Study on the Dust Removal and Temperature Reduction Coupling Performances of Magnetized Water Spray

Abstract

Dust pollution and heat damage hazards are important problems affecting underground safety production. This paper is aimed at exploring the optimal magnetization conditions of magnetized water for dust removal and temperature reduction, and improve the utilization rate of water. First, the surface tension, viscosity and specific heat capacity of water under different magnetization conditions were measured experimentally. Then, the magnetization conditions with the best coupling performances were obtained through ANSYS Fluent simulation. Finally, a spray system was designed to control the magnetization conditions strictly. The results demonstrate that the dust removal performance is better when the magnetic field intensity is 150 mT and the magnetization time is 80 s. Under this condition, the specific heat capacity also reaches the maximum. These research results can provide a theoretical basis for the selection of dust pollution and heat damage control measures in mines.

Effect of Fragmentation on Pore Structures and Fractal Characteristics of Intact Coal and Deformed Coal Based on Experiments

“…The large increase in coal demand leads to the depletion of shallow coal resources and continues to extend to deep coal resources [4][5][6]. That leads coal and gas outburst disasters to become more and more serious, which greatly affects the safety of mine production [7][8][9][10]. A large number of research results found that there are deformed coal seams in the coal seams of gas outburst [11][12][13][14].…”