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综掘工作面气室降尘技术研究

张京兆 苏慧冬 闫振国 马文杰 熊帅 张宸毓

张京兆,苏慧冬,闫振国,等. 综掘工作面气室降尘技术研究[J]. 工矿自动化,2024,50(1):80-87.  doi: 10.13272/j.issn.1671-251x.2023060062
引用本文: 张京兆,苏慧冬,闫振国,等. 综掘工作面气室降尘技术研究[J]. 工矿自动化,2024,50(1):80-87.  doi: 10.13272/j.issn.1671-251x.2023060062
ZHANG Jingzhao, SU Huidong, YAN Zhenguo, et al. Research on dust reduction technology of air chamber in fully mechanized mining face[J]. Journal of Mine Automation,2024,50(1):80-87.  doi: 10.13272/j.issn.1671-251x.2023060062
Citation: ZHANG Jingzhao, SU Huidong, YAN Zhenguo, et al. Research on dust reduction technology of air chamber in fully mechanized mining face[J]. Journal of Mine Automation,2024,50(1):80-87.  doi: 10.13272/j.issn.1671-251x.2023060062

综掘工作面气室降尘技术研究

doi: 10.13272/j.issn.1671-251x.2023060062
基金项目: 国家自然科学基金资助项目(51974232)。
详细信息
    作者简介:

    张京兆(1976—),男,河南渑池人,副教授,主要从事矿井通风与粉尘防治方面的教学与研究工作,E-mail:1009282107@qq.com

    通讯作者:

    苏慧冬(1999—),男,陕西府谷人,硕士研究生,研究方向为矿井通风技术,E-mail:1599625948@qq.com

  • 中图分类号: TD714.4

Research on dust reduction technology of air chamber in fully mechanized mining face

  • 摘要: 针对掘进巷道中的粉尘控制问题,传统的长压短抽通风降尘技术存在粉尘扩散区域大、风幕降尘技术存在射流孔易堵塞等弊端。以巴拉素煤矿综掘工作面为工程研究背景,建立了掘进作业过程中的粉尘运动数学模型,得出降低综掘工作面粉尘浓度的关键因素是控制掘进巷道风流场扰动范围及减小粉尘颗粒运动时间。以上述关键因素为依据,在风幕降尘的基础上开发了气室降尘技术,通过在正压风筒末端加装风袖,与风幕共同作用将粉尘封闭在气室区域内,再由负压风机抽出,以提高降尘效率。采用Fluent软件对长压短抽通风降尘、风幕降尘和气室降尘进行模拟对比分析,并优化了气室降尘技术参数。模拟结果表明:采用气室降尘技术时,综掘工作面人体呼吸带位置的粉尘浓度为350 mg/m3,较采用长压短抽通风降尘时的600 mg/m3和风幕降尘时的480 mg/m3大幅降低;气室降尘最优技术参数为正压风筒出风口距综掘工作面14 m、负压风筒末端直径0.6 m。在巴拉素煤矿2号煤2号回风大巷综掘工作面进行现场试验,结果表明采用气室降尘时,掘进巷道最低粉尘浓度为118 mg/m3,低于采用长压短抽通风降尘时的184 mg/m3和风幕降尘时的156 mg/m3,且降尘效率较长压短抽通风降尘平均提高54.8%。

     

  • 图  1  气室降尘技术原理

    Figure  1.  Principle of air chamber dust reduction technology

    图  2  综掘工作面几何模型网格划分

    Figure  2.  Grid division of geometry model of fully mechanized mining face

    图  3  采用长压短抽通风降尘时综掘工作面粉尘浓度分布

    Figure  3.  Dust concentration distribution in fully mechanized mining face under longpressure and short suction ventilation for dust reduction

    图  4  采用风幕降尘时综掘工作面粉尘浓度分布

    Figure  4.  Dust concentration distribution in fully mechanized mining face under air curtain dust reduction

    图  5  采用气室降尘时综掘工作面粉尘浓度分布

    Figure  5.  Dust concentration distribution in fully mechanized mining face under air chamber dust reduction

    图  6  正压风筒出风口距综掘工作面不同距离时粉尘浓度分布

    Figure  6.  Dust concentration distribution under different distances of positive pressure air duct away from fully mechanized mining face

    图  7  不同负压风筒末端直径下综掘工作面粉尘浓度分布

    Figure  7.  Dust concentration distribution in fully mechanized mining face under different end diameter of negative pressure duct

    图  8  测点位置

    Figure  8.  Positions of measuring points

    图  9  不同降尘方式下综掘工作面粉尘浓度测量结果

    Figure  9.  Measured results of dust concentration distribution in fully mechanized mining face under different dust reduction methods

    图  10  不同降尘方式的降尘效率曲线

    Figure  10.  Dust reduction efficiency of different dust reduction methods

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  • 收稿日期:  2023-06-20
  • 修回日期:  2024-01-15
  • 网络出版日期:  2024-01-31

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