In the process of coal-gas outburst, the gas-solid two-phase flow of pulverized coal and gas will induce large-scale damage to underground mining. In this work, in order to study the dynamic evolution law of gas-solid two-phase flow of coal-gas outburst, and clarify the short-time destructive effect of outburst dynamic phenomenon, an EDEM-FLUENT coupled model is constructed to realize the numerical simulation of coal-gas outburst two-phase flow. The simulation results show that the flow velocity of pulverized coal in a short time (tens of milliseconds) approaches to the maximum velocity rapidly, which can reach 60 m/s. The velocity of pulverized coal is inversely proportional to the particle size. The initial acceleration of particles is slow, and then the acceleration increases rapidly. The accumulation angle of pulverized coal in the outburst hole is about 21° and is far less than the natural accumulation angle of pulverized coal, which is consistent with the general phenomenon of coal-gas outbursts. The results also show that the shock wave overpressure of the coal-gas outburst of numerical simulation is similar to that of the physical simulation test, and the difference is less than 10%. And the pressure change in the roadway is completed in short time. In terms of spatial relationships, the pressure at the position closest to the outburst mouth is not the maximum, and the maximum pressure exists at a certain position away from the outburst mouth.

在煤-瓦斯突出过程中，煤粉与瓦斯的气固两相流动会对地下开采造成大面积破坏。本工作为研究煤—瓦斯突出气固两相流的动态演化规律，明确突出动态现象的短时破坏作用，构建了EDEM-FLUENT耦合模型，实现了煤-瓦斯突出的气固两相流动力学演化规律。煤-瓦斯突出两相流数值模拟[J]. 模拟结果表明，煤粉流速在短时间内（几十毫秒）迅速接近最大流速，可达60 m/s。粉煤的速度与粒度成反比。粒子的初始加速度很慢，然后加速度迅速增加。突出孔内煤粉堆积角约为21°，远小于煤粉自然堆积角，与一般的煤-瓦斯突出现象一致。结果还表明,数值模拟的煤-瓦斯突出冲击波超压与物理模拟试验相似,差异小于10%。并且在短时间内完成巷道压力变化。从空间关系上看，离出水口最近的位置压力不是最大，最大压力存在于远离出水口的某个位置。结果还表明,数值模拟的煤-瓦斯突出冲击波超压与物理模拟试验相似,差异小于10%。并且在短时间内完成巷道压力变化。从空间关系上看，离出水口最近的位置压力不是最大，最大压力存在于远离出水口的某个位置。结果还表明,数值模拟的煤-瓦斯突出冲击波超压与物理模拟试验相似,差异小于10%。并且在短时间内完成巷道压力变化。从空间关系上看，离出水口最近的位置压力不是最大，最大压力存在于远离出水口的某个位置。