燃料物性参数对瓦斯煤尘复合爆炸的耦合作用

郭佳琪; 裴蓓; 徐梦娇; 李世梁; 韦双明; 胡紫维

doi:10.11883/bzycj-2022-0300

燃料物性参数对瓦斯煤尘复合爆炸的耦合作用

doi: 10.11883/bzycj-2022-0300

郭佳琪^{1, 2,},
裴蓓^{1, 2, ,},
徐梦娇^{1, 2},
李世梁^{1, 2},
韦双明^{1, 2},
胡紫维^{1, 2}

1.
煤炭安全生产与清洁高效利用省部共建协同创新中心，河南焦作 454003
2.
河南理工大学安全科学与工程学院，河南焦作 454003

基金项目: 中国博士后科学基金(2019T120622)；河南省高校科技创新人才支持计划（22HASTIT027）；河南省科技攻关项目（212102310006）

详细信息

作者简介:
郭佳琪（1997－　），女，硕士研究生，guojq1997@home.hpu.edu.cn

通讯作者:
裴　蓓（1982－　），女，博士，副教授，smart128@126.com

中图分类号: O389; X932
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- 被引次数: 0
出版历程
- 收稿日期: 2022-07-11
- 修回日期: 2022-08-22
- 网络出版日期: 2022-09-09
- 刊出日期: 2022-11-18

Coupling effect of fuel property parameters on gas/coal dust composite explosion

GUO Jiaqi^{1, 2
,},
PEI Bei^{1, 2
, ,},
XU Mengjiao^{1, 2},
LI Shiliang^{1, 2},
WEI Shuangming^{1, 2},
HU Ziwei^{1, 2}

1.
Collaborative Innovation Center of Coal Safety Production of Henan Province, Jiaozuo 454003, Henan, China
2.
College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China

摘要

摘要: 为研究瓦斯煤尘复合爆炸影响因素的耦合规律，对煤粉质量浓度、甲烷体积分数、煤粉粒径、煤粉种类等4种影响因素进行了多因素与单因素实验分析。通过正交实验，将各因素对爆炸的影响进行了定量分析，结果表明，4个因素对最大爆炸压力p_max的影响由强到弱依次为：甲烷体积分数、煤粉质量浓度、煤粉种类、煤粉粒径；对最大爆炸压力上升速率(dp/dt)_max的影响程度由强到弱依次为：甲烷体积分数、煤粉质量浓度、煤粉粒径、煤粉种类。对于体积分数为9%、11%的甲烷，复合体系的p_max随煤粉的质量增加而减小。当煤粉质量浓度增加到100、200 g/m³时，在与体积分数为6%的甲烷耦合作用下，会产生更强的“激励”作用，且煤粉浓度较大时，挥发分低的煤种最佳瓦斯浓度会降低。甲烷体积分数存在临界值，该临界值会改变挥发分因素的影响方式：低于此临界值时，高挥发分煤尘体系的(dp/dt)_max更高，(dp/dt)_max来临时间更短；高于此临界值时，低挥发分体系具有更高的爆炸强度。粒径影响挥发分的作用，粒径越大，挥发分的影响差异越明显。当甲烷体积分数为11%时，挥发分高的煤尘更容易受粒径的影响，直径小的煤尘体系，爆炸系数K_st更小；而低挥发分煤粉在甲烷体积分数接近当量时受粒径影响更明显。
- 瓦斯 /
- 煤尘 /
- 气粉爆炸 /
- 影响因素 /
- 耦合作用
Abstract: In order to reveal the coupling law of the influencing factors in gas/coal dust composite explosion, experiments were conducted in a 20 L spherical explosion device. Multi-factor and single-factor experimental analyses were conducted on four influencing factors according to explosion parameters, including coal concentration, methane volume fraction, coal particle size, and coal type. By conducting orthogonal experiments on the influencing factors, and using the explosion parameters as indicators to carry out range analysis and variance analysis, the influence of each factor on the explosion had been quantified. The experimental results show that the degree of influence of the four factor on p_max are (from strong to weak): methane volume fraction, coal dust mass concentration, coal dust type, and coal dust particle size; the effects on (dp/dt)_max are (from strong to weak): methane volume fraction, coal dust mass concentration, coal dust particle size, and coal dust type. For methane concentrations of 9% and 11%, the value of p_max of the composite system decreases with increasing mass of coal dust. When the mass concentration of coal dust increases to 100 g/m³ and 200 g/m³, coupled with 6% volume fraction of methane, it will produce a stronger “incentive” effect, and when the concentration of coal dust is larger, the low volatility will reduce the optimal gas concentration. The existence of a certain critical value of methane concentration will change the influence mode of volatile factors. Below this value, the value of (dp/dt)_max of the high volatile coal dust system is higher, and its arrival time is shorter, while above this value, the low volatile fraction system has a higher explosion intensity. Particle size implicates the influence of volatile fraction, the larger the particle diameter, the more obvious the difference produced by the volatile fraction factor. At 11% methane concentration, coal dust with high volatile fraction is more susceptible to the effect of particle size, and the smaller diameter coal dust system has smaller K_st value; at methane concentration close to equivalent, low volatile fraction coal dust is more significantly affected by the particle size factor.
- gas /
- coal dust /
- gas/dust explosion /
- influencing factor /
- coupling

