Abstract: During the process of coal seam water infusion or roadway spray, if the aqueous solution is modified so that it can absorb mathane gas well, the gas content of coal seam will be effectively reduced, and the outburst danger of coal seam may be eliminated. In this paper, the experimental device for methane dissolution was developed and processed, and the methane dissolution experiments under different temperatures, concentrations and pressures were conducted by selecting different surfactants with stong solubilization capacities. The results show that the methane solubility increases mainly in logarithmic way with the growth of gas concentration and gas pressure, and decreases exponentially with the increase of temperature. In addition, the solubility data of polypropylene glycol (PG) is largest among the four kinds of surfactants. The data can reach to 24.66 mL/100 mL in 10% PGM solution at normal temperature and pressure, which is 7.45 times to the pure water. In conclusion, the order of solubilization capacities among the four types of surfactants is: PG> Polyvinyl> THF> F-500. According to the experimental results, the calculation equation of methane solubility under different conditions was established, and the estimated values agree well with the experimental values. The results can provide reference to improve the effects of gas control by using hydrodynamic hydraulic measures in coal mines.

Key words: methane, solubility, surfactant, hydrodynamic hydraulic measures