在探井掘进过程中,遇到較坚硬的岩石,就需打眼爆破,其起爆方法不外乎电起爆和点火起爆。而目前在我們勘探部门的探井施工中又以人工点火起爆为最多,有的是人工在井下点火后再提升上来,这是比較危險的。我們在实际工作中採用了火圈点火起爆,根本上保証了安全,同时也提高了掘 In the process of exploration drilling, encountered more hard rock, you need to blasting the hole, the initiation method is nothing more than electric detonation and ignition initiation. At present, in our exploratory department exploration wells, artificial ignition is the most frequently initiated, and some are manually raised in the underground after ignition, which is more dangerous. We use the fire circle in the actual work of ignition, fundamentally guaranteed safety, but also improve the digging