瓦斯-煤尘混合爆炸中煤尘因素的影响广义化研究

Generalized Study on the Influence of Coal Dust Factors in Gas-Coal Dust Hybrid Explosion

为研究煤尘粒径和煤尘质量浓度对瓦斯-煤尘混合爆炸特性影响的普适性规律,通过自行搭建的试验管网进行瓦斯-沉积煤尘混合爆炸试验,广义化探究煤尘质量浓度和煤尘粒径对瓦斯-煤尘混合爆炸在复杂管网中产生的冲击波压力峰值、火焰波传播速度峰值和火焰波温度峰值的影响,并基于影响因素响应面理论分析验证了试验结论。结果表明:当煤尘粒径相同时,瓦斯-煤尘混合爆炸的冲击波压力峰值、火焰波传播速度峰值和火焰波温度峰值会随着煤尘质量浓度的增大呈现先增大后减小的趋势;当煤尘质量浓度相同时,瓦斯-煤尘混合爆炸产生的冲击波压力峰值、火焰波传播速度峰值和火焰波温度峰值同样会随着煤尘粒径的增大呈现先增大后减小的趋势;当煤尘粒径和煤尘质量浓度分别为50μm、100 g/m^(3)时,瓦斯-煤尘混合爆炸最为剧烈;煤尘质量浓度对瓦斯-煤尘混合爆炸产生的冲击波压力峰值和火焰波温度峰值的影响程度大于煤尘粒径,煤尘粒径对火焰波传播速度的影响程度大于煤尘质量浓度。该研究结果可为煤尘对瓦斯-煤尘混合爆炸的影响研究提供理论参考。

To study the universal law of the influence of coal dust particle size and coal dust mass concentration on gas-coal dust hybrid explosion,this paper carries out the gas sedimentary coal dust explosion test through the self-built test pipe network,and generalizes the influence of coal dust mass concentration and coal dust particle size on shock wave pressure peak,flame wave propagation velocity peak and flame wave temperature peak of gas-coal dust hybrid explosion in complex pipe system.Then the paper verifies the test conclusion based on factor response surface theory.The results show that when the particle size is the same,the shock wave pressure peak,flame wave propagation velocity peak and flame wave temperature peak of gas-coal dust hybrid explosion first increase and then decrease with the increase of coal dust mass concentration;when the mass concentration of coal dust is the same,the shock wave pressure peak,flame wave propagation velocity peak and flame wave temperature peak of gas-coal dust hybrid explosion will also increase first and then decrease with the increase of coal dust particle size;when the particle size and mass concentration of coal dust are 50μm and 100 g/m^(3),the gas-coal dust hybrid explosion is the most violent.The influence of coal dust mass concentration on the shock wave peak pressure and flame wave temperature of explosion is greater than that of coal dust particle size,and the influence of coal dust particle size on the propagation speed of flame wave is greater than that of coal dust mass concentration.The research results can provide theoretical reference for the study of the influence of coal dust on gas-coal dust hybrid explosion.