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Q1 Silo Wall Loads The axi-symmetric (conical) silo of Figure 1 is designed to handle GOLD ORE at 7.2% moisture content. You are asked to determine: (a) The initial vertical and normal wall pressures as a function of bin height during filling of the silo using the methodology presented in Australian Standard AS3774-1996. For the cylindrical section of the silo is k=0.37. For the hopper section, the pressure ratio is 38° given by khi tan a tan a + tan ow Cylinder: Mild Steel 10 m Dia 12 m (b) The vertical and normal wall pressures as a function of bin height for the flow case in accordance with AS3774, but using the modified khf value for the hopper pressures as given by: 2 (1 + sin 8 cos 2n) khf(mod) 2 - sin (1 + cos 2(a + n)) For the normal pressures on the cylinder walls during flow, the over-pressure factor (Cnf) based on the Janssen pressure should be used (Refer to notes) 25° The following information is given: Hopper Lining: Wall friction angles - Arcoplate Ow for Mild Steel = 34° w for Arcoplate = 23° 0.8 m Dia Effective angle of internal friction 8 = 52° Figure 1. Gold ore bin Bulk density, p = 1850 kg/m² The angle of repose of the GOLD ORE is 38°. The silo is initially centre filled. NOTE: The wall load results determined are to be plotted against the height of gold ore in the silo. All parameters used for calculating the wall loads are to be provided.