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分段崩落法的回采强度大、生产率高、分段巷道維护时間短、結构灵活,在国外的金属矿山得到了广泛的应用。一、资本主义国家使用分段崩落法现状美国上湖地区和瑞典的一些矿山采用分段崩落法比較广泛。法国、意大利和挪威等国矿山也有采用的(图1)。 資本主义国家分段崩落法的結构和开采工艺的发展方向是:尽量簡化采区結构;切割回采工作机械化。采区的結构参数虽然不大,分段高只5～6米,
The subsided caving method has the advantages of strong recovery strength, high productivity, short maintenance time of sub-roadways and flexible structure. It has been widely applied in metal mines abroad. First, the capitalist countries to use the status of subsided caving method The United States Lake and Sweden, some mines using sub-caving method is more extensive. Countries such as France, Italy and Norway are also used (Figure 1). The capitalist countries of sub-collapse of the structure and mining technology development direction is: to minimize mining area structure; cutting mining mechanization. Although the structural parameters of mining area is not large, sub-high only 5 to 6 meters,