Method for improving coal dust wettability

The invention provides a method for improving coal dust wettability. The method obtains an optimal surfactant compounding scheme for a certain specific coal dust by calculating surfactant interactionparameters and utilizing a molecular simulation method. The method comprises the following steps: 1, obtaining coal molecular components and structural information through coal dust analysis experiments such as industrial analysis and element analysis, and reasonably constructing a coal dust molecular model; 2, calculating interaction parameters according to a surfactant interaction parameter calculation formula, and determining surfactant compounding schemes; 3, simulating each compounding scheme by applying a Sorption module in Materials Studio8.0, comparing system water adsorption capacityunder all schemes, and preferably selecting an optimal surfactant compounding scheme; and 4, applying the optimal surfactant compounding scheme to the coal seam water injection work to improve the coal dust wettability. The in