List of top Geology Questions on Forces and Mechanism of Rock Deformation asked in GATE GG

The figure below shows an infinite-slope model. If \(\tau\) and SS denote the driving shear stress and the resisting shear strength, respectively, then \(\tau\) along the failure plane is \(\times 10^3\) kg/ms\(^2\) (round off to two decimal places).
[Use: \(d = 2\) m; \(\rho_{soil} = 2.0\) g/cm\(^3\); \(g = 9.8\) m/s\(^2\)]

The in situ stress at a point in a dry sandstone terrain is as follows: σ₁= 12 MPa and σ₃=4 MPa. The pore water pressure (p_w) increases by the construction of a reservoir. The failure criterion of the sandstone is given by \(σ'_1\)= 3.48 MPa +3σ'₃, where of and \(σ'_1\) are the effective maximum and minimum principal stresses, respectively. Assuming that the failure occurs at peak stress, the minimum value of P_w (in MPa) that will cause the sandstone to fail in situ is______  to two decimal places). 

Which one of the following represents deviatoric stress in a 2D stress Mohr Circle?

Which of the following structures is/are associated with duplexes in fold-thrust belts?

A sandstone follows Mohr-Coulomb failure criterion. If the uniaxial compressive strength and the angle of the internal friction of the sandstone are 7 MPa and \(30^\circ\), respectively, the calculated cohesion of the rock is ................ MPa. [round off to 2 decimal places]