Discussion and Strategy Research to the Influential Factors of Deep Filling Quality

Jinchuan No.2 mine is China's largest backfilled copper-nickel mine which has annual output of 4 million ton ore.Its mining depth has exceeded 1000 meters underground,with the increase of mining depth,underground pressure appears to be much more obvious,which requires very good quality backfill practice to balance the mine safety cost.This paper introduces the Jinchuan No.2 mine deep mining areas stress distribution situation.It focuses on the influence of quality of the filling material,preparation of filling materials,as well as process of backfill.A strategy was researched to maintain the backfill quality,which provides a good reference for deep mining practice.