基于正交试验的U形通风采煤工作面瓦斯爆炸超压影响因素分析

刘佳佳 张翔 高志扬 张扬 陈玖强 靳马超

刘佳佳, 张翔, 高志扬, 张扬, 陈玖强, 靳马超. 基于正交试验的U形通风采煤工作面瓦斯爆炸超压影响因素分析[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0142
引用本文: 刘佳佳, 张翔, 高志扬, 张扬, 陈玖强, 靳马超. 基于正交试验的U形通风采煤工作面瓦斯爆炸超压影响因素分析[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0142
LIU Jiajia, ZHANG Xiang, GAO Zhiyang, ZHANG Yang, CHEN Jiuqiang, JIN Machao. Analysis on influencing factors of gas explosion overpressure peak in a U-shaped ventilation coal face based on orthogonal test[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0142
Citation: LIU Jiajia, ZHANG Xiang, GAO Zhiyang, ZHANG Yang, CHEN Jiuqiang, JIN Machao. Analysis on influencing factors of gas explosion overpressure peak in a U-shaped ventilation coal face based on orthogonal test[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0142

基于正交试验的U形通风采煤工作面瓦斯爆炸超压影响因素分析

doi: 10.11883/bzycj-2024-0142
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);中国博士后科学基金(2024M750803);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);河南理工大学青年骨干教师培养计划(2023XQG-07)
详细信息
    作者简介:

    刘佳佳(1985- ),男,博士,副教授,liujiajia@hpu.edu.cn

    通讯作者:

    高志扬(1981- ),男,博士,副教授,aa19851985@sina.com

  • 中图分类号: O382

Analysis on influencing factors of gas explosion overpressure peak in a U-shaped ventilation coal face based on orthogonal test

  • 摘要: 为探究U形通风采煤工作面瓦斯爆炸的传播规律并探讨瓦斯爆炸超压衰减对不同影响因素的敏感性,利用Fluent模拟软件并结合某矿3906工作面情况开展了数值模拟研究。首先,根据瓦斯爆炸机理搭建数学模型,并依据前人实验方案进行数值模拟,以此验证该数学模型的可靠性;其次,依序进行模拟关键参数的优化,并得到关键参数网格尺寸、迭代步长和点火温度的最合理设置分别为0.2 m、0.05 ms和1900 K,通过拟合得到工作面爆炸超压峰值及其到达时间与爆心距之间的函数关系。通过正交试验分析瓦斯爆炸超压衰减对不同影响因素的敏感性。极差分析得到温度、瓦斯浓度和瓦斯积聚区压力3个主控因素的极差值依次减小,此次模拟中温度对于爆炸超压衰减的影响最显著,其中R值达到5.928;运用方差分析对影响瓦斯爆炸超压衰减率的主控因素进行显著性研究,温度的方差值最大,瓦斯积聚区压力的方差值次之,瓦斯浓度的方差值最小,其中温度的显著值F达到31.835,其余两项不显著。
  • 图  1  河南焦煤集团某矿3906工作面物理模型

    Figure  1.  Physical model of working face 3906 of a mine of Henan Coking Coal Group

    图  2  数学模型验证中监测点的布置

    Figure  2.  Layout of monitoring points for validating the mathematical model

    图  3  不同方法得到的不同测点处的超压峰值以及两者的误差

    Figure  3.  Overpressure peaks of different measuring points obtained by different methods and their corresponding errors

    图  4  关键参数优化中监测点的布置

    Figure  4.  Layout of monitoring points for optimizing the key parameters

    图  5  超压峰值随网格尺寸的变化

    Figure  5.  Variation of overpressure peak with mesh size

    图  6  超压峰值到达时间随网格尺寸的变化

    Figure  6.  Variation of overpressure peak arrival time with mesh

    图  7  超压峰值随迭代步长的变化

    Figure  7.  Variation of overpressure peak with time step

    图  8  超压峰值到达时间随迭代步长的变化

    Figure  8.  Variation of overpressure peak arrival time with time step

    图  9  超压峰值随点火温度的变化

    Figure  9.  Variation of overpressure peak with ignition temperature

    图  10  超压峰值到达时间随点火温度的变化

    Figure  10.  Variation of overpressure peak arrival time with ignition temperature

    图  11  U形通风采煤工作面监测点的布置

    Figure  11.  Layout of monitoring points in U-shaped ventilation coal face

    图  12  工作面瓦斯爆炸传播规律

    Figure  12.  Propagation of gas explosion in working face

    图  13  不同瓦斯浓度水平下瓦斯爆炸超压峰值的衰减

    Figure  13.  Attenuation of gas explosion overpressure peak under different gas concentration levels

    表  1  网格分布

    Table  1.   Grid distribution

    网格尺寸/m瓦斯充填区网格数点火区域网格数
    0.1516284154
    0.20720056
    0.25358432
    0.30214818
    0.35131014
    0.4090012
    0.456486
    下载: 导出CSV

    表  2  监测点的分布

    Table  2.   Distribution of monitoring points

    监测点设置范围监测点数量监测点间距/m
    120 m≤Y≤125 m25
    90 m≤Y<120 m152
    30 m≤Y<90 m125
    4 m<Y<30 m132
    下载: 导出CSV

    表  3  同等间距下爆炸超压的衰减情况

    Table  3.   Explosion overpressure attenuation at the same spacing

    爆心距区间/m 超压衰减/kPa 时间间隔/ms 超压衰减率/% 爆心距区间/m 超压衰减/kPa 时间间隔/ms 超压衰减率/%
    8~18 248.95 13.3 49 68~78 11.32 21.05 9.9
    18~28 58.417 17.25 22.6 78~88 5.234 21.4 5.1
    28~38 29.993 18.15 14.9 88~98 5.491 21.65 5.7
    38~48 26.713 19.25 15.6 98~108 6.516 22 7.1
    48~58 13.329 19.9 9.3 108~118 4.887 22.3 5.8
    58~68 17.308 20.45 13.3
    下载: 导出CSV

