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矿柱(残柱)的回采是一項特別繁重的工作,在技术上又是非常复杂的。矿柱的回采经常大大地落后于矿房的回采工作,这就使得企业的正常生产受到影响。并使完成矿山的生产計划的条件发生困难。采用深孔崩矿法,可以迅速的扭轉这种情况,並使劳动消耗达到最小,同时深孔可以在断面较小的峒室鑽眼,峒室可設計在矿柱的危险范围以外,使得采准作业可以完全在不变动的地段中进行。我矿在1951年开始进行残柱回采。开始时使用浅孔回采,不但劳动生产率低、火药消耗量高,且有些发生变动与裂縫的残柱无法进行回采。自56年采用深孔回采残柱后,不仅显著的提高了劳动生产率(见表5)而且节約了材料,不断地降低了采矿成本和改善了劳动条件,提高了采矿强度,从而保証了生产工作的安全,全坑从55年10月
Mining pillars (residual columns) is a particularly burdensome job, technically complex. Pillar mining often lags far behind the mining work, which makes the normal production of the enterprise affected. And make it difficult to complete the conditions of the mine’s production plan. With deep-hole collapse method, this situation can be quickly reversed and the labor consumption is minimized. At the same time, the deep hole can be drilled in the smaller chamber of the section, and the chamber can be designed out of the dangerous range of the pillar so that mining Quasi-operations can be completely unchanged in the lot. Mine in 1951 started the residual column mining. The initial use of shallow hole recovery, not only low labor productivity, high consumption of gunpowder, and some changes and cracks in the residual column can not be recovered. Since the adoption of the deep hole recovery column in 2006, it has not only significantly improved labor productivity (see Table 5) but also saved materials, continuously reduced mining costs and improved working conditions, and increased mining intensity, thus ensuring production Work safety, all pit from October 55