采用定向控制爆破，选用合理爆破参数、炮眼排列、导向装置，准确地按设计方向，安全地拆除了砖质烟囱。
In the oriented blasting, proper demolition parameters, boring pattern and orienting devices are chosen in order to demolish a brick chimney safely and exactly according to the designed direction.
根据爆破自由面形成的时间和破碎岩石飞行的时间，探讨了深孔爆破各作用炮眼的合理延期时间；
According to the time to form the blasting free face and the time for the broken rock flying, the paper discussed the rational delay time of each functional borehole in deep borehole blasting.
一个爆破炮眼组包括掏槽眼、辅助眼、压眼和边界眼。
A blast round consists of cut, relief, breast, and trim holes.
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