摘要
西石门铁矿采用无底柱分段崩落采矿法开采。由于采场中存在空区,使落矿爆破时部分矿石被抛入空区而损失。为此,采用了扇形中深孔孔间微差爆破,从而达到了集中爆堆、降低大块率、减少矿石损失的目的。
Sublevel caving without sill pillar is used in Xishimen Iron Mine. Because there are mined-out areas in stops, a part of ore caved is thrown into the mined-out area while ore blasting, resulting in ore loss. In order to solve this problem, the fan middle deep-hole millisecond blasting technique is adopted, thus it is achieved to make the muckpile gather, reduce the boulder yield and the ore loss.
出处
《矿业研究与开发》
CAS
2003年第5期53-54,共2页
Mining Research and Development
关键词
无底柱分段崩落采矿法
微差爆破
采空区
矿石损失
Sublevel caving without sill pillar, Millisecond blasting, Mined-out area, Ore loss
