| 不同含水率煤尘在瓦斯爆炸诱导下爆炸传播规律研究 |
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| 引用本文： | 杨前意,石必明,张雷林,张鸿智,王超.不同含水率煤尘在瓦斯爆炸诱导下爆炸传播规律研究[J].中国安全生产科学技术,2019,15(3):25-29. |
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| 作者姓名： | 杨前意 石必明 张雷林 张鸿智 王超 |
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| 作者单位： | (安徽理工大学 能源与安全学院，安徽 淮南 232001） |
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| 基金项目： | 收稿日期: 2019-01-15；数字出版日期:2019-03-22 |
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| 摘 要： | 为了探究不同含水率煤尘在瓦斯爆炸诱导下的爆炸传播规律，利用自行搭建的直管瓦斯爆炸诱导煤尘二次爆炸实验系统，从冲击波压力和火焰传播速度2个方面，研究了不同含水率沉积煤尘在瓦斯爆炸诱导下的爆炸传播规律和原因。研究结果表明:当煤尘含水率小于40%时，管道内沉积煤尘会在瓦斯爆炸诱导下产生二次爆炸，同时沉积煤尘总量一定时，沉积煤尘二次爆炸产生的冲击波超压峰值和火焰传播速度随着煤尘含水率的增加先增大后减小；当沉积煤尘含水率为20% 时，煤尘二次爆炸产生的冲击波超压峰值、火焰传播速度峰值达到最大值，分别为1.657 MPa和468.060 m/s；当沉积煤尘含水率大于40%时，沉积煤尘无法产生二次爆炸，此时爆炸产生的威力小于单一瓦斯爆炸，火焰传播速度衰减较无煤尘的瓦斯爆炸更快，沉积煤尘起到抑制瓦斯爆炸传播的作用。研究结果可以为防治煤尘二次爆炸提供理论依据。
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| 关 键 词： | 含水率 沉积煤尘 传播规律 防爆 |
Study on laws of explosion propagation for coal dust with different moisture contents induced by gas explosion |
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| YANG Qianyi,SHI Biming,ZHANG Leilin,ZAHNG Hongzhi,WANG Chao.Study on laws of explosion propagation for coal dust with different moisture contents induced by gas explosion[J].Journal of Safety Science and Technology,2019,15(3):25-29. |
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| Authors: | YANG Qianyi SHI Biming ZHANG Leilin ZAHNG Hongzhi WANG Chao |
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| Affiliation: | (School of Energy and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China) |
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| Abstract: | In order to explore the explosion propagation laws of coal dust with different moisture contents induced by gas explosion, the laws and reasons of explosion propagation for the deposited coal dust with different moisture contents induced by gas explosion were studied from two aspects of shock wave pressure and flame propagation velocity by using the self built experimental system on secondary explosion of coal dust induced by straight pipe gas explosion. The results showed that when the water content of coal dust was less than 40%, the coal dust deposited in the pipe would produce a secondary explosion induced by the gas explosion, and when the total amount of deposited coal dust was fixed, the peak shock wave overpressure and the flame propagation velocity caused by the secondary explosion of coal dust increased first and then decreased with the increase of moisture content of coal dust. When the moisture content of deposited coal dust was 20%, the peak shock wave overpressure and the peak flame propagation velocity caused by the secondary explosion of coal dust reached the maximum values, which was 1.657 MPa and 468.060 m/s respectively. When the water content of deposited coal dust was greater than 40%, the deposited coal dust would not generate the secondary explosion, at this time, the power generated by the explosion was less than that of single gas explosion, and the attenuation of flame propagation velocity was faster than that of gas explosion without the coal dust, so the deposited coal dust played a role of inhibiting the propagation of gas explosion. The results can provide theoretical basis for the prevention and control of secondary explosion of coal dust. |
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| Keywords: | moisture content deposited coal dust propagation law explosion proof |
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