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煤的瓦斯放散性能是影响煤与瓦斯突出的一个重要因素,瓦斯放散初速度是表征瓦斯放散性能的主要指标之一,其影响因素较多。采用“四因素、四水平”正交试验方法,通过自主研发的MFGE-1型瓦斯放散初速度试验台,测定了粒径、水分、吸附时间及温度等影响下的瓦斯放散初速度;应用方差分析等方法,研究各因素对煤样瓦斯放散性能影响的敏感性,以及两者相互间的变化规律。结果表明:自主研发的瓦斯放散初速度试验装置可满足试验测定要求;粒径对瓦斯放散初速度的影响最大,其次是水分、温度及吸附时间;绘制了各因素对瓦斯放散初速度影响的直观分析图,得到瓦斯放散初速度随粒径、水分及温度增大而减小,随吸附时间增加而增大;与粒径、水分呈指数关系,与温度呈线性关系,与吸附时间呈幂函数关系,并构建了多因素影响下的综合模型。
Coal gas emission performance is an important factor affecting the coal and gas outburst. The initial gas release rate is one of the main indicators of gas drainage performance, and its influencing factors are many. The initial rate of gas diffusion under the influence of particle size, water content, adsorption time and temperature was determined by self-developed MFGE-1 Gas Dispersal Initial Velocity Test Bed using “four factors and four levels” orthogonal test method. Variance analysis and other methods were used to study the sensitivity of various factors to the gas-releasing characteristics of coal-gas mixture and the change law between the two. The results show that the self-developed gas diffusion initial velocity test device can meet the requirements of experimental determination. The particle size has the greatest influence on the initial velocity of gas release, followed by the moisture, temperature and adsorption time. The visual effect of various factors on the gas velocity The initial velocity of gas release decreases with the increase of particle size, water content and temperature, and increases with the increase of adsorption time. Exponential relationship with particle size and water content shows a linear relationship with temperature and a power function Relationship, and build a comprehensive model under the influence of multiple factors.