Abstract: Filling method is adopted to control the ground pressure of underground stope of Sanshandao gold deposit at present, mechanized large-scale trackless equipments is combined, takes the leading role in China. Cement and classified tailings are the main binder backfill material of Sanshandao gold deposit, cement sand ratio generally show 1∶8～1∶16, backfill concentration is around 65%, how to ensure mining-filling balance is the important issue facing at present. Meanwhile, reducing the cement proportion of backfill and improving the backfill strength are the main direction in future study.

Key words: Cemented filling, Filling material, Cement-sand ratio, Strength of backfill