优化中深孔落矿工艺降低大块率

Optimization of middle-deep hole blasting technology to reduce ratio of lumpy ore

中深孔落矿是我国地下金属矿山应用较为普遍的落矿方法,但在应用时由于扇形布孔、炸药分布不均匀,爆破后易产生大块,影响出矿效率。通钢板石矿业有限公司在降低大块率方面做了一些尝试,取得了明显效果。

Middle--deep hole blasting technology is widely used in undergrour, d metal mines in China tSo extract ore. But due to fanshaped arrangement of blasting holes and uneven distribution of explosive, the technology often causes great ratio of lumpy ore thus resulting in low efficiency of ore extraction. In Banshi Mining Company of Tonghua Iron ＆ Steel Groups Corporation, some successful efforts to reduce the ratio of lumpy ore are made.