Mining Engineering Gate 2023 Questions with Answer

Ques 27 GATE 2023

An underground coal mine experienced 5 serious injuries, 15 reportable injuries, and 25 minor injuries during 2020. If the average employment in the mine is 1200, then the total injury rate per 1000 persons employed is

Ques 28 GATE 2023

A tabular, near-flat (dip<30°), and less than 2 m thick copper orebody having erratically located grade is to be mined underground. Wall rock and orebody are competent. The most suitable mining method is

Ques 29 GATE 2023

As per DGMS guidelines, the risk score in Safety Management Plan for a hazard is computed as

Ques 30 GATE 2023

Match the following items with their respective contours Contour

Ques 31 GATE 2023

In an astronomical survey at a given station, the pole star is located at an angle of 27° from the horizon. The latitude of the survey station in degrees is

Ques 32 GATE 2023

The position tracking of a point by GPS is based on the technique of

Ques 33 GATE 2023

The average ore grade of a copper deposit is 0.9%. The recovery of the metal after processing, smelting and refining is 85%. If the selling price of refined copper is Rs 640/kg, the sale value in Rs. from mining one tonne of ore is [rounded off to 1 decimal place]

Ques 34 GATE 2023

A slope stability radar shows that the position of a point P in a mine dump shifts from (200, 700, -60) m to (200.05, 700.1, -60.75) m over a time Δt. The net displacement in cm of the point P is [rounded off to 2 decimal places]

Ques 35 GATE 2023

A Mohr-Coulomb failure envelop of a sandstone rock is given as
σ₁=30+3.5σ₃ where σ₁ and σ₃,
measured in MPa, are the major and minor principal stresses respectively. The angle of the failure plane with the σ₃ axis in degree is _________. [rounded off to 1 decimal place]

Ques 36 GATE 2023

A punch hole of diameter 10 mm is to be made in a 5 mm thick rock plate as shown. If the yield strength of rock plate is 25 MPa, the punch force P required in kN is _________. [rounded off to 1 decimal place]

Ques 37 GATE 2023

'Critical subsidence has occurred on the surface due to mining of a flat longwall panel at a depth of 200 m. The width of the panel is 150 m. The maximum width of the panel in m that can be mined at a depth of 300 m, to reach critical subsidence is ________[rounded off to 1 decimal place]

Ques 38 GATE 2023

To increase the resistance of a mine roadway by 1.5 Ns²m^-8, the size in m² of the regulator to be installed is _________.[rounded off to 2 decimal places]

Ques 39 GATE 2023

A coal seam of 3.0 m height is mined with a double-ended ranging drum shearer (DERDS) for a web depth of 0.5 m. The coal density is 1.4 tonne/m³. If the panel width is 150 m, the production per cycle in tonne is _________. [rounded off to 1 decimal place]