双鸭山铁矿北区残矿回收技术研究
Study on approach of remnant ore recovery in north region of Shuangyashan iron mine
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摘要: 双鸭山铁矿北区为含不稳岩层的急倾斜中厚矿体,应用浅孔留矿法开采中,由于采场塌冒与上盘围岩过早混入等原因,在220m中段1~12线之间残留了大量矿石。在分析残矿形成原因与残留体形态的基础上,结合矿岩条件,提出进路式回收方案,并较好地解决了方案实施中的相关安全问题。该方案实施一年多来,回收效果良好,实现了残矿安全回收的预期目标。Abstract: The ore body in north region of Shuangyashan Iron Mine is medium thick with a steep dip, a low-grade and a poor stability, and has been mined by means of the short-hole shrinkage method. Lots of ore was remained at the shrinkage stope between 1~12 exploration lines in the 220m level because hanging wall falling. Based on analysising the shape of remnant ore, a drift recovery scheme was proposed. It is proved by analysis and practice that this new scheme has a good practicality in recovery of the remnant ore.
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