Coal and gas outbursts are a rapid and powerful energy-releasing process. The damage to coal and the release of gas in the initial stage play key roles in the occurrence of outbursts. Existing studies have mainly focused on the gas desorption processes in coal under specific conditions such as particle size, specified mass and exposure time of pulverized coal. However, these studies have focused less on the gas release during the initial stage, and the quantitative relationship between the outburst risk level and the test results. Seven coal samples with different metamorphic degrees were chosen for use in outburst simulation experiments to investigate trends in gas release from pulverized coal in the presence of N₂ and CO₂. The results demonstrate a strong correlation between the gas release capacity during the first 10 s and natural desorption gas content of the onset of coal exposure during the first 120 min. In general, the higher the gas content, the larger the released gas volume, and thus the larger the limiting amount of desorptive gas. The gas release from an outburst coal sample is larger than that from a non-outburst coal sample within the first 10 s. There is a good linear relationship between the initial volume of released gas (in the first 10 s) and the initial expansion energy of released gas (IEERG), which can reflect the risk of coal outburst. Thus, according to the outburst critical value (42.98 mJ/g) of IEERG, the critical value of initial volume of released gas could be calculated to be 1.113 cm³/g. The results can provide a reference for further study of the effect of gas on outbursts and the investigation of coal and gas outbursts disasters.

煤与瓦斯突出是一个快速而有力的能源释放过程。初期对煤的破坏和瓦斯的释放在突出发生中起关键作用。现有研究主要集中在煤在特定条件下的气体脱附过程，例如颗粒大小，特定质量和煤粉的暴露时间。但是，这些研究较少关注初始阶段的气体释放以及突出风险水平与测试结果之间的定量关系。选择了七个不同变质度的煤样品用于突出模拟实验，以研究存在N ₂和CO _2时煤粉中气体释放的趋势。结果表明，在最初的10 s内的瓦斯释放能力与在最初的120 min内暴露于煤的自然解吸气体含量之间存在很强的相关性。通常，气体含量越高，释放的气体量越大，因此吸附性气体的限制量也越大。在最初的10 s内，突出的煤样中的气体释放量大于非突出的煤样中的气体释放量。释放气体的初始体积（在最初的10 s内）与释放气体的初始膨胀能（IEERG）之间存在良好的线性关系，这可以反映出煤层突出的风险。因此，根据IEERG的突出临界值（42.98 mJ / g），可以计算出释放气体初始体积的临界值为1.113 cm ^3。/G。研究结果可为进一步研究瓦斯对突出的影响和调查煤与瓦斯突出灾害提供参考。