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丰山铜矿新型充填挡墙构筑技术研究

Research on construction technology of new backfill bulkhead in Fengshan Copper Mine

  • 摘要: 充填挡墙作为充填作业不可或缺的组成部分,发挥着隔离采空区的作用,确保充填料浆被封闭在采空区内,防止其外泄带来的潜在风险。针对丰山铜矿充填料浆特性,对在不同充填高度情况下充填挡墙的侧向压力分布情况进行分析,得到充填挡墙总压力、最大竖向弯矩与一次充填高度变化关系,最终确定丰山铜矿井下一次充填高度不超过1.5 m。参考国内外矿山充填挡墙构筑经验,结合丰山铜矿实际情况提出钢筋混凝土挡墙、砖砌挡墙与钢支架柔性挡墙构筑技术,并结合矿山现有技术装备情况,确定3种充填挡墙的详细构筑工艺。简要分析了充填挡墙在丰山铜矿的应用情况,并确定后续充填挡墙构筑优化方向应为柔性挡墙。本研究通过对丰山铜矿充填挡墙构筑的理论与工艺进行研究,可为其他金属矿山提供工程经验。

     

    Abstract: As an indispensable element in backfill operations, the backfill bulkhead serves a crucial role in isolating the goaf, ensuring that the backfill slurry remains contained within the goaf, and mitigating potential hazards arising from its leakage. Based on the properties of backfill slurry in Fengshan Copper Mine, this paper analyzed the lateral pressure distribution on the backfill bulkhead under different backfill heights and obtained the relationship between the total pressure and maximum bending moment on the backfill bulkhead and changes in the backfill height. Consequently, it was concluded that the maximum backfill height of each filling should not exceed 1.5 m. Drawing inspiration from both Chinese and international expertise in constructing backfill bulkheads and based on the actual conditions of the Fengshan Copper Mine, construction techniques for cast-in-place reinforced concrete bulkheads, brick masonry bulkheads, and steel-supported flexible bulkheads were proposed. In combination with the mine’s existing technical equipment, detailed construction procedures for the three types of backfill bulkheads were determined. A brief analysis was conducted on the application of backfill bulkheads at the Fengshan Copper Mine, and it was recommended that the future optimization direction for bulkhead construction should focus on flexible bulkheads. Through theoretical and procedural research on the construction of backfill bulkheads at the Fengshan Copper Mine, this paper can provide valuable engineering experience for other metal mines.

     

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