A block of rock has edge length (0.94m ,1.26m ,1.15 m ) the grain density is 2.87 g/cm3 find the porosity?
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- A 0.005-g sample of a rock is to be analyzed, and iron is to be determined at the ppm level. Determine the tye of analysis and type of constituent.Given a depth of burial of 10 kilometers, the density of 2.65 g/cm3, lithostatic stress to be 2.36 kilobar at normal temperature. dimension of granite is at its normal dimension. What is the dimension of the cubical granite at increased temperature having an increase in lithostatic stress to be 2.86 kilobars when temperature increases? The depth of burial is still the same.Problem 1.1. Determine the rock names for coarse-grained rock samples with the following proportions of alkali feldspar, plagioclase, and quartz. B Alkali feldspar Plagioclase Quartz 0.55 0,37 0.1 0.22 0.36 0.49 0.23 0.27 0.41
- Which rock elasticity parameter is sensitive to the presence of gas in the pores/cavities in the rock? Explain in detail.QUESTION 4aTo use rock in engineering applications, certain properties of the rock mass must be assessed to reasonably predict performance in the as-built condition. Discuss the following in the field of rock performance i. Discontinuityii. Elastic deformationiii. Plastic deformationProve the relationship between porosity and void ratio
- 50- 30 100 MPa 1. Which point is deeper in the crust, A or B? 2. What is the mean stress at pointA? 3. What is the differential stress at point B? 4. What is the value of o3 at point A? 5. Is o3 at point A tensile or compressive? Why? 6. What is the orientation, relative to the principal axes, of the fractures that form at point B? 7. Are these fractures at B shear or tensile fractures? Why? 8. If The pore fluid pressure a(A s increased until the rock hydraulically fractures, show on the figure at top right the orientation of these fractures with the sense of movement that they would undergo under the given stress. 9. Calculate the critical shear stress to induce onset of fractures at point B. 10. Calculate the normal stress at point A then compare it to the shear stress at point B. Page2A parameter m in the Hoek-Brown criterion indicates how the type of rock affects the criterion's strength. It is anticipated that the rock will be stronger with a greater value of m. Using the values of m provided in the question and comparing the peak compressive strengths of granite, rhyolite, and marble with each other, qu = 100MPa For marble (m = 7): peak compressive strength =? For rhyolite (m =17): peak compressive strength =? For granite (m = 25): peak compressive strength =?Select all true statements. In triaxial loading: U The confining pressure (o3) is progressively increased to break the sample subjected to uniform principal stresses (ol = o2). When initially loaded, the rock specimen compresses and then begins to dilate as a result of internal fracturing. When the water pressure increases, there is a transition from ductile to brittle behavior. When the confining pressure decreases, the behavior changes from strain- softening to strain-hardening.
- 1. Triaxial compression tests are done on quartzite rocks, the results are shown below. (0₁+03)/2 -964.25 14500 19575 23200 29000 43210 63075 psi (01-03)/2 964.25 14500 18850 21750 26100 35960 48575 psi Comment on the applicability of each of the Mohr-Coulomb, Griffith, and Hoek-Brown criteria for the testing results.For the rock element, shown: Calculate the following stresses of interest: Maximum Principal Stress Minimum Principal Stress Maximum Shear Stress Normal Stress at Failure Plane A-B Shear Stress at Failure Plane A-B still under geology. please include the solutions thank you. need it quickly.Find the value of void ratio Porosity=0.712