young modulus of intact rock in laos

Temperature also affects the deformability of intact rock Fig 67 shows the normalized elastic modulus EE 0 values at various temperatures for several granites and one mudstone where E 0 is the elastic modulus at the lowest test temperature which is 30°C for the British granite Salisbury granite Remiremont granite Senones granite and Indian granite 20°C for the Ningbo granite and

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

Jun 21 2018 · The reservoir rock for many geothermal projects in the Upper Rhine Graben such as those at SoultzsousForêts and Rittershoffen both France is porphyritic granite High fracture densities up to 30 fracturesm in this reservoir rock require that we consider the strength and elastic modulus of the rock mass rather than the intact rock

Jan 01 2017 · Abstract Young modulus is one of a basic geomechanical parameters used for the defining of the phenomena in rock mass It is determined based on a uniaxial compressive test According to the International Society of Rock Mechanics one may calculate it in three different ways as the tangent secant and average modulus

Withdrawn Rationale This test method covers the determination of elastic moduli of intact rock core specimens in uniaxial compression It specifies the apparatus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 stressaxial strain and the stresslateral strain curves as well as Youngs modulus E and Poissons ratio Formerly under the jurisdiction of Committee D18 on Soil and Rock

Rock Rock Mechanical properties When a stress σ force per unit area is applied to a material such as rock the material experiences a change in dimension volume or shape This change or deformation is called strain ε Stresses can be axialeg directional tension or simple compressionor shear tangential or allsided eg hydrostatic compression

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

Intact Rock • Strength classification is based on strength of the rock compressive strength modulus of elasticity Table 72 • 5 strength classes AE based on the overall rock strength A very strong E very weak Table 73 • Any discontinuities fractures bedding planes etc will strongly influence overall strength of the

for these intact rock pieces and value of the Geological Strength Index GSI for the rock mass Intact rock properties For the intact rock pieces that make up the rock mass equation 1 simplifies to 05 3 1 3 1 ci ci m i 5 The relationship between the principal stresses at failure for a given rock is defined by

Feb 13 2015 · Youngs Modulus of Elasticity E kgcm 2 10 5 Igneous Rocks Basalt 20 – 100 Diabase 30 – 90 Gabbro 60 – 110 Granite 26 – 70 Syemite 60 – 80 Sedimentary Rocks Dolomite 20 – 44 Limestone 10 – 80 Sandstone 05 – 86 Shale 08 – 30 Metamorphic Rocks Gneiss 20 – 60 Marble 60 – 90 Quartzite 26 – 102 Schist 41 – 72