| 露天矿大区多排微差爆破技术的研究与实践 |
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| 作者单位： | ;1.长沙矿冶研究院，本溪钢铁公司南芬铁矿，湖南省爆破学会 |
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| 摘 要： | 论述了大区多排深孔微差爆破的合理规模、改善爆破破碎质量的途径和异步分区起爆与大规模干扰降震方案。八次大区微差爆破生产试验结果表明：大块率降低８３％，平均降震率达２８．６％，并显著减少了根底。
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| 关 键 词： | 深孔爆破，露天采矿，大区多排微差爆破，干扰降震 |
A STUDY AND PRACTICE OF LARGE SCALE AND MULTIPLE ROW MILLISECOND BLASTING IN OPEN PIT IRON MINE |
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| Affiliation: | ,Liao Xiankui(Changsha Research Institute of Mining and Metallugy)Li Mingjian(Nanfen Iron Mine of Benxi Iron & Steel Company) |
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| Abstract: | This paper discusses the reasonable scale of massive multiple row millisecond blasting, approaches to improving fragmentation quality,and options for reducing vibration by asynchronous zoning initation with large scale interference,Production tests of 8 large scale millisecond blasts showed good results,such as reducing boulder percentage by 83%, vibration by 28.6%with toe rock dispeled. |
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| Keywords: | Long-hole blasting Open pit mining Mssive multiple row millisecond blasting Vibration reduction by interference |
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