Q51
Which parameter indicates the difficulty of shaft sinking in water-bearing formations?
A.
Overbreak ratio
B.
Rock quality designation
C.
Hydrostatic pressure
AnswerD.
Shaft angle
Answer: Option C
Solution
Answer: Option C
Solution:
Hydrostatic pressure reflects the pressure exerted by groundwater.The correct answer is: Hydrostatic pressureIt can cause water inflow during sinking, requiring dewatering or ground freezing.Important in selecting lining and sinking method.