The facts show that most coal dust explosion accidents in coal mines started from the coal roadway face and then expanded outward into large-scale malignant accidents. It can be seen that the dust-proof work of the excavation work face has a great relationship with the safe production of coal mines. The process of excavating the working face is complicated, the position of the dust-producing point is changeable, dust can be generated in each process, and the ventilation and working conditions are relatively poor. Therefore, various measures must be taken for different dust sources to implement comprehensive dust prevention. The entire process reaches the dust concentration allowed by the state. Since the founding of the People's Republic of China, we have accumulated rich experience in the comprehensive dust prevention of excavation. China has also carried out a lot of research on the dust prevention of comprehensive mechanized excavation and gradually applied it. The main dust prevention measures for the blasting face are: 1 Wet rock drilling, dry hole dust collection, wet electric drill or pneumatic pick; 2 Use water cannon mud, water spray, automatic blasting, water curtain air purification, etc. when shooting; 3 flushing the top and sprinkling the water; 4 anchor spray spray, low pressure near spray, machine tool reform, water curtain purification; 5 Strengthen ventilation and dust removal, reasonable wind speed, mixed ventilation, air flow purification, wet dust removal fan, etc. The comprehensive dust prevention measures for the excavation face are: 1 reasonable cutting parameters, cutting inside and outside the cutting head; 2 long pressure and short pumping ventilation; 3 The wall-mounted air duct supplies air to the head; 4 head water spray to reduce dust; 5 Dust out the dust from the dust collector for wet dust removal or dry filter bag dust removal. Auxiliary Equipment Of Electric Furnace Auxiliary Equipment Of Electric Furnace,Furnace Auxiliary Equipment,Auxiliary Products For Electric Arc Furnace,Heat Treatment Auxiliary Equipment ANYANG YOUNENGDE ELECTRIC CO.,LTD , https://www.younengde.com
Comprehensive dust prevention measures for driving face
Coal mine roadway heading face is generating a large amount of dust and focused workplace. The rock dust produced by the rock face is very high in free silica, generally 30% to 70%; the respirable dust generated by excavation can account for 80% to 90% of the total dust; the fine sand dust of the anchor spray operation serious. Therefore, the rock drilling face becomes the most dangerous place for silicosis. The coal roadway heading face has a large gas content, and it is mixed with the high concentration coal dust, which further increases the risk of explosion.