Q8
Which method is used to stabilize old mine workings beneath infrastructure?
A.
Sand compaction
B.
Grouting
AnswerC.
Soil replacement
D.
Electro-osmosis
Answer: Option B
Solution
Answer: Option B
Solution:
Grouting involves injecting cementitious materials to fill voids and fractures in abandoned mine areas. This is a critical step in preventing ground subsidence under buildings and roads.