List of top Mining Engineering Questions on Geomechanics

Match the following mechanical properties with the corresponding formula.

\[ \begin{array}{|c|l|c|l|} \hline \textbf{Property} & & \textbf{Formula} & \\ \hline P & \text{Modulus of Elasticity} & I & C+\sigma_n\tan\phi \\ Q & \text{Compressive Strength} & II & \dfrac{\text{Lateral Strain}}{\text{Longitudinal Strain}} \\ R & \text{Shear Strength} & III & \dfrac{\text{Stress}}{\text{Strain}} \\ S & \text{Poisson's Ratio} & IV & \dfrac{\text{Normal Force}}{\text{Area}} \\ \hline \end{array} \]

Match the following mechanical properties with the corresponding formula. \[ \begin{array}{|c|l|c|l|} \hline \textbf{Property} & & \textbf{Formula} & \\ \hline P & \text{Modulus of Elasticity} & I & C+\sigma_n\tan\phi \\ Q & \text{Compressive Strength} & II & \dfrac{\text{Lateral Strain}}{\text{Longitudinal Strain}} \\ R & \text{Shear Strength} & III & \dfrac{\text{Stress}}{\text{Strain}} \\ S & \text{Poisson's Ratio} & IV & \dfrac{\text{Normal Force}}{\text{Area}} \\ \hline \end{array} \]

Depending upon the decreasing ability of surrounding rock to store strain energy in underground metal mining methods can be ordered as
A borehole log of \(1.2\ \text{m}\) in length has recovered rock cores of lengths \(20,\ 8,\ 15,\ 8,\ 8,\ 4,\ 3,\ 9,\ 10,\ 1,\ 5,\) and \(10\ \text{cm}\). The RQD (in percentage) is
Barton classified the rock mass on the basis of
Creep occurs due to
Shear strength of a rock joint is not dependent on
In a slake durability test, the weight loss of a rock sample was \(7\%\). Then its durability index is
Increase in moisture content of rock
If Poisson's ratio of a rock sample is \(0.25\), then the relationship among the modulus of elasticity \((E)\), modulus of rigidity \((G)\), and bulk modulus \((K)\) is
The average Young's modulus and Poisson's ratio values of a limestone sample are \(60\ \text{MPa}\) and \(0.3\) respectively. The shear modulus in MPa is
A rock specimen was tested under compression. The lateral and longitudinal strains were found to be \(0.8\%\) and \(4\%\) respectively. The Poisson's ratio of the specimen is
In a Mohr--Coulomb failure criterion, the ratio of the uniaxial compressive strength to the tensile strength is
Depending upon the decreasing ability of surrounding rock to store strain energy in underground metal mining methods can be ordered as
A borehole log of \(1.2\ \text{m}\) in length has recovered rock cores of lengths \(20,\ 8,\ 15,\ 8,\ 8,\ 4,\ 3,\ 9,\ 10,\ 1,\ 5,\) and \(10\ \text{cm}\). The RQD (in percentage) is
Barton classified the rock mass on the basis of
Creep occurs due to
Shear strength of a rock joint is not dependent on
In a slake durability test, the weight loss of a rock sample was \(7\%\). Then its durability index is
Increase in moisture content of rock
If Poisson's ratio of a rock sample is \(0.25\), then the relationship among the modulus of elasticity \((E)\), modulus of rigidity \((G)\), and bulk modulus \((K)\) is
The average Young's modulus and Poisson's ratio values of a limestone sample are \(60\ \text{MPa}\) and \(0.3\) respectively. The shear modulus in MPa is
A rock specimen was tested under compression. The lateral and longitudinal strains were found to be \(0.8\%\) and \(4\%\) respectively. The Poisson's ratio of the specimen is
In a Mohr--Coulomb failure criterion, the ratio of the uniaxial compressive strength to the tensile strength is