Abstract
The use of a biological dust suppressant for the prevention of mine dust was explored. A biological dust suppressant was prepared with Bacillus pasteurii, CaCl2 and urea as raw materials. The results show that the surface tension of the bacterial solution and the CaCl2-urea solution was 32.517 and 32.595 mN/m, respectively, which had a good effect on wetting coal dust. When the concentration of CaCl2-urea solution was 0.6 mol/L, the yield of mineralized products was the highest. In addition, the urease activity was the strongest. According to the wind resistance test, when the volume ratio of the bacterial solution to the CaCl2-urea solution was 1:1 and the CaCl2-urea solution was 0.6 mol/L, the dust suppression effect was the best. The above results show that MICP is a mine dust control technology with strong development prospects.
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