复杂矿井通风系统稳定性研究
发布时间：2018-09-03 08:40
【摘要】：国内外学者对通风系统稳定性进行了大量研究，但对影响通风系统稳定性的诸多因素定性多、定量少。基于此，本文从影响通风系统稳定的风网结构、主通风机及外界因素三个主要方面进行逐层分析，建立了通风系统稳定性数学模型。根据网络解算结果分析提出了空气幕控风的方法，，通过Fluent模拟及城郊矿现场实验得到了单、双机幕安装角与阻风性能的关系，为角联巷道风流控制提供了新的方法。通过对罐笼、矿车在不同运行状态下对系统冲击的现场实测及计算机模拟，得出罐笼提升对系统无影响，矿车逆风运行对系统有一定影响，但远不如大气压及自然风压变化对系统影响大的结论。最后通过对不同类型风机的数值模拟及噪声频谱分析，证实了风机具有特定的噪声特征频谱段，通过对风机噪声特征频谱对比分析可以为通风机性能变化的早期诊断提供依据。
[Abstract]:Scholars at home and abroad have done a lot of research on the stability of ventilation system, but many factors affecting the stability of ventilation system are more qualitative and less quantitative. Based on this, this paper analyzes the ventilation system stability from three main aspects: the ventilation network structure, the main ventilator and the external factors, and establishes the mathematical model of the ventilation system stability. Based on the analysis of the results of the network calculation, the air curtain control method is put forward, and the relationship between the angle of installation of single and double screens and the wind resistance performance is obtained through Fluent simulation and field experiments in suburban mines, which provides a new method for wind flow control in angular roadway. Through the field measurement and computer simulation of the impact of cage and mining car on the system under different operating conditions, it is concluded that the cage hoisting has no effect on the system, and the headwind operation of the mine car has certain influence on the system. However, the conclusion that atmospheric pressure and natural wind pressure change have great influence on the system is not as good as that of atmospheric pressure and natural wind pressure. Finally, through numerical simulation and noise spectrum analysis of different types of fans, it is proved that the fan has a specific noise characteristic spectrum, and the contrast analysis of fan noise characteristic spectrum can provide the basis for the early diagnosis of fan performance change.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TD724
本文编号：2219463
[Abstract]:Scholars at home and abroad have done a lot of research on the stability of ventilation system, but many factors affecting the stability of ventilation system are more qualitative and less quantitative. Based on this, this paper analyzes the ventilation system stability from three main aspects: the ventilation network structure, the main ventilator and the external factors, and establishes the mathematical model of the ventilation system stability. Based on the analysis of the results of the network calculation, the air curtain control method is put forward, and the relationship between the angle of installation of single and double screens and the wind resistance performance is obtained through Fluent simulation and field experiments in suburban mines, which provides a new method for wind flow control in angular roadway. Through the field measurement and computer simulation of the impact of cage and mining car on the system under different operating conditions, it is concluded that the cage hoisting has no effect on the system, and the headwind operation of the mine car has certain influence on the system. However, the conclusion that atmospheric pressure and natural wind pressure change have great influence on the system is not as good as that of atmospheric pressure and natural wind pressure. Finally, through numerical simulation and noise spectrum analysis of different types of fans, it is proved that the fan has a specific noise characteristic spectrum, and the contrast analysis of fan noise characteristic spectrum can provide the basis for the early diagnosis of fan performance change.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TD724
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本文编号：2219463
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