Y型通风采煤工作面瓦斯爆炸传播规律模拟研究

刘佳佳; 张扬; 张翔; 聂子硕

doi:10.11883/bzycj-2023-0018

Y型通风采煤工作面瓦斯爆炸传播规律模拟研究

doi: 10.11883/bzycj-2023-0018

刘佳佳^{1, 2, 3, 4,},
张扬¹,
张翔¹,
聂子硕¹

1.
河南理工大学安全科学与工程学院，河南焦作 454003
2.
安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室，安徽淮南 232001
3.
河南理工大学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
4.
河南理工大学瓦斯地质与瓦斯治理国家重点实验室培育基地，河南焦作 454003

基金项目: 国家自然科学基金（52074106）；河南省优秀青年科学基金（232300421061）；河南理工大学创新型科研团队项目（T2023-3）；深部煤矿采动响应与灾害防控国家重点实验室开放基金（SKLMRDPC22KF11）

详细信息

作者简介:
刘佳佳（1985－　），男，博士，副教授，博士生导师，liujiajia@hpu.edu.cn

中图分类号: O382
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- 文章访问数: 320
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- PDF下载量: 54
- 被引次数: 0
出版历程
- 收稿日期: 2023-01-16
- 修回日期: 2023-04-06
- 网络出版日期: 2023-04-25
- 刊出日期: 2023-08-31

Simulation study on propagation characteristics of gas explosion in Y-shaped ventilated coal face

LIU Jiajia^{1, 2, 3, 4
,},
ZHANG Yang¹,
ZHANG Xiang¹,
NIE Zishuo¹

1.
College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
2.
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China
3.
State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization, Henan Polytechnic University, Jiaozuo 454003, Henan, China
4.
State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, Henan, China

摘要

摘要: 针对Y型通风采煤工作面的瓦斯爆炸传播规律，利用Fluent模拟软件，结合余吾煤矿N2105工作面实际情况开展了数值模拟研究。结果表明：模拟结果与前人的实验结果之间的最大相对误差为11.3%，最小相对误差仅为1.7%，验证了数学模型的可靠性；确定了瓦斯爆炸数值模拟最合理的关键参数网格尺寸、迭代步长和点火温度分别为0.4 m、0.10 ms和1 800 K；进风顺槽、胶带顺槽、回风巷道和工作面的瓦斯爆炸超压峰值与爆源之间的距离符合指数函数关系，到达超压峰值所需时间与爆源之间的距离符合线性函数关系；距巷道分叉口7.5 m处，工作面超压衰减率为41.03%，胶带顺槽超压衰减率为25.99%，发生爆炸时胶带顺槽内更危险；工作面分叉处湍流区由右侧逐渐向左侧移动，且巷道分叉处超压峰值会增大；回风巷道火焰消散时间最短，胶带顺槽火焰消散时间次之，工作面火焰消散时间最长；胶带顺槽和回风巷道火焰消散方向与瓦斯爆炸初期火焰传播方向相反，工作面火焰消散方向与瓦斯爆炸初期火焰传播方向一致。
- Y型通风 /
- 采煤工作面 /
- 瓦斯爆炸 /
- 超压峰值 /
- 火焰传播
Abstract: To study the propagation law of gas explosion in a Y-shaped ventilated coal face, the simulation software of Fluent was used to carry out numerical simulation research combined with the actual situation of the N2105 working face in the Yuwu Coal Mine. Firstly, the reliability of the mathematical model in this paper was demonstrated. In addition, the simulation parameters were optimized to make the results fit the actual situation. Finally, a numerical simulation was carried out. The results show that the maximum error between the simulation results and the previous experimental results is 11.3%, and the minimum error is only 1.7%, which verifies the reliability of the mathematical model in this paper. The most reasonable key parameters for the numerical simulation of gas explosion were determined including mesh size, iteration step size and ignition temperature, which are 0.4 m, 0.10 ms and 1 800 K, respectively. The overpressure peak of the gas explosion in the air inlet channel, belt fluting, return airway, and working face and its distance from the explosion source accords with an exponential function, and the relationship between the time required to reach the overpressure peak and the distance from the explosion source is linear. The overpressure attenuation ratio of the working face is 41.03% at 7.5 m away from the tunnel bifurcation, and the overpressure attenuation ratio of the belt fluting is 25.99%. Belt fluting is more dangerous in the event of a gas explosion. In the bifurcation of the working face, the turbulent flow zone gradually moves from the right side to the left side, and the overpressure peak at the bifurcation of the roadway increases. The flame dissipation of the return airway is the fastest, followed by the flame dissipation of the belt fluting, and the flame dissipation of the working face is the slowest. The direction of the flame dissipation in the belt fluting and return airway is opposite to the direction of the flame propagation in the early stage of the gas explosion, while the direction of the flame dissipation in the working face is consistent with the direction of the flame propagation in the early stage of the gas explosion.
- Y-shaped ventilation /
- coal face /
- gas explosion /
- overpressure peak /
- flame propagation

