GATE Mining Geology, Mine Development and Surveying: Mine Development – Previous Year Questions
17 GATE previous year questions on Mine Development (Mining Geology, Mine Development and Surveying, Mining Engineering) with answers and explanations, from every paper.
- GATE 2022 MN Q16 – Which drilling technique is most appropriate for mineral exploration?
- GATE 2022 MN Q19 – The figure shows a square pattern of holes fired simultaneously. Identify the labelled zone with no fragmentation.
- GATE 2022 MN Q36 – Match drilling patterns P–S shown with operations I drifting, II shaft sinking, III sublevel stoping and IV drop raising.
- GATE 2022 MN Q45 – A blast round breaks 320000 m³ using 100 holes of diameter D=200 mm. Subgrade is 8D, stemming 25D and bench height 30 m. Powder factor is 3.2 m³/kg.…
- GATE 2022 MN Q47 – Balanced ANFO reaction is 3NH 4NO 3+CH 27H 2O+CO 2+3N 2. Find ammonium nitrate needed for 100 litres of fuel oil of density 850 kg/m³, in kg to two…
- GATE 2023 MN Q12 – Identify the coal-face blast cut shown in the front, side and top views.
- GATE 2023 MN Q60 – A surface blast has spacing 4 m, burden 3 m, hole diameter 110 mm and drilled length 8.8 m including 10% subgrade. Explosive density is 900 kg/m³ and…
- GATE 2024 MN Q27 – An explosive has density 1.2 g/cm³ and heat 900 cal/g. ANFO has density 0.8 g/cm³ and heat 950 cal/g. Find relative bulk strength to two decimals.
- GATE 2024 MN Q34 – A VCR stope uses 165 mm diameter holes. Under the spherical-charge approximation of length at most six diameters, find maximum charge length in m to…
- GATE 2024 MN Q35 – A 3×2.8 m development heading uses 2.4 m holes, pull factor 0.95 and swell factor 1.20. Find loose blasted-rock volume per round in m³ to two…
- GATE 2024 MN Q61 – For the same 1200 kg charge per delay, PPV is 112.5 mm/s at 100 m and 20.3 mm/s at 300 m. Assume PPV=K(D/ Q)-. Find PPV at 200 m, to two decimals.
- GATE 2025 MN Q27 – An explosive’s detonation velocity is10500 m/s. In the shown D’Autriche test the fuse velocity is7000 m/s and the sampling separation is1 m. Find…
- GATE 2025 MN Q46 – A surface-mine blast has burden3.5 m,spacing4.5 m,bench height10 m,subgrade drilling1 m,stemming4 m and charge concentration16 kg/m. One detonator…
- GATE 2026 MN Q17 – Which listed combination is most suitable for underwater rock blasting?
- GATE 2026 MN Q18 – The drivage diagram assigns2.0,3.0 and1.0 kg per hole to Sections1,2 and3 respectively. Consecutive sections have25 ms delay. What is the maximum…
- GATE 2026 MN Q41 – Match sinking methods P piling,Q caisson,R cementation,S freezing to applications:1 alternating strong/loose strata where the drum sinks under its…
- GATE 2026 MN Q58 – Each hole in the displayed bench-blast pattern contains49 kg explosive. Hole labels give delay times in milliseconds. Using the supplied…