NOTE 1—This test method does not include the procedures necessary to obtain a stress-strain curve beyond the ultimate strength. 1.2

Modulus of elasticity of rock mass: The ratio of stress to corresponding strain during loading of a rock mass, only for the elastic behavior. Since a rock mass contains weakness besides the intact rock material, the modulus values of the latter is in the order of

Deformability modulus of jointed rocks is a key parameter for stability analysis of underground structures by numerical modelling techniques. Intact rock strength, rock mass blockiness (shape and size of rock blocks), surface condition of discontinuities (shear strength of discontinuities) and confining stress level are the key parameters controlling deformability of jointed rocks.

ASTM D7012

Method D: Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression. Option A: Temperature Variation-Applies to any of the methods and allows for testing at temperatures above or below room temperature. 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. The engineering applicability of

Method D: Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression. Option A: Temperature Variation-Applies to any of the methods and allows for testing at temperatures above or below room temperature. 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. The engineering applicability of

The modulus of elasticity of rock material is one of the most important rock properties used in designing civil and mining projects such as dam and tunnel constructions or mine layout design. High-quality core samples are needed to obtain this parameter using laboratory tests. Sometimes it is very difficult to obtain highquality cores from particularly thinly bedded and heavy rock masses.

calibration, therefore, targeted a UCS of 92 MPa, a Young modulus of 55 GPa and a Poisson ratio of 0.3. A minimum particle radius of 0.05 m was used for the intact rock simulation in the BPM. This size is roughly one-fifth of the fracture spacing as suggested by Mas Ivars [4]. The detailed BPM calibration process for the Meliadine case study is presented in Kapinga Kalala [17]. 3.2.2

Modulus Of Elasticity Of Basalt Rock BINQ Mining. Dec 23 2012modulus of elasticity of basalt rock Quarrying Crusher Plant Quarrying Crushers are mainly used to make building stone materials and manufacturered sand CGM supplies plete crushing and screening plant for our clients all More detailed

Drilling boreholes into intact rock generally establishes a fail mechanism, and when boreholes are drilled in line, a plane of weakness is therefore established along the line of the boreholes. This can be used to some advantage. Dynamic tensile strength can be determined through some simple but effective testing using decoupled charges. Boreholes 75 mm in diameter and 10 m deep can be drilled

Intact Rock • Continuum of ppy yolycrystalline solid between continuities consisting of an aggregate of minerals or grains. Its properties are governed by the physical properties of the materials of which it is composed of and the manner in which they are bonded to each other Rock Mass • The in-situ medium which comprises intact rock blocks separated by discontinuities. Rock masses are

The most useful description of the mechanical behavior of intact rock is the complete stress – strain curve ofp the compressive strength test. From this curve can be determined the Young modulusFrom this curve can be determined the Young modulus and the post-peak behavior of the rock material. 6.

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. These parameters are obtained by the uniaxial compressive test. Although this test is simple, the preparation of the samples, especially of soft rocks, is a difficult and time consuming task. By using a

ASTM International

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 resistance), and cohesion intercept. The test method

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 resistance), and cohesion intercept. The test method

The empirical equation presented has a strong prediction capacity and can be used to estimate the modulus of elasticity of intact rock for practical purposes. It is concluded that the modulus of elasticity can be estimated significantly from the uniaxial compressive VOLUME 108 REFEREED PAPER OCTOBER 2008 625 [8a] Sept_47-52:Template Journal 11/10/08 11:26 AM Page 626 Estimating the modulus

Also the calculated analysis showed that Young's modulus of intact rock plays an important role in the aperture of the created fracture and with increase in Young's modulus, the aperture of fracture will decrease. The effects of the rock mass major discontinuity on the fracture treatment showed that major geological structures would act against fracture growth and decrease the efficiency of

A number of sigmoidal equations have been proposed that give rock mass modulus as a function of intact modulus and a rock mass rating. These equations may give a good estimate of modulus given the correct input data, however it is difficult to obtain reliable intact strength or intact modulus values from laboratory tests on samples from highly disturbed rock masses. Because of this limitation

Withdrawn Rationale: 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, . Formerly under the jurisdiction of Committee D18 on Soil and Rock

In 1 library. This thesis deals with the concept of a critical strain for intact rock and for rock masses. It uses these concepts to express a stress/strength based failure criterion for numerical modelling and applies this to engineering practice. Critical strain for intact rock: Since Sakurai introduced the concepts of critical strain for intact rock in 1982, few other researchers have

ABSTRACT Determination of mechanical properties of rocks is the most interesting problems in rock mechanics, which still is under study.Uniaxial compressive strength (UCS) and static elastic modulus (E s) of intact rock are among these properties which are widely used in mining and geotechnical engineering projects.In design stage of tunnels and foundations in rock, the results of laboratory

Modulus Of Elasticity Of Basalt Rock BINQ Mining. Dec 23 2012modulus of elasticity of basalt rock Quarrying Crusher Plant Quarrying Crushers are mainly used to make building stone materials and manufacturered sand CGM supplies plete crushing and screening plant for our clients all More detailed

ENGINEERING PROPERTIES OF ROCK CORE SAMPLES STATIC MODULUS OF ELASTICITY SPECIFIC GRAVITY ABSORPTION,% No. No. spec. avg 2.94 range 0.16 ~g 0.1 range 0.1 spec. stressrange psi 0-2000 0-4000 0-6000 0-8000 Secant E 106psi 13.5 13.8 13.2 12.9 ~ (~.18.20.21.21 (3) COMPRES~VESTRENGTH,PSI avg 40300 range 20200 (3) SHEARSTRENGTH, TRIAXIAL, PSI

The intact rock properties are 60 GPa for the Young's Modulus and 0.25 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 properties. Some values can be found in (Posiva, 2011) and (Mnkknen and Rantanen,

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