List of top Mining Engineering Questions asked in TS PGECET

In a cut-and-fill stope, the main purpose of backfilling is to
The factor of safety of a coal pillar decreases with
Economic depth of surface mining primarily depends on
For highwall mining, web pillar design is governed mainly by
The equipment used for both drop cut and terrace cut in surface mining is
Post-pillar method of stoping is a variant of
What is the formula for Factor of Safety?
A cylindrical sample of cross-sectional area \(A\), length \(L\), and Young's modulus \(E\) is subjected to a constant uniaxial load \(P\). Within the elastic limit, the expression for the total strain energy \((U)\) stored in the sample is
A multi-point borehole extensometer is used to monitor
Which one of the following ropes cannot be an effective cable bolt?
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
When the two principal stresses are equal and are alike, the resultant stress on any plane is
The size distribution of soil is known as
Massive sandstone in immediate roof delays the local fall in goaf of a coal mine. Under this condition crushing of the pillars at outbye side is called
Maximum shear stress in a Mohr's Circle is
The ratio of the specific weight of an intact rock to that of loose rock is
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
The angle of draw in a trough subsidence helps in
Identify the active support, out of support categories given for an underground coal mine
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