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五十年代初期,瑞典基鲁纳铁矿首先开始应用无底柱分段崩落采矿法。当初,此法曾是该矿较理想的采矿法。但随着开采工作向深部发展,为解决因岩体应力增大而出现的一些问题(主要是为克服在维护回采进路方面的困难,增加了分段高度和回采进路间距,结果使贫化增大),近期基鲁纳矿正在对新的采矿法——分段留矿崩落采矿法进行现场试验,拟代替无底柱分段崩落法。 在国内,许多矿山从六十年代后期开始陆续改用无底柱分段崩落法。有的矿山取得了比原用采矿法较好的效果(但矿损贫化不够令人满意);有的矿山则未取得预期效果,
In the early 1950s, the Kiruna Iron Ore in Sweden first started to apply the pillarless subsidence caving method. At first, this method had been the mine more ideal mining law. However, with the deep development of the mining work, in order to solve some problems arising from the stress increase of the rock mass (mainly to overcome the difficulties in maintaining the recovery route, the height of the section and the distance between the recovery roads are increased. As a result, ), The recent Kiluna mine is a new mining method - section of the underground ore caving mining method for field trials, to be replaced by non-pillar sub-caving method. In China, many mines have been gradually converted to pillarless caving methods since the late 1960s. Some mines have achieved better results than the original mining method (but the mining loss is not satisfactory enough); some mines did not achieve the expected results,