“大间距集中化无底柱采矿新工艺研究”为国家十五攻关项目 ,已在梅山取得重大进展。无底柱分段崩落法产量占我国地采铁矿石的 80 %以上。我国无底柱分段崩落法长期以来采用小结构参数及低效风动设备 ,致使劳动生产率低下、生产规模偏小、生产成本高 ,已严重制约了该采矿方法在 “Research on New Technology of Centralized Bottomless Pillar Mining with Large Pitch” has made great progress in Meishan for the national key project of 15th national defense. Slitless subsidence caving production accounted for more than 80% of China’s mining iron ore. The pillarless caving method in China has long adopted small structural parameters and inefficient wind-driven equipment, resulting in low labor productivity, small scale of production and high production costs, which have seriously hampered the mining method in