甲烷煤尘耦合爆炸传播特性及伤害研究

doi:10.16265/j.cnki.issn1003-3033.2022.01.010

中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (1): 72-78.doi: 10.16265/j.cnki.issn1003-3033.2022.01.010

甲烷煤尘耦合爆炸传播特性及伤害研究

景国勋¹^,²(), 彭乐¹^,^**(), 班涛¹, 贺祥¹, 孙跃¹

¹河南理工大学安全科学与工程学院,河南焦作 454003
²安阳工学院,河南安阳 455000

收稿日期:2021-10-12 修回日期:2021-12-15 出版日期:2022-01-28
通讯作者:
^**彭乐(1994—),女,河南方城人,博士研究生,主要研究方向为甲烷煤尘爆炸。E-mail: 2747758790@qq.com。
作者简介:
景国勋(1963—),男,河南襄城人,博士,教授,博士生导师,主要从事安全系统工程、瓦斯煤尘爆炸等方面的研究。E-mail: gxjing@hpu.edu.cn。
景国勋教授
基金资助:
国家自然科学基金联合基金重点项目资助(U1904210); 国家自然科学基金资助(51774120)

Research on pressure propagation and injury of methane and coal dust coupled explosion

JING Guoxun¹^,²(), PENG Le¹^,^**(), BAN Tao¹, HE Xiang¹, SUN Yue¹

¹School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China
²Anyang Institute of Technology, Anyang Henan 455000, China

Received:2021-10-12 Revised:2021-12-15 Published:2022-01-28

摘要/Abstract

摘要：

为探究煤尘质量浓度对甲烷煤尘耦合爆炸传播特性及伤害距离的影响,自制长15 m的爆炸管道系统,用体积分数为7%甲烷分别与质量浓度为0、50、100和200 g/m³的煤尘进行耦合爆炸试验,并根据质量、动量和能量守恒理论推导出最大压力计算公式。结果表明:不同质量浓度煤尘与甲烷耦合爆炸时,最大压力均随与爆源距离的增加呈现出先减小再增加最后逐渐减小的趋势;随着煤尘质量浓度增加,爆炸腔内最大压力先增加后减小;传播管道内最大压力随煤尘质量浓度的增加而增大,且最大压力与距爆源距离的平方根成反比。依据超压准则划分的死亡、重伤和轻伤距离均随煤尘质量浓度的增加而增加,轻伤距离随煤尘质量浓度变化的波动范围最大,死亡距离波动最小。

关键词: 甲烷煤尘, 耦合爆炸, 最大压力, 传播特性, 伤害距离

Abstract:

In order to study influence of coal dust's mass concentration on propagation and injury distance of methane and coal dust coupled explosion, a self-made 15m explosion pipeline system was used for an experiment where 7% methane and coal dust at different mass concentration(0, 50, 100 and 200 g/m³) had coupled explosion. Then, maximum over-pressure calculation model was derived from conservation laws of mass, momentum and energy. The results show that in coupled explosion, the maximum over-pressure decreases at first and increases and then decreases gradually along with the increase of distance from explosion source. As mass concentration of coal dust increases, the maximum over-pressure in explosion cavity first increases and then decreases, while that in propagation pipeline increases with it, and is inversely proportional to the square root of distance from explosion source. Moreover, distances of death, serious injury and minor injury all increase with the increase of dust concentration whose change has the greatest impact on distance of minor injuries and the least on that of death.

Key words: methane and coal dust, coupled explosion, maximum over-pressure, propagation characteristic, injury distance

景国勋, 彭乐, 班涛, 贺祥, 孙跃. 甲烷煤尘耦合爆炸传播特性及伤害研究[J]. 中国安全科学学报, 2022, 32(1): 72-78.

JING Guoxun, PENG Le, BAN Tao, HE Xiang, SUN Yue. Research on pressure propagation and injury of methane and coal dust coupled explosion[J]. China Safety Science Journal, 2022, 32(1): 72-78.

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甲烷煤尘耦合爆炸传播特性及伤害研究

Research on pressure propagation and injury of methane and coal dust coupled explosion

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