The reasonable hole pattern of deephole blasting was utilized to make fully use of the explosive energy to improve the crushed ratio to lower the boulder yield and to obtain better dam rocks.

深孔爆破采用合理的布孔方式，使炸药爆炸能量得以充分发挥，破碎率提高，大块度降低，从而获得较理想的堆石坝石料。

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The parameters and layout of linear shaped charge, and the hole-pattern parameters, charging structure and priming method for long-hole blasting were discussed.

讨论了线形聚能装药的参数、设置方法以及深孔爆破的布孔参数、装药结构、起爆方法。

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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.

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。

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