Synergistic technology between surfactant and magnetized water for efficient dust control in underground coal mines

In order to effectively control the floating coal dust in the underground mine,based on the synergistic theory between surfactants and magnetization,some experiments were carried out to measure the characteristics of solution un- der the various experimental conditions,such as surface tension,contact angle and dust suppression properties of solu- tion,which validated that the magnetization can have the effective effect on the dust wettability of solution. And a com- pound surfactant was acquired,inducing excellent synergetic effects with magnetization. Additionally,the optimal mag- netization parameters were confirmed by the above mentioned experiments,e. g. a magnetic intensity of 350 mT and water flow velocity of 4 m / s;while combining the efficiently magnetic methods of the interlaced arrangement of inside and outside magnets and a spiral propulsion magnetization of water flow,the magnetic device and system were pro- posed. Field application indicated that the 0. 03% surfactant solution was effectively magnetized under the effect of al- ternating magnetization by the novel magnetic apparatus with the optimal magnetization parameters,of which dust con- trol ability was improved by more than 9% ;compared to that of water,the respirable dust and total dust suppression efficiency of surfactant-magnetized water is increased by 44. 94% and 31. 79% ,respectively,significantly improving the work environment in the underground coal mine.