采煤机割煤产尘及粉尘运移规律的数值模拟

任志峰; 李远知; 武建君; 王兵建; 鲁忠良

采煤机割煤产尘及粉尘运移规律的数值模拟

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出版历程
- 发布日期: 2021-07-19

Numerical analysis on migration of shearer-generated dust in mechanized coal mining workface

摘要

摘要: 以晋能控股煤业集团轩岗煤电有限公司刘家梁矿2214综采工作面采煤机割煤产尘为研究对象，建立粉尘运移数学模型和综采工作面物理模型，确定边界条件，应用fluent软件进行数值模拟，分析了采煤机截割产尘运移分布规律。研究结果表明：双滚筒采煤机的前滚筒割煤下落高度较后滚筒大，且前滚筒割煤产尘受设备布置和强湍流气流的影响大，导致其迅速横向运移至采煤机司机工作区域，其中5 μm以下致病粉尘运移现象严重，是引起采煤机司机易患尘肺病的重要因素。通过对2214综采工作面进行现场测尘，数值模拟结果与现场实测相吻合。
- 割煤产尘 /
- 采煤机司机 /
- 粉尘运移 /
- 尘化气流 /
- 尘肺病
Abstract: The operating environment is polluted so seriously by shearer-generated dust that the shearer operators are one of most susceptible workers of coal pneumoconiosis in the mechanized coal mining workface of underground coal mines. In this work, we take 2214 mechanized coal mining workface of Liujialiang Coalmine in Xuangang Coal and Power Company Limited of Jinneng Holding Equipment Manufacturing Group as an example, and study the migration law of shearer-generated dust by numerical simulation. The results indicate that the falling height of the dust produced by the front cutting drum is more than that by the back one of the dual drum coal mining machine. The influence of equipment layout and strong turbulent air flow on the migration of coal dust produced by the front cutting drum is so great that they are quickly transported horizontally to the working area of the shearer operators, especially pathogenic dust below 5 μm, which is an important factor that causes the shearer operators to suffer from pneumoconiosis easily. The numerical simulation results are consistent with the field measurement of workface 2214.
- shearer-generated dust /
- shearer operator /
- dust migration /
- pulvation airflow /
- pneumoconiosis

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参考文献(19)

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