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Metal Mine ›› 2020, Vol. 50 ›› Issue (05): 70-75.

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Non-explosive Machinery Continuous Synergetic Mining Technique for Underground Gold Mine

Chen Wei,Du Kun,Chen Wei   

  1. 1. Huangjindong Mining Industry Limited Company of Hunan,Yueyang 414507,China;2. School of Resources and Safety Engineering,Central South University,Changsha 410083,China;3. Advance Research Center,Central South University,Changsha 410083,China
  • Online:2020-05-15 Published:2020-06-12

Abstract: One of the final goals for mining industry is to realize non-explosive machinery continuous mining method and technology for hard rock mines. With the rapid development of materials and machinery subjects, and the in-depth understanding the theory of unloading rock mechanical properties and rock induced fracture technique, some mines start to practice non- explosive mechanical continuous mining and gain a lot of useful experience. However, the applying conditions for non-explosive machinery continuous mining are still unclear. In view of the detailed storage conditions of Jintang 3# orebody and Yangshanzhuang 202# orebody, a kind of non-explosive machinery continuous synergetic mining method is put forward, i.e. mining gold ore using an EBZ160.Z tunnel boring machine. According to ore body thickness, the cutting width and height of EBZ160.Z tunnel boring machine, and backfilling methods, the specific implementation techniques are given, i.e. horizontal layering and cemented waste rock filling method for thin veins, horizontal layering and cemented tailing filling method for thin veins , horizontal layering and cemented waste rock filling method for thick veins, and horizontal layering and cemented tailing filling method for thick veins. In field practice, the “FRP anchor + high strength fiber mesh + wood” support methods, ore drawing by scraper or loader, and waste rock/tailings cemented backfilling all obtains good results.The study results show that the non-explosive machinery continuous synergetic mining method has the advantages of low mining cost,low labor intensity, high degree of mechanization,continuous operation and high efficiency, which greatly improves the intrinsic safety of the mine.

Key words: Non-explosive, Synergetic mining, Hard rock, Underground gold mine, Road header