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Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.
K D = around 3 for natural quarry rock; K D = around 10 for artificial interlocking concrete blocks; S r = (ρ r / ρ w is the relative density of rock, i.e. (ρ r / ρ w - 1) = around 1.58 for granite in sea water; ρ r and ρ w are the densities of rock and (sea)water (-) θ is the angle of revetment with the horizontal
where R is the rainfall erosivity factor, K is the soil erodibility, [3] [4] L and S are topographic factors representing length and slope, and C and P are cropping management factors. Other factors such as the stone content (referred as stoniness ), which acts as protection against soil erosion, are very significant in Mediterranean countries.
Megaliths from 10 to a 50-ton pillar still in its quarry [64] transported up to a 1/4 mile. [65] Stonehenge, England. Largest stones over 40 tons were moved 18 miles (29 km); smaller bluestones up to 5 tons were moved 130 miles (210 km). [49] Trajan's column Rome, Italy. Forty-ton drums. The capital block of Trajan's Column weighs 53.3 tons. [66]
The Van der Meer formula is a formula for calculating the required stone weight for armourstone under the influence of (wind) waves.This is necessary for the design of breakwaters and shoreline protection.
Armourstone along the sea wall south of Dawlish Warren (UK) Armourstone is a generic term for broken stone with stone masses between 100 and 10,000 kilograms (220 and 22,050 lb) (very coarse aggregate) that is suitable for use in hydraulic engineering.
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The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.
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