Geography · Human Activities
Arrange the following mining methods in sequence based on depth of operational reach, from shallowest to deepest surface penetration:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Placer mining → Shaft mining → Open-cast mining → Underground galleries
- 2Open-cast mining → Shaft mining → Placer mining → Underground galleries
- 3Open-cast mining → Placer mining → Shaft mining → Underground galleries
- 4Placer mining → Open-cast mining → Shaft mining → Underground galleries✓
Correct answer
Placer mining → Open-cast mining → Shaft mining → Underground galleries
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