Q95
What is the main concern when driving headings in swelling ground?
A.
High ore loss
B.
Air leakage
C.
Ground pressure and convergence
AnswerD.
Equipment breakdown
Answer: Option C
Solution
Answer: Option C
Solution:
Swelling ground expands upon exposure to air or water.The correct answer is: Ground pressure and convergenceThis can squeeze supports and close tunnels.Requires strong supports and regular re-bolting.