HTML全文

图 1 余吾煤矿N2105工作面的三维物理模型

Figure 1. A 3D physical model of N2105 working face in Yuwu Coal Mine

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图 2 模拟管道示意图

Figure 2. Schematic diagram of simulated pipeline

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图 3 参数优化监测点示意图

Figure 3. Parameter optimization monitoring points

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图 4 超压峰值随网格尺寸的变化

Figure 4. Variations of overpressure peak with mesh size

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图 5 超压峰值到达时间随网格尺寸的变化

Figure 5. Variations of overpressure peak arrival time with mesh size

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图 6 超压峰值随迭代步长的变化

Figure 6. Variation of overpressure peak with time step

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图 7 超压峰值到达时间随迭代步长的变化

Figure 7. Variation of overpressure peak arrival time with time step

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图 8 超压峰值随点火温度的变化

Figure 8. Variation of overpressure peak with ignition temperature

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图 9 超压峰值到达时间随点火温度的变化

Figure 9. Variation of overpressure peak arrival time with ignition temperature

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图 10 瓦斯爆炸超压传播云图

Figure 10. Contours of gas explosion overpressure propagation

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图 11 回风巷道瓦斯爆炸传播规律

Figure 11. Gas explosion propagation law in return airway

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图 12 胶带顺槽瓦斯爆炸传播规律

Figure 12. Gas explosion propagation law along belt fluting

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图 13 工作面瓦斯爆炸传播规律

Figure 13. Gas explosion propagation law of working face

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图 14 进风顺槽瓦斯爆炸传播规律

Figure 14. Gas explosion propagation law in the inlet channel

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图 15 爆炸超压峰值对比

Figure 15. Comparison of gas explosion overpressure peaks

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图 16 爆炸超压峰值到达时间对比

Figure 16. Comparison of overpressure peak arrival time of gas explosion

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图 17 瓦斯爆炸超压矢量图

Figure 17. Vector diagrams of gas explosion overpressure

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图 18 火焰的温度云图

Figure 18. Contours of flame temperature variation

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表 1 爆炸超压模拟结果与实验结果的对比

Table 1. Comparison between simulation and experimental results of explosion overpressure

爆心距/m	爆炸超压/kPa		相对误差/%
爆心距/m	实验	模拟	相对误差/%
2.0	181.850	193.915	6.6
2.5	178.860	175.819	–1.7
3.0	167.663	156.085	–6.9
3.5	159.170	141.142	–11.3
4.0	139.672	129.495	–7.3
4.5	120.682	117.704	–2.4

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表 2 网格分布

Table 2. Grid distribution

网格尺寸/m	网格节点数	网格数	平均网格质量
0.8	24 402	17 535	0.985
0.6	48 188	36 834	0.996
0.5	77 528	61 600	1.000
0.4	154 280	128 817	0.999
0.2	1 087 294	990 000	0.999

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