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VOL = 612 lbs / (165 lbs/ft3 x 0.7) = 5.3 ft3 . To check rock in place, the cumulative weight of the rocks larger than 9 inches must not exceed 40 percent of the total weight; the cumulative weight of the rocks larger than 6 inches must not exceed 75 percent of the total weight; etc. Comments on Example 2: D50 = 6 inches; Dmax = 12 inches. Use ...
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Put it on its edge on a flat, hard surface. If a rock attracts a magnetic, you can cause the magnet to roll by pulling the magnet with the rock. Magnetite (Fe3O4) is a common Earth mineral. It readily attracts a cheap ceramic magnet. Because this rock is reddish, it probably also contains hematite (Fe2O3). Pure hematite does not attract a magnet.
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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: 0.5 ' ' 3 1 3 1 ci ci m i (5) The relationship between the principal stresses at failure for a given rock is defined by
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one value of median grain size. The article did not say how sorting was defined here. Fig 3.7 Porosity and permeability estimated from grain size distribution [Selley 1985 (Beard and Weyl 1973) and (Naggtegaal 1978)] Sorting So extremely well sorted 1.0-1.1 very well sorted 1.1-1.2 well sorted 1.2-1.4 moderately sorted 1.4-2.0 poorly sorted 2.0-2.7
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12.13 Calculate the density of FeO, given that it has the rock salt crystal structure. Solution We are asked to calculate the theoretical density of FeO. This density may be computed using Equation (12.1) as ! = n " (AFe+ AO) VCNA Since the crystal structure is rock salt, n' = 4 formula units per unit cell. Using the ionic radii for Fe2+ and O2-from Table 12.3, the unit cell volume is computed ...
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