Application of Hole-by-hole Ignition in Pre-Splitting Blasting
In order to reduce the impact of pre-splitting blasting vibration on stability of high and steep slope, Lanjian Iron Mine carried out an experimental study on the pre-splitting blasting technology of hole by hole. Referring to the theory of millisecond delay blasting and the shaped crack mechanism of pre-splitting blasting, blasting design was made according to three principles including unchanging charging structure of pre-split holes, pre-split and primary holes blast hole by hole and insurance of initiation network. The results of blasting practices showed that though using the technique of hole by hole blasting, which was more than that though using the millisecond blasting between rows,and reduced the damage on steep slope by vibration, the ratio of half-wall hole imprint was up to 96.3％, and the ratio of vibration was lowered by 50％～80％. Meanwhile, with the hole by hole blasting technique, the pre-splitting cracks throughout, spreading out and producing of pre-splitting outline, and the quality of slope produced by pre-splitting blasting were insured.
Surface mining hole by hole blasting pre-splitting blasting Hasting vibrating
GAO Wenyuan ZHAN Shichun
Lanjian Iron Mine of Mining Company of Panzhihua Iron & Steel Group , Panzhihua, Sichuan, China
国际会议
The Asian-Pacific Symposium on Blasting Techniques(亚洲太平洋地区爆破技术研讨会)
昆明
英文
403-405
2007-05-08（万方平台首次上网日期，不代表论文的发表时间）