|本期目录/Table of Contents|

[1]邓森,李希建,刘柱,等.基于防突风门直角-分支巷道冲击气流传播特征研究*[J].中国安全生产科学技术,2022,18(12):67-72.[doi:10.11731/j.issn.1673-193x.2022.12.009]
　DENG Sen,LI Xijian,LIU Zhu,et al.Research on propagation characteristics of impact airflow in right angle-branch roadway based on anti-outburst air door[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(12):67-72.[doi:10.11731/j.issn.1673-193x.2022.12.009]
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基于防突风门直角-分支巷道冲击气流传播特征研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年12期
页码:
67-72
栏目:
职业安全卫生管理与技术
出版日期:
2022-12-31

文章信息/Info

Title:
Research on propagation characteristics of impact airflow in right angle-branch roadway based on anti-outburst air door
文章编号:
1673-193X(2022)-12-0067-06
作者:
邓森; 李希建 ; 刘柱 ; 胡贝 ; 代芳瑞
(1.贵州大学 矿业学院，贵州 贵阳 550025；
2.复杂地质矿山开采安全技术工程中心，贵州 贵阳 550025；
3.贵州大学 瓦斯灾害防治与煤层气开发研究所，贵州 贵阳 550025）
Author(s):
DENG Sen;  LI Xijian;  LIU Zhu;  HU Bei;  DAI Fangrui
(1.Mining College,Guizhou University,Guiyang Guizhou 550025,China;
2.Engineering Center for Safe Mining Technology under Complex Geologic Condition,Guiyang Guizhou 550025,China;
3.Institute of Gas Disaster Prevention and Coalbed Methane Development of Guizhou University,Guiyang Guizhou 550025,China)
关键词:
煤与瓦斯突出; 冲击气流; 风门; 数值模拟; 传播特征
Keywords:
coal and gas outburst;  impact airflow;  air door;  numerical simulation;  propagation characteristics
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2022.12.009
文献标志码:
A
摘要:
为研究防突风门未破坏下直角-分支巷道中瓦斯突出冲击气流传播特征，建立相似几何模型，采用数值模拟方法计算突出腔体压力在7.5×105 Pa情况下流场中冲击气流压力和速度的变化，分析冲击气流传播随时间的变化过程。研究结果表明：在分叉口-风门段，正向冲击压力与风门反射压力相交产生瓦斯超压现象；在突出口-分叉口段，正向冲击压力与风门反射压力相互冲击，有效降低突出口冲击气流的瞬时强度；在分叉口处，正向冲击气流首先产生绕射并形成单向涡旋，风门反射气流产生的绕射与单向涡旋方向相反，涡旋强度降低。
Abstract:
In order to study the propagation characteristics of gas outburst impact airflow in the right angle-branch roadway with the undamaged anti-outburst air door,a similar geometric model was established,and the numerical simulation method was used to calculate the pressure and velocity change in the flow field under the condition of outburst cavity pressure as 7.4×1.013×105 Pa.The change process of impact airflow propagation over time was analyzed.The results showed that in the bifurcation-air door section,the forward impact pressure intersected with the reflected pressure of air door to produce the gas overpressure.In the outburst opening-bifurcation section,the forward impact pressure and the reflected pressure of air door impacted each other,which effectively reduced the instantaneous intensity of the impact airflow at the outburst opening.At the bifurcation,the forward impact airflow firstly diffracted and formed a one-way vortex,while the diffraction generated by the reflected airflow of air door was opposite to the one-way vortex,and the vortex strength reduced.

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备注/Memo

备注/Memo:
收稿日期： 2021-08-26
* 基金项目： 国家自然科学基金项目（52164015）；贵州省科技计划项目（黔科合支撑〔2022〕一般231）
作者简介： 邓森，硕士研究生，主要研究方向为矿山安全与灾害防治、矿井通风网络优化。
通信作者： 李希建，博士，教授，主要研究方向为矿井瓦斯防治、矿井通风。
更新日期/Last Update: 2023-01-16