Abstract
Research on coal fragmentation can play an important role in understanding coal and gas outbursts. The study discussed in this paper explored the fragmentation of gas-containing coal particles using the drop-weight impact method. The effects of equilibrium gas pressures and type of adsorbate gas on particle size distributions and fragmentation energy were investigated in detail. We found that the Fractal particle size distribution model can most effectively describe the crushed coal particle sizes. The equilibrium pressure and type of gas can influence the Fractal distribution parameter. The crushing energy is composed of energy to create new surfaces and other forms of energy that are dissipated but the equilibrium gas pressure and type of adsorption gas can affect energy consumption and crushing efficiency. This research will be of guiding significance to the intensity evaluation and mechanism understanding of coal and gas outbursts.
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