In addition, our experiments also indicate that the best depth of blast hole is close to shaft radius.

此外，试验还表明最佳的炮孔深度接近于井筒的半径。

youdao

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。

youdao

The temperature gradient in blast hole was also measured and the temperature gradient was relative to the blast hole depth and its temperature.

同时，还进行了炮孔孔内温度梯度的测量，它与炮孔深度及其温度有关。

youdao

If so, it might blast a hole in the public accounts even bigger than the one patched up by this week's hasty repairs.

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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

The blast knocked out the front of the building, and he stepped through the gaping hole.

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