并联下行通风巷道瓦斯风压诱致风流紊乱研究

王凯; 吴则琪; 周爱桃; 丰硕

并联下行通风巷道瓦斯风压诱致风流紊乱研究

王凯^1,2,
吴则琪^1,2,
周爱桃^1,2,
丰硕^1,2

1.
中国矿业大学(北京)资源与安全工程学院,北京100083;
2.
煤炭资源与安全开采国家重点实验室,北京100083

基金项目: 国家重点研发计划(2016YFC0801402，2016YFC0600708);国家自然科学基金(51474219)

详细信息

作者简介:
王凯(1972—），男，河南遂平人，教授，博士生导师，主要从事安全工程技术、矿业灾害防治方面的研究。

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出版历程
- 收稿日期: 2016-06-20
- 刊出日期: 2016-08-30

Study on gas flow pressure caused airflow disorder in parallel downward ventilated roadways

Wang Kai^1,2,
Wu Zeqi^1,2,
Zhou Aitao^1,2,
Feng Shuo^1,2

1.
College of Resources and Safety Engineering,China University of Mining and Technology,Beijing 100083,China;
2.
State Key Laboratory of Coal Resources and Safe Mining,Beijing 100083,China

摘要

摘要: 高浓度瓦斯在倾斜巷道中积聚会形成瓦斯风压，瓦斯风压会导致积聚瓦斯的巷道及其旁侧分支巷道风流紊乱。通过搭建并联下行通风巷道相似实验平台，并进行一系列实验，研究了瓦斯风压诱致井巷风流紊乱的规律。每组实验中，均首先将倾斜巷道充满100%的瓦斯，并保持它的旁侧巷道瓦斯浓度为0%；然后调节倾斜巷道或其旁侧巷道的风阻，使其不同于其他组实验。实验结果表明：瓦斯风压会造成并联下行通风系统中风流的复杂变化，使并联巷道中的瓦斯随风流往复运动。利用振动理论对依据实验条件简化的模型列出了振动方程，解释了巷道风阻对风流振动阻尼力的影响作用，得出了并联系统中增大任一分支风阻都有助于减弱风流振动的结论。对实验中瓦斯运移规律进行分析可知：某条分支巷道风阻的增大有助于保持其并联分支的风流稳定，但不利于本分支瓦斯的顺利排出。因此，在现场实际中，当下行风巷道出现瓦斯积聚时，应及时增大其旁侧分支风阻，以保持该并联系统风流稳定，从而使积聚瓦斯能够尽快排出。
- 下行通风 /
- 并联巷道 /
- 瓦斯风压 /
- 风流紊乱 /
- 风阻
Abstract: The high-concentration of methane accumulating in a tilted roadway could produce gas flow pressure.This gas flow pressure can induce airflow disorder in the tilted roadway and its lateral roadways.In this paper,an experimental system was constructed for representing parallel downward ventilation roadways.With this system,a series of experiments were conducted to study the gas flow pressureinduced airflow disorder in coal mine roadways.The tilted roadway was saturated with 100% concentration methane while the lateral roadway was saturated with air for all experiments.The resistance coefficient of the tilted roadway and the lateral roadway were changed in different experiments.The experimental results indicate that the gas flow pressure could cause complex airflow changes in parallel downward ventilation roadways and lead to methane and airflow reciprocation in the roadways.A vibration model was developed based on a simplification of the experimental system.The vibration model can explain the effects of windage on the damping force of the vibration.Both the experiment and model results indicate that the windage increase of the tilted roadway or the lateral roadway can weaken the airflow vibration.Analysis of the methane movement in the experimental system indicates that for the tilted roadway and the lateral roadway an windage increase in one roadway is helpful for the airflow stability but harmful for its own gas discharge.If gas accumulation appears in an in situ downward ventilation roadway,the windage of the lateral roadway should be increased without delay to keep the system airflow stable and to discharge the accumulated methane as soon as possible.
- downward ventilation /
- parallel roadways /
- gas flow pressure /
- airflow disorder /
- windage

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参考文献(42)

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并联下行通风巷道瓦斯风压诱致风流紊乱研究

作者简介:
王凯(1972—），男，河南遂平人，教授，博士生导师，主要从事安全工程技术、矿业灾害防治方面的研究。

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Study on gas flow pressure caused airflow disorder in parallel downward ventilated roadways

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留言板

并联下行通风巷道瓦斯风压诱致风流紊乱研究

作者简介: 王凯(1972—），男，河南遂平人，教授，博士生导师，主要从事安全工程技术、矿业灾害防治方面的研究。

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出版历程

Study on gas flow pressure caused airflow disorder in parallel downward ventilated roadways

计量

出版历程

目录

作者简介:
王凯(1972—），男，河南遂平人，教授，博士生导师，主要从事安全工程技术、矿业灾害防治方面的研究。