Q14
What is the major risk when building tunnels in sedimentary rock with dip towards the face?
A.
High strength
B.
Easy excavation
C.
Sliding and collapse along bedding planes
AnswerD.
Increased ventilation
Answer: Option C
Solution
Answer: Option C
Solution:
Dipping sedimentary layers towards the excavation face can result in sliding along bedding planes.This geometry increases failure risks.