煤粉粒子尺寸对爆炸压力的影响研究

摘要：本文研究了煤粉粒子尺寸对爆炸压力及爆炸压力上升速率的影响,研究使用了来自加拿大Lingan煤矿和中国山西大同煤矿的具有3种不同粒子尺寸煤粉。通过试验测试了每种煤粉的最大爆炸压力Pmax和最大压力上升速率(dp/dt)max。研究结果表明在相同的煤粉浓度条件下,随着煤粉粒子尺寸的减小爆炸压力增大;对于不同的煤粉浓度,最大爆炸压力出现在煤粉浓度为500g/m3 时;煤粉的粒子尺寸越小,其爆炸压力上升速率越大,在煤粉浓度为500g/m3 时,爆炸压力上升速率最大。
Abstract： The effect of the particle size of coal dust on explosion pressure and the rising rate of explosion pressure is studied. Three coal dusts from Lingan Coal Mine in Canada and Datong Coal Mine in China are selected to test. The influence of particle size on the maximum explosion pressure Pmax and maximum pressure rising rate (dp/dt)max of each coal dust was tested experimentally. The results indicate that with the decrease of particle size of coal dusts, explosion pressure increases on condition of the same concentration. If the concentration of coal dust is different, the maximum explosion pressure appears at the concentration of 500 g/m3. The smaller the particle size of coal dusts, the larger the rising rate of explosion pressure of coal dust. When the concentration of coal dust is 500 g/m3, the rising rate of explosion pressure of each coal dust is the maximum.