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.
为了考查无空孔直眼掏槽爆破参数，采用数值模拟方法研究单自由面垂直炮孔的爆炸作用问题。
To investigate the parameters of parallel cut blast without empty holes, an advanced numerical method is used to study the explosion effect of charge in hole perpendicular to a free surface.
数值模拟结果表明，在堵塞条件一定时，单自由面垂直炮孔爆破漏斗与装药长度无关。
The results indicate that there is no relationship between the explosion crater and the length of the charge under a certain stemming condition.
由于炮孔堵塞不牢和初始自由面利用不充分，井下平巷的掘进开挖爆破仍存在投入大、爆破结果欠理想等问题。
Because of the weak borehole sealing and inadequate use of the initial free face, the higher investment and unsatisfactory blasting effect still exist in the mine tunnel excavation blasting.
岩体爆破开挖过程中，开挖荷载瞬态卸荷伴随着爆破破岩的裂纹扩展、爆生气体逸出以及新自由面形成等过程而发生。
The transient release of excavation load is accompanied by the development of cracks, the outburst of detonation gases and the formation of new free surface during the rock fragmentation by blasting.
本文还指出了倾斜自由面与水平自由面爆破抛掷漏斗等抛距图的本质区别。
The paper also points out the essential differences between the graph of equidistant lines …
本文还指出了倾斜自由面与水平自由面爆破抛掷漏斗等抛距图的本质区别。
The paper also points out the essential differences between the graph of equidistant lines …
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