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金属矿山 ›› 2011, Vol. 40 ›› Issue (08): 10-14.

• 采矿工程 • 上一篇    下一篇

深凹高边坡露天矿大孔径水压预裂爆破技术

王德胜1,周庆中2,龚敏1,陶潇鹭1   

  1. 1.北京科技大学土木与环境工程学院;2.北京首钢首云铁矿
  • 出版日期:2011-08-09 发布日期:2011-08-11

Water Pressure Pre-Split Blasting by Large Borehole in High Slope Deep Pit

Wang Desheng1,Zhou Qingzhong2,Gong Min1,Tao Xiaolu1   

  1. 1. College of Civil and Environment Engineering, University of Science and Technology Beijing;2. Beijing Shougang Shouyun Iron Mine
  • Online:2011-08-09 Published:2011-08-11

摘要: 根据露天矿开采延深存在大量炮孔积水的情况,提出了利用大直径垂直钻孔的露天矿水压预裂爆破新概念,探索了一套水压预裂爆破主要技术参数的确定、大孔径预裂爆破效果评定方法、水孔爆破的装药、炮孔堵塞的关键技术和预裂加缓冲爆破实现一次成帮技术。在首云铁矿现场试验取得了降振率65%以上,后冲破裂范围减少38.5%的良好效果,可提高露天高边坡的稳定性,降低边坡维护费用。  

关键词: 水压预裂, 缓冲爆破, 大孔径, 高边坡

Abstract: There appears a lot of water in borehole with the pen pit deepening. The paper described the concept on open-pit water pressure pre-blasting by large-diameter vertical drilling, explored a set of techniques including a method to determine main blasting paramagnets, and the evaluation of water pressure pre-blasting, and the key technique of borehole charging and blasting hole stemming, and instant slope-forming by pre-split and cushion blasting. Through on-site application in Shouyun Iron Ore, a good effect with the ratio of vibration reduction of more than 65%, and backlash burst reduced by 38.5% was obtained. This technique can effectively improve the stability of the open-pit slope and lower slope maintenance costs. 

Key words: Water pressure pre-split, Cushion blasting, Large borehole, High slope