A backfill mixture commonly includes:
A. Coal and water
B. Cement, tailings, water
C. Lime and clay
D. Silica and gravel
Answer: Option B
Solution (By Examveda Team)
Backfill restores voids with a stable mixture.The correct answer is: Cement, tailings, waterSupports ground, reduces surface subsidence, and helps waste disposal.Can be placed hydraulically or mechanically.This Question Belongs to Mining Engineering >> Mine Development And Mining Methods
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