露天采场边坡控制爆破的改进

Improvement of Control Blasting at Open-pit Slope

通过分析大冶铁矿露天采场硬岩边坡区普遍产生预裂墙和预裂根底、在不稳定边坡区产生爆破预扰动带的现象，认为传统的预裂－缓冲爆破存在机理性缺陷．推荐的缓冲－光面爆破克服了这种缺陷，可取得光壁护坡的效果。对露采边坡控制爆破提出了新见解。

Based on the slope analysis in Daye Open-pit iron Mine,generally,the presplitting wall and presplitting toe rock are appeared at the slope areas consisted of the hard rock,and the pre-disturbingzone caused by blasting are appeared at the instable slope areas. This is because of the traditional presplitting-buffering blasting exists some mechanism defects, and the recommeded buffering-smooth blasting not exists these defects,contrarily,it have the effects of making rock wall smooth and protectingslope. In addition,the new ideas for the control blasting at open-pit slope are put forward in this paper.