(f) If the normal strain is zero in the z direction, calculate the stress in the...

 

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(f) If the normal strain is zero in the z direction, calculate the stress in the z direction provided that; (3) ox = 16 MPa; y = 12 MPa; E = 70 GPa; G = 28 GPa; v = 0.25 Z 8. = 0 T X = ? Answer (g) Calculate the virgin vertical stress at point A if the overlying rocks consist of (3) the following thicknesses and densities; (take g = 10 m/s). 24 m Surface Answer Competent Sandstone: 13 m; 2700 kg/m Shale: 2 m; 2600 kg/m Laminated sandstone: 3 m; 2500 kg/m Carbonaceous Shale: 6 m; 2400 kg/m (h) List three factors that increase the shear strength of discontinuities. (3) (f) If the normal strain is zero in the z direction, calculate the stress in the z direction provided that; (3) ox = 16 MPa; y = 12 MPa; E = 70 GPa; G = 28 GPa; v = 0.25 Z 8. = 0 T X = ? Answer (g) Calculate the virgin vertical stress at point A if the overlying rocks consist of (3) the following thicknesses and densities; (take g = 10 m/s). 24 m Surface Answer Competent Sandstone: 13 m; 2700 kg/m Shale: 2 m; 2600 kg/m Laminated sandstone: 3 m; 2500 kg/m Carbonaceous Shale: 6 m; 2400 kg/m (h) List three factors that increase the shear strength of discontinuities. (3)

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Answer f Calculation of Stress in the z Direction Given 16 MPa 12 MPa E 70 GPa G 28 GPa v 025 To calculate the stress in the z direction z we can use ... View the full answer