Abstract
Dust seriously affects the safe production of coal mines, and a high dust concentration operating environment is harmful to the health of miners. It is necessary to take dust reduction measures on the working surface. In order to improve the effect of dust prevention and control on a fully mechanized excavation face, we studied the characteristics of dust production in a fully mechanized excavation face and the working principle of inside inhaling and outside pressing dust collectors, selected three shapes of dust collector trumpets, and used the FLUENT software to carry out the numerical simulation of air flow and dust concentration. By analyzing the state of movement of air flow and the concentration change in discrete phase dust particles through simulation, the results showed that the C-shaped bell mouth had the best effect on reducing the concentration of dust on the working surface and can effectively improve the working environment of a fully mechanized excavation face, which provides theoretical guidance for the prevention and control of dust in fully mechanized excavation work.
Highlights
China is the country with the largest coal production in the world and the country with the largest coal consumption
With the continuous progress of mining technology, the dust content in the air of fully mechanized working faces has risen sharply, which is a great threat to the safe production of coal and the life safety of miners
According to statistics of relevant departments, since the founding of the People’s Republic of China to 2014, more than 100 people died in major coal mine disasters, where coal dust was responsible for 14 deaths
Summary
China is the country with the largest coal production in the world and the country with the largest coal consumption. China’s coal industry situation is very grim in recent years, the proportion of coal consumption is still very high. This shows that coal will still be the main energy in China for a short period of time in the future. To do a good job in dust collection in the working face and to the maximum extent is the focus of dust prevention and control. Based on the working principle of inside inhaling and outside pressing dust collectors, the horn of a dust collector is optimized reasonably, and the optimal dust collecting efficiency of the dust collecting horn is analyzed by the FLUENT numerical simulation software
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