HTML全文

图 1 20 L球形爆炸容器装置图

Figure 1. Diagram of a 20 L spherical explosive container device

下载: 全尺寸图片幻灯片

图 2 煤粉粒径分析结果

Figure 2. Results of particle size analysis of coal dust

下载: 全尺寸图片幻灯片

图 3 不同煤粉质量浓度下p_max随甲烷体积分数的变化

Figure 3. Variations of p_max with methane volume fraction at different coal dust concentrations

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图 4 不同甲烷体积分数下，p_max和(dp/dt)_max随煤粉质量浓度的变化

Figure 4. Variations of p_max and (dp/dt)_max with the mass concentration of coal dust at different methane volume fractions

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图 5 瓦斯煤尘爆炸(dp/dt)_max及其来临时刻（煤粉质量浓度60 g/m³）

Figure 5. (dp/dt)_max of methane coal dust explosion and its moment of arrival (coal dust mass concentration: 60 g/m³)

下载: 全尺寸图片幻灯片

图 6 不同粒径煤粉的K_st随甲烷体积分数的变化（煤粉浓度100 g/m³）

Figure 6. Variation of K_st with methane volume fraction for different particle sizes of coal dust (coal dust concentration: 100 g/m³)

下载: 全尺寸图片幻灯片

表 1 煤粉的工业分析

Table 1. Industrial analysis of coal dust

煤样	ω（挥发分）/%	ω（水分）/%	ω（灰分）/%	ω（固定碳）/%
褐煤	38.02	6.68	4.98	54.75
无烟煤	7.97	2.58	10.59	79.91

下载: 导出CSV

表 2 正交实验各因素及水平参数

Table 2. Factors and level parameters of orthogonal experiment

水平	煤粉质量浓度/(g·m⁻³)	甲烷体积分数/%	煤粉粒径/μm	煤粉种类
1	30	6	39	褐煤
2	60	9	123	无烟煤
3	100	11	283	−
4	200	−	−	−

下载: 导出CSV

表 3 正交实验的极差分析结果

Table 3. Results of extreme difference analysis of orthogonal experiments

指标	因变量	煤粉质量浓度/(g·m⁻³)	甲烷体积分数/%	煤粉粒径/μm	煤粉种类
K₁	p_max	6.119	7.752	8.048	12.256
K₁	(dp/dt)_max	238.406	181.905	283.525	446.191
K₂	p_max	6.132	8.489	8.153	12.041
K₂	(dp/dt)_max	228.572	386.572	301.977	437.548
K₃	p_max	6.137	8.056	8.096	—
K₃	(dp/dt)_max	220.595	315.262	298.237	—
K₄	p_max	5.909	—	—	—
K₄	(dp/dt)_max	196.166	—	—	—
k₁	p_max	0.680	0.646	0.671	0.681
k₁	(dp/dt)_max	26.489	15.159	23.627	24.788
k₂	p_max	0.681	0.707	0.679	0.669
k₂	(dp/dt)_max	25.397	32.214	25.165	24.308
k₃	p_max	0.682	0.671	0.675	—
k₃	(dp/dt)_max	24.511	26.272	24.853	—
k₄	p_max	0.657	—	—	—
k₄	(dp/dt)_max	21.796	—	—	—
极差R	p_max	0.025	0.061	0.009	0.012
极差R	(dp/dt)_max	4.693	17.055	1.538	0.480
最佳水平	p_max	100	9	138	褐煤
最佳水平	(dp/dt)_max	30	9	138	褐煤
因素主次	p_max	甲烷体积分数、煤粉质量浓度、煤粉种类、煤粉粒径
因素主次	(dp/dt)_max	甲烷体积分数、煤粉质量浓度、煤粉种类、煤粉粒径

下载: 导出CSV

表 4 正交实验的方差分析结果

Table 4. Results of the variance analysis of orthogonal experiments

试验因素	因变量	平方和	均方	F	影响程度
煤粉质量浓度	p_max	0.005	0.002	1.307	—
煤粉质量浓度	(dp/dt)_max	108.575	36.192	3.597	显著
甲烷体积分数	p_max	0.023	0.012	10.037	高度显著
甲烷体积分数	(dp/dt)_max	1798.827	899.414	89.378	高度显著
煤粉粒径	p_max	0.001	0.001	0.201	—
煤粉粒径	(dp/dt)_max	15.859	7.930	0.788	—
煤粉种类	p_max	0.001	0.001	1.094	—
煤粉种类	(dp/dt)_max	2.075	2.075	0.206	—
随机误差E	p_max	0.031	0.001	—	—
随机误差E	(dp/dt)_max	271.694	10.063	—	—

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