陕西煤炭2024，Vol.43Issue(2)：27-33,43,8.DOI:10.20120/j.cnki.issn.1671-749x.2024.0206
基于CFD-DPM方法的通风速度对煤尘扩散影响分析
Influence of ventilation velocity on coal dust diffusion based on CFD-DPM method
李世民1
作者信息
- 1. 山西煤炭进出口集团蒲县豹子沟煤业公司,山西 临汾 041204
- 折叠
摘要
Abstract
The ventilation of pressure cylinders directly affects the diffusion of the dust particles,which reduce the visibility of road-header drivers,and also tend to slowdown operating efficiency.Taking the 2601 mechanized working face of a coal mine in Shanxi as an example,CFD-DPM method was adopted to examine the airflow flow and dust diffusion behaviors in roadway under various ventilation velocities.The simulation results show that airflow field could be divided into airflow fast and chaotic disordered area,recirculation area with dust backflow,and stable area from the heading face to the exit of the roadway.The airflow was observed to carry the dust particles along the roadway wall away from the pressure cylinders from the disordered areas into the recirculation areas due to the blocks caused by the road-headers.The dust migration slowed down in the areas behind the road-headers due to the sudden decreases in the airflow velocities.Then,large amount of dust particles were carried by airflow into the stable areas.The remaining dust was carried to the exits of the pressure cylinders as a result of the dust backflow.As a result,areas of approximately 5 m behind of the road-headers,as well as the areas near the pressure cylinders,had high dust concentrations.The dust particles were attracted to the exits of the pressure cylinders due to the strong entrainment effect,and its concentration increased with increasing of the ventilation velocities.However,this only occurred when ventilation velocities exceeded 17 m/s.关键词
矿井通风/煤尘/通风速度/气固两相流/气流迁移Key words
mine ventilation/coal dust/ventilation velocity/gas-solid two-phase flow/gas flow migration分类
矿业与冶金引用本文复制引用
李世民..基于CFD-DPM方法的通风速度对煤尘扩散影响分析[J].陕西煤炭,2024,43(2):27-33,43,8.
