基于老尾矿再选的空区协同治理与矿柱资源回采研究
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紫金(长沙)工程技术有限公司

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STUDY ON COLLABORATIVE TREATMENT OF GOAFS AND PILLAR MINING BASED ON TAILINGS RE-CONCENTRATION
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Zijin ( Changsha) Engineering Technology Co,Ltd,Chagnsha

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    摘要:

    采用Flac3D模拟分析了充填治理采空区后矿柱稳定性情况,发现其稳定性显著改善。首先采用挖机干式回采、造浆后管道输送的方式,将老尾矿库尾砂与破磨后的矿石一同进入再磨流程。然后通过增加深锥浓密系统和混凝土拖泵来分别提高尾砂利用率和充填距离,优化改造现有充填系统,将再选后的全尾砂排入深锥浓密机,经制备成充填料浆充填采空区,实现了采一矿区采空区全尾砂胶结充填治理。最后采用环形中深孔爆破回采顶底柱,采用以切割天井为自由面深孔爆破崩落回采间柱,遥控铲运机出矿,矿柱回采率70%~80%,取得了显著的经济效益。

    Abstract:

    The pillars stability after filling the goafs was simulated,and the results show that the stability have been significantly improved. Firstly,tailings in the old tailings reservoir were mined by excavator,pulped,pumped to the plant and then entered the regrinding process together with the crushed and grinded ores to re-concentate. Then,the existing filling systems was optimized and retrofited by adding the deep cone thickening system and the concrete towing pump for improving the utilization rate of tailings and increasing the filling distance respectively,the full tailings were conveyed to the deep cone thickener,which were then made into the cemented full tailings slurry to fill the goafs of Cai 1# mining area. The top and bottom pillars were mined by ring medium-deep blasthole,the middle pillars were mined by deep blasthole with a cut-raise as blasting space,and the remote scraper was used for ore carrying. The mining rate of pillars was 70% ~80%. Comprehensive utilization of residual mineral resources has achieved remarkable economic benefits.

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  • 收稿日期:2022-12-13
  • 最后修改日期:2023-01-13
  • 录用日期:2023-01-17
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