Research on throw characteristics of rock debris explosion based on coupled FLUENT-EDEM
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摘要: 为了研究弹丸起爆后岩土碎屑的抛掷特性, 针对爆炸后侵彻通道内复杂的气固两相流动问题，提出了一种FLUENT软件与EDEM软件联合的数值模拟方案，分析了不同深径比条件下钻地通道内介质碎屑的抛掷过程。进一步研究了介质碎屑运移特性的影响因素。结果表明：介质碎屑的运移能力与爆炸荷载峰值成正比，与钻地通道深径比及碎屑粒径成反比。Abstract: In order to study the throw characteristics of rock debris after explosion, with a view of solving complicated problems involved in the two-phase gas-solid flow in a penetration channel, we propose a simulation scheme combining the use of FLUENT and EDEM softwares. Based on this scheme, we analyzed the medium debris's blasting process for different depth-diameter ratios and studied the factors that bear on the debris's transporting characteristics. The results show that debris transporting capability is directly proportional to the peak value of the explosion load, and is inversely proportional to the ratio of the channel depth to the channel diameter and the debris particle size.
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图 4 不同深径比下对称轴上碎屑体积分布
Figure 4. Debris volume distribution on symmetrical axis with different γ
图 8 抛距x、抛高y随着荷载的变化
Figure 8. Variation of throw distance x and throw height y with loading
图 9 不同碎屑直径下通道内碎屑体积分数云图
Figure 9. Debris volume fraction contours for different debris particle sizes
图 10 不同碎屑粒径下碎屑体积分数分布曲线
Figure 10. Curves of volume fraction under different debris particle sizes
图 11 抛距x、抛高y随着碎屑粒径的变化
Figure 11. Variation of throw distance x and throw height y with debris particle size
表 1 材料参数
Table 1. Material parameters
材料 ν G/Pa ρ/(g·cm-3) 碎屑颗粒 0.2 5×107 2.6 钻地通道 0.2 5×107 2.6 弹体 0.3 7×1010 7.8 
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