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Based on the gas-solid flow theory, we analyzed the factors influencing abrasive gas jet (AGJ) velocity. On the basis of a certain nozzle structure, the influence of abrasive characteristics on the effect of coal-breaking was studied experimentally. Through theoretical analysis, it was found that the main factors affecting abrasive velocity wereabrasive density and abrasive grain size. The experimental results showed that when the jet pressure remained unchanged, the coal-breaking depth of the Brown corundumwasthe largest among quartz sand, garnet and Brown corundum, and the 120-mesh abrasive coal-breaking effect wasthe optimal one among the respective 80-mesh, 120-mesh, 200-mesh and 280-mesh abrasives. In terms of the effect of abrasive characteristics on abrasive gas jet coal-breaking performance, abrasive stiffness topped the list, followed by abrasive density. Through experimental research, we identified the best jet target distance (7cm) and the best coal-breaking abrasive (120-mesh Brown corundum abrasive). [ABSTRACT FROM AUTHOR]