The bulk modulus of the rock matrix grains K m depends on lithology Value is the Voigt Reuss Hill average calculated assuming hexagonal symmetry Watt and Peselni 1980 using the elastic stiffness calculated in Ebrahimi et al 2012 h Density and estimates of moduli in Bailey and Holloway 2000 i
·Only λ and shear modulus μ appear in Hooke s law and not Young s modulus E the bulk modulus K or Poisson s ratio υ Unfortunately so far little has been known about the characteristic λ value for each common type of crystalline rocks that constitute the Earth s crust and upper mantle and its variation with pressure P
·Type of rock; Porosity; Grain size; Water content; Value of modulus of elasticity can be determined by static or dynamic methods Higher value of modulus of elasticity indicates good quality rock having sound composition Typical values of modulus of elasticity of some common are given in the table below Modulus of Elasticity of Some Common Rocks
·where e is an empirical constant with a typical value equal to 3 Brie s empirical correlation recovers the Voigt upper bound when e = 1 but it is not consistent with Reuss lower bound for sufficiently large values of e and K et al suggested a practical solution to assume that the effective fluid modulus falls roughly between Reuss bound and Brie average
·The modulus ratio M R = E/σ c between the modulus of elasticity E and uniaxial compressive strength σ c for intact rock samples varies from 106 to 1600 Palmström and Singh 2001 For most rocks M R is between 250 and 500 with average M R = 400 E = 400 σ Palchik examined the M R values for 11 heterogeneous carbonate rocks from different
·• 6 stiffness classes Table based on modulus of elasticity E t50; very stiff to highly yielding Engineering Classification of Rock and Rock Masses 33 Determining the modulus of elasticity E t50 Plotting E t50 value of a rock vs the unconfined compressive strength gives a visual comparison of the
·The paper develops theoretical estimates for the parameters that describe the classical theory of poroelasticity for a fluid saturated porous medium with a porous elastic skeleton that can
·Among elastic rock properties one may mention Youngâ s modulus shear modulus bulk modulus and Poissonâ s ratio As the shear modulus and bulk modulus are functions of Youngâ s modulus and Poisson ratio the last two parameters are the most Corresponding author Tel 48 604 055 842; fax 48 12 617 20 59
·relatable to the reference bulk modulus of the framework of mineral grains K ref whose porosity is φ the bulk modulus of the minerals comprising the sediment K min and the bulk modulus average of the pore fluids K fl as follows minmin wet ref fl wet ref fl K KK KK KK φKK = −− −;
·In the absence of information we estimate upscaled values of Young s modulus Poisson s ratio shear modulus and bulk modulus for volcanic rock with an average porosity and an average fracture density/quality to be GPa GPa and GPa respectively
Broyage de calcaire en belgique
Dans des industries modernes, le poudre a une large application et l'industrie de fabrication de poudre…
La ligne de production de caillou et de basalte au Panama
Panama est l'un des marchés les plus importants de la Fabricant De Concasseur De Pierre SHBM en Amérique…
L’installation de concassage de granit au Sri Lanka
Le Sri Lanka est l'un des plus important marché d'Asie pour Fabricant De Concasseur De Pierre SHBM,…