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一、问题的提出 在我国冶金矿山、化工矿山及非金属矿山的设计中,经常遇到是否应选用无底柱分段崩落法(以下简称无底柱法)的争论问题。 鉴于无底柱法在条件适合时(注意是条件适合,不是勉强或不适合),具有安全,采掘比小,可对不同品级的矿石进行分采,易于实现机械化和劳动生产率高等优点,故在设计中优先考虑选用此法,是完全合理的。但是,在矿体条件不适合而勉强选用时,当矿山投产后,则势必导致长期进行采矿方法“攻关”,甚至矿石损失率高达40～50％;有的矿山由于长期达不到设计生产
First, the issue put forward In the design of China's metallurgical mines, chemical mines and non-metallic mines, often encountered whether the use of subsea caving should be selected (hereinafter referred to as the method of non-pillar) controversy. In view of the advantages of bottomless column method when the conditions are right (note that the conditions are suitable, not reluctant or unsuitable), safe, small mining ratio, different grade ore separation, easy to realize the advantages of mechanization and labor productivity, so in It is completely reasonable to choose this method to give priority to the design. However, when the orebody conditions are not suitable and reluctantly selected, when the mine is put into production, it will inevitably lead to the long-term mining methods “tackling problems”, or even ore loss rate as high as 40 ~ 50%; some mines due to long-term design and production