ANALYSIS OF GEOLOGICAL ENVIRONMENT DAMAGE INDUCED BY DOWNWARD CEMENTED BACKFILL MINING OF STEEP METAL DEPOSIT

Based on a large amount of on-site monitoring date, the characteristic of engineering geological phenomena induced by downward cemented backfill mining in Jinchuan No.2 mine is analyzed in detail, which mainly contains land subsidence and ground fissure, and point out these characteristics induced by underground mining with downward cemented backfill are different from coal mining, then, the author integrate them with concrete conditions and examples, analyze and study its effects on surface structure and underground works, then some reasonable suggestions to prevent and alleviate the problem are advised.