Mechanism analysis of bringing upper-corner's gas-accumulating under control in the 'U' working face by pulsed ventilation

机译：通过脉冲通风控制“ U”形工作面上-角瓦斯聚集的机理分析

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Aimed at the problem of upper corner's gas accumulation in the "U" working face that is put forward by the working field, the paper has raised the pulse ventilation method that bringing upper-corner's gas-accumulating under control, and detailedly analyzed the methane diffusion and mass-transmission mechanism which the pulsed ventilation method disperses the gas accumulating in the vortex flow field of the upper-corner of working face and climinates the uneven distribution of gas concentration in main flow f upper corner. It is tested by the field experiment that the pulsed ventilation emthod is effective and feaible.

机译：针对作业现场提出的“ U”形工作面上角积气问题，提出了控制顶角积气的脉冲通风方法，并对甲烷扩散进行了详细的分析。脉冲通风法使工作面上部角的涡流场中积聚的气体扩散，并消除了上角部主流中的气体浓度分布不均的传质机理。现场实验表明，脉冲通风法是有效可行的。

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《International symposium on progress in safety science and technology;2000 ISSST》|2000年|p.828-833|共6页
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Yang Shengqiang; Yu Qixiang; Wang Kai; Zhang Rengui;
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中图分类一般工业技术;
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8. Mechanisms That Control the Geometry of Pulsed Nd:YAG Laser Welds. [R] . Jellison, J. L., Russo, A. J., Peebles, H. C., 1988

机译：控制脉冲Nd：YaG激光焊接几何的机制。

Mechanism analysis of bringing upper-corner's gas-accumulating under control in the 'U' working face by pulsed ventilation

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