| 掘进工作面局部通风参数对瓦斯分布影响研究 |
| 投稿时间：2020-09-16 修订日期：2022-01-16 点此下载全文 |
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| 基金项目:国家重点研发计划(2018YFC0808100) |
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| 中文摘要:为了研究矿井掘进工作面瓦斯异常涌出时局部通风参数对于瓦斯分布的影响，利用Fluent软件，建立了巷道三维模型，分析不同通风参数时掘进巷道瓦斯分布情况。研究结果表明：初期瓦斯积聚在巷道底部，在风流和浮力作用下瓦斯向出口和上方运移，风流稳定后，瓦斯积聚在掘进迎头附近下部，后方瓦斯分布较为均匀；风筒布置位置对于回风流瓦斯浓度影响较小，对于掘进迎头附近瓦斯分布影响较大； 2个风筒均布置在巷道侧边上部，且风量较大风筒布置在风量较小风筒上方时，通风效果较好。通过对唐山某矿掘进工作面瓦斯和风量实测数据分析，得出该掘进工作面瓦斯涌出量小于1.13m3/min时，可依靠现有装备进行局部通风；大于1.13m3/min时，应更换较大风量局扇或采取瓦斯抽采等手段，确保矿井通风安全。 |
| 中文关键词:掘进工作面 瓦斯分布 瓦斯涌出 通风参数 数值模拟 |
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| Study on influence of local ventilation parameters on gas distribution in heading face |
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| Abstract:In order to study the influence of local ventilation parameters on gas distribution in abnormal gas gushing in the mine heading face. Through Fluent software, 3d model of roadway was established. The gas distribution in tunneling roadway under different ventilation parameters is analyzed. The research results show that: The initial gas accumulated at the bottom of the roadway.Under the action of wind and buoyancy, the gas moves towards the outlet and above. After the air flow stabilizes, the gas accumulates in the lower part near the heading face, and the gas distribution in the rear is more uniform. The air duct layout has less influence on gas concentration in the return air flow and more influence on gas distribution near the heading face.The two air ducts are arranged on the upper side of the side of the tunnel, and the ventilation effect is better when the air duct with a large air volume is arranged on the top of the air duct with a small air volume.Through the analysis of the measured data of gas and air volume on the heading face of a mine in Tangshan.When the gas emission of the heading face is less than 1.13m3/min, local ventilation can be carried out by relying on existing equipment.When it is greater than 1.13m3/min, the local fan with larger air volume should be replaced or the means such as gas extraction should be adopted to ensure mine ventilation safety. |
| keywords:driving face gas distribution gas emission ventilation parameters numerical simulation |
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