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在应用无底柱分段崩落法的金属矿山,倾斜矿体的矿石损失率高达15%~25%。实验研究了进路回采后矿石残留体位置与形态,针对放矿残留体和本分段未崩落的间柱及未崩落的下盘三角矿等下盘残留体,提出了利用移动方程圈定迁移残留体的方法,以及主矿体回采后在下盘(或底板)开拓回采进路二次回采残留矿量的方法,并在符山铁矿采用两条进路之间重新布置小尺寸回采进路的方式,有效回采了4476t采场下盘残留矿量。
In the use of non-pillar subsidence caving metal mines, ore tilting ore loss rate as high as 15% to 25%. In this paper, the position and shape of ore residues after the mining are studied experimentally. According to the residues of ore bodies and the remaining pillars such as the inter-pillar that does not collapse in this sub-section and the lower plate triangular ore that does not collapse, Method and the method of exploiting the secondary recovery of residual ore in the bottom plate (or bottom plate) after the main ore body is recovered and re-arranging the small-size recovery channel between the two approaches in Fushan Iron Mine Way, the effective recovery of 4476t stope remaining volume of mine.