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首页> 外文会议>Asia-Pacific Conference on Shock Impact Loads on Structures >EXPERIMENTAL INVESTIGATION ON THE EFFECT OF BUBBLE ENERGY LOADING IN ROCK BLASTING
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EXPERIMENTAL INVESTIGATION ON THE EFFECT OF BUBBLE ENERGY LOADING IN ROCK BLASTING

机译：泡沫能量荷载对岩爆发作用的实验研究

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摘要

In order to investigate into the effect of bubble energy (E_b) loading in rock fragmentation under the explosion of a coupling charge within borehole, two groups of contrast fragmentation experiments were conducted in cylindrical concrete models. In the first group, the charge with the constant ratio of shock energy (E_s) to E_b was used to break the models with different acoustic impedance. In the second group, the models with the constant impedance were separately broken by the charges with the different ratio of E_s to E_b. The experimental results showed that, with increase in the peak (P_t) of the transmission compressive stress in the borehole's wall, the mass of small size fragments of the first group rose while that of the second group decreased. The analysis results indicated that the mass of small size fragments depends on the level of both E_s impact and E_b loading dynamically against the surrounding media. Single P_t merely represents the level of E_s impact. Change in the mass of small size fragments relating to E_b loading may imply that, besides the action of quasi-static gases pressure on the wall of borehole, E_b stored in the detonation gases plays an active role in rock fragmentation by loading dynamically.
机译：为了在钻孔内的耦合电荷爆炸下调查岩石碎片在岩石碎片中的效果，在圆柱形混凝土模型中进行两组对比碎片实验。在第一个组中，使用震源（E_S）与E_B恒定比率的电荷用于打破具有不同声阻抗的模型。在第二组中，具有恒定阻抗的模型被e_s与e_b的不同比率的电荷分开断开。实验结果表明，随着钻孔壁中的透射压缩应力的峰（P_T）的增加，第一组的小尺寸片段的质量升高，而第二组的升级率下降。分析结果表明，小尺寸片段的质量取决于e_s冲击的水平和e_b加载到周围媒体。单个P_T仅表示E_S影响的级别。与E_B加载有关的小尺寸片段的变化可能暗示，除了准静态气体压力在钻孔壁上的动作之外，存储在爆炸气体中的E_B通过动态加载在岩石碎片中起着积极作用。

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