The relevance of the study is caused by the need to reduce the additional aerodynamic load on the main fans associated with the occurrence of pressure drop caused by water build-up effect in mine ventilation shafts. This negative effect can lead to significant increase in the air resistance of the mine and to subsequent unstable operation mode of main fan. Avoiding this effect is impo... https://cosmeticssquadets.shop/product-category/throat-spray/