首山一矿综采工作面煤尘浓度-粒度分布规律研究

李新龙，杨  阳，胡雅婷

首山一矿综采工作面煤尘浓度-粒度分布规律研究

李新龙，杨阳，胡雅婷

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- 网络出版日期: 2023-09-04
- 刊出日期: 2023-09-04

Study on distribution law of coal dust concentration-particle size in fully mechanized mining face of Shoushan No.1 Mine

LI Xinlong

摘要

摘要: 为了解决综采工作面粉尘污染严重且防治困难的问题，对首山一矿综采工作面粉尘颗粒浓度-粒度分布规律进行研究，并提出了尘源多级多维封闭雾化控除尘技术。结果表明：风流在采煤机滚筒处发生绕流及横移，风速最大达到2.5 m/s，在距采煤机约10 m处趋于平稳；在前滚筒中心下风侧9 m区域内形成高速风流带，平均风速超过2.0 m/s；在距移架10 m内的未移架区采空区形成长达38 m的高浓度粉尘带，浓度约1 629~2 257 mg/m3；前滚筒中心高度附近高浓度粉尘带长度达40 m，浓度约1 590~2 845 mg/m3；在人行道区域，粉尘颗粒粒径为0.25~10 μm，对井下工作人员的呼吸造成巨大干扰。尘源多级多维封闭雾化控除尘技术应用后，现场呼尘平均降尘率为84.68%，总尘平均降尘率为88.52%。
- 综采工作面 /
- 粉尘浓度 /
- 粉尘粒度 /
- 粉尘防治 /
- 雾化封闭
Abstract: In order to solve the problems of serious dust pollution and difficult dust removal in fully mechanized coal mining face, we conduct research on the concentration and particle size field of dust in the fully mechanized mining face of Shoushan No.1 Mine, propose the dust source multi-level and multi-dimensional closed atomization control dust removal technology. The results show that the air flow occurs around and across the shearer drum, and the wind speed is up to 2.5 m/s, the wind speed tends to be stable at about 10 m away from the shearer; a high-speed wind flow zone was formed in 9 m area downwind of the center of the front drum, with the average wind speed exceeding 2.0 m/s. The high concentration dust belt with a length of 38 m is formed in the goaf of the unmoved frame area within 10 m away from it, and the concentration is between 1 629 mg/m3 and 2 257 mg/m3. The length of the high concentration dust belt near the center height of the front roller reaches 40 m, and the dust concentration in this range is between 1 590 mg/m3 and 2 845 mg/m3. In the pavement area, the particle size ranges from 0.25 μm to 10 μm, causing great disturbance to the breathing of the downhole workers. After the application of dust source multi-stage and multi-dimensional closed atomization control dust removal technology, the average dust reduction rate of on-site exhaled dust was 84.68%, and the average dust reduction rate of total dust was 88.52%.
- fully mechanized working face /
- dust concentration /
- dust particle size /
- dust prevention and control /
- atomization sealing

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参考文献(1)

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文章访问数: 34
HTML全文浏览量: 3
PDF下载量: 21
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首山一矿综采工作面煤尘浓度-粒度分布规律研究

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出版历程

Study on distribution law of coal dust concentration-particle size in fully mechanized mining face of Shoushan No.1 Mine

期刊类型引用(3)

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