关键词: 超高水材料, 分段开放式, 预留煤柱, 顶板控制, 充填步距

Abstract: Super high-water material filling developed rapidly in recent years as a “under three” filling mining technology.Based on the research of Super high-water material's properties and experience from experiments and applications in several coal mines recent years，segmentation open back-filling mining with super high-water material was proposed for Liudong Coal Mine，whose coal seam distribution is in large angle.By prearranged coal pillar and build partition walls in roadways to form a closed space for the filling operations，the slurry of super high-water material which has a high liquidity can automatically afflux into “goaf” area and condense in a short time in this way，the condensation body and gangue formed a complete structure which could control overlying strata activity and slow down the land subsidence effectively.The results showed that segmentation open back-filling mining technology brought the super high-water material a greater flexibility in complex geological conditions and made it have a wider application.

Key words: Super high-water material, Segmentation open, Prearranged coal pillar, Roof control, Filling pace