What type of rock caused excessive wear on TBM cutters in the Delhi Metro Phase III tunneling?
A. Shale
B. Quartzite
C. Basalt
D. Sandstone
Answer: Option B
Solution (By Examveda Team)
Quartzite is a very hard, abrasive metamorphic rock. In Delhi Metro Phase III, TBMs experienced high tool wear when tunneling through quartzite layers, requiring frequent maintenance and cutter replacements.This Question Belongs to Geological Engineering >> Case Studies And Applied Geological Engineering Projects
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