Effect of particle size of coal dust on explosion pressure

JIAO Feng-yuan1,2, ZHANG Hua-rong3, CAO Wei-guo3, FANG Fan4

（1. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China;2. College of Information and Business, North University of China, Jinzhong 030600, China; 3. School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China;
4. PLA Unit 63961, Beijing 100012, China）

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.

Key words： coal dust; explosion pressure; explosion pressure rising rate; dust explosion; particle size

CLD number： X932  Document code： A

Article ID： 1674-8042（2019）03-0223-03  doi： 103969/j.issn1674-80422019-03-004

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煤粉粒子尺寸对爆炸压力的影响研究

焦枫媛1，2， 张华荣3， 曹卫国3， 方帆4

（1. 中北大学 信息与工程学院， 山西 太原 030051； 2. 中北大学 信息商务学院， 山西 晋中 030600；3. 中北大学 环境与安全工程学院， 山西 太原 030051； 4. 解放军63961部队， 北京 100012）

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 500 g/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 500 g/m3时， 爆炸压力上升速率最大。

关键词:煤粉； 爆炸压力； 爆炸压力上升速率； 粉尘爆炸； 粒子尺寸

引用格式：JIAO Feng-yuan, ZHANG Hua-rong, CAO Wei-guo, et al. Effect of particle size of coal dust on explosion pressure. Journal of Measurement Science and Instrumentation, 2019, 10（3）： 223-225. ［doi： 103969／j.issn1674-80422019-03-004］

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