The mechanic affection on the blast hole walls is simply analysed and cracking propagation caused by shaped charge is explained in this paper.

简单分析了聚能爆破装药在孔内爆破的力学效应，阐明了聚能爆破对岩石定向破裂的控制机理。

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Using cement slurry to support the hole walls and plug the leaky zones is one of the effective ways in drilling construction to deal with the troublesome zones.

水泥浆护壁堵漏是钻探施工对付复杂地层的有效方法之一。

youdao

They fired Ecstasy Theater gas, and explosion in the building the walls of a hole.

他们向剧院发射了迷魂气，并在大楼墙壁上炸开一个洞。

youdao

And hole in the walls that people don't even know about, and they are just like, they line the streets.

那儿有人们都不知道的小店铺，它们就像，排列在大街上一样。

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Around 3, 000 buildings were damaged by the blast, which blew a hole in the walls of a metals factory in Chelyabinsk, approximately 900 miles east of Moscow.

WSJ: Meteorite Hits Russia, Causing Panic