With the mechanization and the increased speed of the mining, the dust concentration in working faces gets more and more higher, and becomes a big threat to the health of the workers. In this paper, the dust-reduction mechanisms of the magnetization and the surfactant are analyzed. The parameters of the magnetization and the surfactant are determined by experiments based on the coal samples of a coal mine in Shanxi province, and it is shown that the best surfactant is LDLC, the best concentration is 0.1%, the best duration of magnetization is 60 seconds and the best strength of magnetization is 1000 mT. At the same time, the magnetic tube and the accessory equipment are designed. And the field test shows that after the test, the concentration of the total dust is reduced to 72% as compared to the usual dust-reduction measure, and the dusts of 2.5 μm are reduced to about 60%, so the environment of the working face is significantly improved.

dust-reduction  /  magnetization  /  surfactant  /  working face