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首页> 外文会议>Proceedings of the Thirty-Second Annual Conference on Explosives and Blasting Technique vol.2 >Calculation of Effective Charge Weight in Vibration Analysis
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Calculation of Effective Charge Weight in Vibration Analysis

机译：振动分析中有效装料重量的计算

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The question as to what constitutes a true charge weight per delay in multi-hole blasts, and its relation to the resulting vibration signals has been investigated in detail. The 500 kg emulsion test charge was used in single-hole as well as in distributed-hole blasts in two large open-pit coal mines. Tri-axial geophones located in a linear array over a distance range of 200m to 5.6km from the blasts were employed to record the respective vibrations. The results showed that there was a significant difference in the recorded vibration level between a single-hole blast containing a specific amount of explosives, and that of a multi-hole blast containing the same total charge and detonated at the same time. The former yielded consistently higher levels of vibrations, with the maximum variation exceeding 40%. It has been shown that the variation between the two cases is minimized when the 'effective charge weight' is taken to be closer to the square-root or the cube-root of the number of holes detonating at the same time instead of their arithmetic sum.
机译：关于多孔爆破中每个延迟的真实装料重量是什么及其与所产生的振动信号的关系的问题已得到详细研究。 500千克乳化剂测试装料用于两个大型露天煤矿的单孔爆破和分布式孔爆破中。距爆炸200m至5.6km范围内的线性阵列中的三轴地震检波器用于记录各自的振动。结果表明，包含一定量炸药的单孔炸药与包含相同炸药且同时引爆的多孔炸药的记录振动水平之间存在显着差异。前者产生的振动水平始终较高，最大变化超过40％。结果表明，当“有效装料重量”更接近于同时引爆的孔数的平方根或立方根而不是其算术总和时，两种情况之间的差异最小化。

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