迁安铁矿在鞍山式磁铁贫矿床中是一个较为复杂的矿床。矿体呈多层状产生,夹层较多,约占矿层总厚度的23％,其中夹层大于5米的占12.3％,这给采矿带来很大困难。经常要用电铲从矿石中挑选岩石,或在夹石中挑选矿石,加上管理不善,因此,矿石的损失贫化较为严重。1964年矿石损失率达13.68％,贫化率达5.67％。该矿为了降低损失贫化,提高回采率,1965年以 Qian’an Iron Mine is a more complex deposit in the Anshan-type magnetite lean deposit. The orebodies are multilayered, with more interbed, accounting for about 23% of the total thickness of the ore body, of which 12.3% of the mezzanine is larger than 5 meters, which brings great difficulties to mining. Often rock shovels are used to pick the rock out of the ore or to pick the ore in the rock, with poor management, so depletion of the ore is more severe. In 1964, the ore loss rate reached 13.68% and the depletion rate reached 5.67%. The mine in order to reduce the loss of depletion, increase recovery rate, 1965