    表  4  瓦斯爆炸超压传播影响因素的水平设置

    Table  4.   Level setting of influencing factors of gas explosion overpressure propagation

    水平温度/K瓦斯积聚区压力/MPa瓦斯浓度/%
    13000.27.5
    23500.49.5
    34000.611.5
    44500.813.5
    下载: 导出CSV

    表  5  瓦斯爆炸超压传播影响因素的正交试验方案

    Table  5.   Orthogonal test scheme of influencing factors of gas explosion overpressure propagation

    组别 温度/K 瓦斯积聚区压力/MPa 瓦斯浓度/% 组别 温度/K 瓦斯积聚区压力/MPa 瓦斯浓度/%
    1 350 0.4 13.5 9 400 0.8 13.5
    2 350 0.2 9.5 10 300 0.4 11.5
    3 450 0.2 13.5 11 450 0.4 9.5
    4 400 0.4 7.5 12 450 0.8 11.5
    5 400 0.2 11.5 13 350 0.8 7.5
    6 300 0.6 13.5 14 400 0.6 9.5
    7 300 0.2 7.5 15 450 0.6 7.5
    8 300 0.8 9.5 16 350 0.6 11.5
    下载: 导出CSV

    表  6  不同影响因素对瓦斯爆炸超压衰减率的影响

    Table  6.   Influence of different influencing factors on attenuation rate of gas explosion overpressure

    组别 影响因素 爆炸超压
    衰减率/%
    组别 影响因素 爆炸超压
    衰减率/%
    瓦斯浓度/% 温度/K 瓦斯积聚区压力/MPa 瓦斯浓度/% 温度/K 瓦斯积聚区压力/MPa
    1 7.5 400 0.4 87.671 9 11.5 400 0.2 84.191
    2 7.5 300 0.2 81.582 10 11.5 300 0.4 80.533
    3 7.5 350 0.8 82.149 11 11.5 450 0.8 85.951
    4 7.5 450 0.6 85.985 12 11.5 350 0.6 81.035
    5 9.5 350 0.2 82.298 13 13.5 350 0.4 81.336
    6 9.5 300 0.8 79.163 14 13.5 450 0.2 86.373
    7 9.5 450 0.4 86.935 15 13.5 300 0.6 80.255
    8 9.5 400 0.6 82.851 16 13.5 400 0.8 83.019
    下载: 导出CSV

    表  7  极差分析

    Table  7.   Range analysis

    水平 瓦斯浓度/%(A) 温度/K(B) 瓦斯积聚区压力/MPa(C)
    K 1 337.387 321.533 334.444
    2 331.247 326.818 336.475
    3 331.710 337.732 330.126
    4 330.983 345.244 330.282
    $ {K_{ij}} $ 1 84.346 80.383 83.611
    2 82.812 81.705 84.119
    3 82.928 84.433 82.532
    4 82.746 86.311 82.571
    最佳水平 1 4 2
    Ri 1.6 5.928 1.587
     注:K值指的是i水平j因素下4组试验结果瓦斯爆炸超压衰减率之和,$ {K_{ij}} $对应的K的平均值,i = 1,2,3,4,j = 1,2,3; $ {R_i} = $$ \max \{ {K_{i1}}, {K_{i2}},{K_{i3}}\} - \min \{ {K_{i1}},{K_{i2}},{K_{i3}}\} $, i = 1,2,3,4,R值为某一因素下不同水平之间的极差,即最大值减去最小值,其中R值越大,表明该因素水平的改变对爆炸超压衰减的影响越大。
    下载: 导出CSV

    表  8  试验方案及数据分析

    Table  8.   Test scheme and data analysis

    指标 方差来源
    瓦斯浓度/% 温度/K 瓦斯积聚区压力/MPa
    $ K_{1j}^2 $ 113829.988 103383.47 111852.789
    $ K_{2j}^2 $ 109724.575 106810.005 113215.426
    $ K_{3j}^2 $ 110031.524 114062.904 108983.176
    $ K_{4j}^2 $ 109549.746 119193.42 109086.2
    $ {S_i} $ 6.98 85.476 7.424
    $ {S_{\text{T}}} $ 105.249
    $ {S_{\text{e}}} $ 5.369
    下载: 导出CSV

    表  9  瓦斯爆炸超压衰减率主控因素方差分析

    Table  9.   Variance analysis of the main controlling factors of gas explosion overpressure decay ratio

    主控因素 偏差平方和 自由度 平均偏差平方和 F Fa 显著性
    瓦斯浓度 6.98 3 2.327 2.6 4.76
    温度 85.476 3 28.492 31.835 4.76 ***
    瓦斯积聚区压力 7.424 3 2.475 2.765 4.76
    误差e 5.369 6 0.895
     注:$ {F_{0.01}}(3,6) = 9.78 $,$ {F_{0.05}}(3,6) = 4.76 $, $ {F_{0.1}}(3,6) = 3.29 $;若F > $ {F_{0.01}} $,认为显著性高,用***表示;若$ {F_{0.01}} $> F > $ {F_{0.05}} $,认为显著性中等,用**表示;若$ {F_{0.05}} $> F > $ {F_{0.1}} $,认为显著性低,用*表示;若$ {F_{0.1}} $> F,则该因素无显著性。
    下载: 导出CSV
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  • 收稿日期:  2024-05-15
  • 修回日期:  2024-07-09
  • 网络出版日期:  2024-07-11

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