Mining Engineering Gate 2021 Questions with Answer

Ques 53 GATE 2021

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The grade-tonnage distribution for the ultimate pit of a mine is given below.

The mill cut-off grade is 0.5% Cu. The annual mining capacity (ore + waste) is 4.5 million tonne and milling capacity is 1.0 million tonne. Excavation is planned in such a way that either of the mine or the mill runs at full capacity throughout. The planned life of the mine, in years, is [round off to one decimal place]

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Ques 54 GATE 2021

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A coal mine operating in three shifts produces 400 tonnes of coal per day with a face OMS of 1.0 from panel A, and 200 tonnes of coal with face OMS of 1.0 from panel B. The panel A and panel B are in parallel with resistance 0.6 Ns^-2m^-8 and 0.5 Ns^-2m^-8, respectively. If the panels are supplied with minimum permissible quantity as per CMR 2018, the requisite regulator resistance to meet the conditions in Ns^-2m^-8 is ________. [round off to 2 decimal places]

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Ques 55 GATE 2021

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A set of three steel bars of equal cross-sectional area of 0.01 m² are loaded, as shown in the figure. The elastic modulus of steel is 200 GPa. The overall change of length of the complete set of bars, in mm, is ________. [round off to 3 decimal places]

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