《黄金》杂志(月刊) 第38卷 总第396期
2017年02月 第02期
目次
采矿工程
  • 毛坪铅锌矿水平矿柱形成与回采方法试验研究及应用……程国龙,乔登攀,王 俊,马卓宇,黄 灏,沐兴旺
  • 摘 要:毛坪铅锌矿采用下向水平分层矩形进路式胶结充填采矿法,在多中段同时回采条件下,随着开挖深度的增加,将会出现760中段和720中段2个水平矿柱。水平矿柱何时形成与破坏,以及如何在保证开采安全的前提下最大限度地回收矿柱,是矿山目前遇到的难题。采用Flac3D数值模拟软件,分析了矩形进路采场结构条件下水平矿柱形成与破坏过程,得出当720中段未开挖矿体厚度为24 m时,水平矿柱形成;厚度减小为21 m时,水平矿柱完全被破坏。然后模拟分析采用六边形进路开采过程,最终提出毛坪铅锌矿应用下向水平分层六边形进路式胶结充填采矿法能够保证水平矿柱回采过程稳定,最大程度回收水平矿柱资源,为矿山生产提供指导。
  • 关键词:向分层充填采矿法;矩形进路;六边形进路;数值模拟;水平矿柱;Flac3D软件

    Experimental study on the formation and extraction of horizontal pillars in Maoping Lead-Zinc Mine and its application……Cheng Guolong,Qiao Dengpan,Wang Jun,Ma Zhuoyu,Huang Hao,Mu Xingwang

    AbstractMaoping Lead-Zinc Mine is now using the multi-level downward rectangular drift cut-and-filling stopping mining method.In the presence of multi-level mining,2 horizontal pillars of Level 760 and Level 720 will form gradually with increasing mining depth.The challenge is to know when the formation and destruction of horizontal pillars are to happen and how to make maximum recovery of pillars while ensuring mining safety.This paper uses Flac3D to simulate the formation and destruction of horizontal pillars with rectangular filling route,concluding that horizontal pillars form when the thickness of the orebody to mine in Level 720 is 24 m,and destroy when the thickness reduces to 21m.Then the mining process with hexagonal filling route is simulated.Finally,it is concluded that downward hexagonal drift cut-and-filling stopping mining method can ensure the stability of the horizontal pillar mining process in Maoping Lead-Zinc Mine,making maximum recovery of pillars and guiding the production of the mine.

    Keywords:downward drift cut-and-filling stopping mining method; rectangular filling route;hexagonal filling route; numerical simulation; horizontal pillar; Flac3Dsoftware

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