匈牙利从1926年就开始大规模露天开采铝土矿了。40年代初期,位于地表或接近地表的铝土矿储量耗用殆尽,致使露天开采再也满足不了大规模生产的需要,于是露天开采就逐步转为地下开采。最初,在水位以上的平峒中进行地下开采,然而几年之后,这种矿体也采完了。因此地下开采转到水位以下,而且逐步延深。开始开采铝土矿时,技术水平低,基本上是手工开采,连最繁重的装载作业也靠人工。到50年代中期,开始试用机械化装载。在干矿 Hungary started extensive open-air bauxite mining in 1926. In the early 1940s, the bauxite reserves at or near the surface of the earth were depleted. As a result, open mining could no longer meet the needs of large-scale production. As a result, open-pit mining was gradually converted to underground mining. Initially, underground mining was carried out in flat basins above the water level, however, a few years later, the ore body was also mined. Therefore underground mining go below the water level, and gradually deepened. At the beginning of the mining of bauxite, the technical level was low, basically by hand, and even the heaviest loading was by hand. By the mid-1950s, mechanized loading began. In dry mines