Question

In a cut-and-fill stope, the main purpose of backfilling is to

• A. Reduce ore dilution
• B. Prevent high stress concentrations in far field domain
• C. Prevent displacement due to dilation of fractured wall rock
• D. Improve ore rehandling

Hint:

Backfilling mainly provides \[ \boxed{ \text{Ground support and wall stability.} } \]

Answer 1

The Correct Option is C

Step 1: Recall the purpose of backfilling. In cut-and-fill stoping, the excavated void is filled with waste material after ore extraction.

Step 2: State the primary function. Backfill provides support to the surrounding rock mass and prevents movement caused by dilation of fractured wall rocks. Hence, \[ \boxed{\text{Prevent displacement due to dilation of fractured wall rock}.} \] Therefore, \[ \boxed{(C)} \] is the correct answer.