GATE Mineral Economics, Mine Planning, Systems Engineering: Mine Planning – Previous Year Questions
13 GATE previous year questions on Mine Planning (Mineral Economics, Mine Planning, Systems Engineering, Mining Engineering) with answers and explanations, from every paper.
- GATE 2021 MN Q63 – Ultimate-pit cumulative million tonnes below Cu grades 0.1%, 0.4%, 0.5%, 0.6%, 0.7%, 0.9%+ are 0, 15, 17, 18, 19, 23. Mill cutoff is 0.5% Cu. Mining…
- GATE 2022 MN Q15 – A deposit has grade X in [0, 30] with probability density f(x). At cutoff grade x c, what proportion is ore?
- GATE 2022 MN Q18 – Identify the WRONG statement. Break-even stripping ratio:
- GATE 2022 MN Q39 – Match semivariogram shapes P–S with models I pure nugget, II exponential, III spherical, IV Gaussian, and properties E reaches sill at finite range, F…
- GATE 2022 MN Q63 – A 12 m thick coal seam dips 30°, has density 1.41 tonne/m³ and is mined with a 45° pit slope. The limiting instantaneous stripping ratio is 10…
- GATE 2023 MN Q28 – Copper ore grade is 0.9%, overall processing/smelting/refining recovery is 85%, and refined metal sells at ₹640/kg. Find sales revenue from one tonne…
- GATE 2024 MN Q18 – A spherical semivariogram is given by γ(0)=C₀; for 0<h≤a, (h)=C 0+(C-C 0)[1.5h/a-0.5(h/a)3]; and γ(h)=C for h>a. Name C₀, C, a respectively.
- GATE 2024 MN Q25 – Ore grades 58% and 62% Fe have net values₹4000 and₹4500/tonne. Net value varies linearly with grade. Waste mining costs₹1000/m³. Find the economic…
- GATE 2024 MN Q58 – Each Cu-grade interval(0.3, 0.4], (0.4, 0.5], (0.5, 0.6], (0.6, 0.7], (0.7, 0.8]% contains 5 million tonnes; other grades have zero tonnage.…
- GATE 2025 MN Q35 – Copper sells for₹900/kg. Mining costs₹500/tonne ore and processing₹2000/tonne ore. Overall metal recovery is70%. Ignoring other costs, find break-even…
- GATE 2025 MN Q45 – A ringhole round targets2500 tonnes at8% metal but breaks only90%. Overbreak adds250 tonnes of wallrock at0.5% metal. If95% of the resulting muck is…
- GATE 2025 MN Q59 – A vertical core log begins at590 mRL. Sequential(length m,grade%) values are(3,40),(3,42),(2,41),(3,43),(2,42),(3,41),(3,44). Composite the interval5…
- GATE 2026 MN Q46 – The exploratory boreholes and their influence polygons are shown. With equal density assumed, estimate average deposit grade in percent to two…