关键词: 主溜井, 破碎站, 放矿系统

Abstract: Dahongshan Iron Mine Phase II project adopts 200m high and middle section develop⁃ ment，multi section inclined shaft belt relay transportation of ore，and adopts sublevel caving mining with⁃ out sill pillar. Due to the high height of the middle section，the chute after ore collection and transportation is relatively deep，and there is a level of ore collection and transportation from the uppermost unloading sta⁃ tion to the crushing station at the bottom. In order to ensure the operation safety of the deep ore pass and the unloading station，and the simultaneous production of the two ore collection and transportation sec⁃ tions，the waterfall type ore pass layout is adopted. At the same time，the ore drawing system is combined in the waterfall type ore pass system，so that the ore pass has the function of transporting ore，and the prob⁃ lem of continuous production of the large-scale mine ore pass system is solved. The field application and the monitoring results of the chute show that，except for the influencing factors of the surrounding rock，the chute basically belongs to normal scouring damage，and the application of the waterfall chute in Phase Ⅱ project of Dahongshan Iron Mine is successful.

Key words: main draw shaft, crushing station, ore drawing system