摘要
针对在矿山巷道开挖中,遇到硬岩导致掘进机械施工速度慢的问题,在某次施工中,采用深孔爆破技术对硬岩进行弱化,并利用窥视孔窥视以及现场观察,对弱化效果进行分析。结果表明对于f=8左右的岩石,深孔爆破松动范围在1.5m至2.5m的范围,弱化效果良好,大大提高了掘进机械的施工速度。
In view of the slow construction speed of tunneling machinery caused by hard rock in coal mine roadway excavation,in an experiment,deep hole blasting technology was used to weaken hard rock,and the weakening effect was analyzed by peeping through peephole and field observation.The results show that for the rock with F=8,the loosening range of deep hole blasting is 1.5m to 2.5m,the weakening effect is good,and the construction speed of tunneling machinery is greatly improved.
作者
方义
FANG Yi(Team 327 of Anhui Bureau of Geology and mineral resources,Hefei 230011,China)
出处
《世界有色金属》
2022年第15期142-144,共3页
World Nonferrous Metals
关键词
硬岩弱化
深孔爆破
巷道掘进
Hard rock weakening
Deep hole blasting
Roadway excavation
