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无底柱分段崩落采矿法在我国地下矿山中应用占有很大比重,在41座黑、有色大中型崩落法的矿山中约占66％。矿岩不稳固矿山占40％左右,这些矿山矿石损失较严重。如玉石洼铁矿据1978～1985年统计几乎是采一半丢一半;金山店铁矿回采损失率一直在50％以上;丰山铜矿损失率和贫化率在40％以上;小官庄铁矿也在50％左右。造成这些矿石损失原因,有正常的矿石损失:
The pillarless subsidence caving mining method occupies a large proportion of underground mines in our country, accounting for about 66% of the 41 mines with medium-sized and medium-sized caving methods. Mine unstable rock ore accounts for about 40% of the more serious loss of ore mines. Such as jade Wa Wa iron ore statistics from 1978 to 1985 almost half half lost half; Jinshan shop iron ore recovery loss rate has been above 50%; loss and dilution rate of Fengshan Copper Mine in more than 40%; small government iron Mine is about 50%. Causes of these ores loss, there is a normal ore loss: