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GATE 2026 MN – Question 25

Mining Methods and Machinery · Mining Methods · 1 mark · Multiple choice

A20 m thick orebody dips75°. Both ore and host rock are strong, and production drilling of150–200 mm diameter is proposed. Which stoping method fits?

  1. Block caving
  2. Long-hole stoping
  3. Shrinkage stoping
  4. Post-and-pillar stoping

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Correct answer: (B) Long-hole stoping

Explanation

Strong ore and walls support open stopes, while the steep dip and proposed large-diameter production drilling favour long-hole stoping. Thus B. Block caving relies on caving behaviour; shrinkage and post-and-pillar methods do not best match the specified geometry and mechanisation.

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