论文部分内容阅读
为研究煤体吸附甲烷的影响因素敏感性特征,选取温度、含水率、煤粒度、挥发分为煤吸附甲烷的影响因素,按照正交设计原理选取有代表性的试验点进行甲烷吸附试验,采用极差分析法进行因素敏感性分析,结果表明:Langmuir吸附常数a对各影响因素的敏感性大小次序为挥发分>温度>煤粒度>含水率;Langmuir吸附常数b对各影响因素的敏感性大小次序为挥发分>含水率>温度>煤粒度;对于同煤阶煤体,各影响因素中,温度对Langmuir吸附常数a起主要控制作用,而吸附常数a表征煤体对甲烷的极限吸附量,因此,井下采煤过程中,温度、含水率等多因素变化时,首要实时监测温度变化,以防止温度突然变化诱发瓦斯大量解吸,引发瓦斯超限甚至是煤与瓦斯突出事故。
In order to study the sensitive characteristics of the influencing factors of methane adsorption on coal, the influencing factors of methane adsorption by coal were selected according to the temperature, water content, coal particle size and volatilization. According to the orthogonal design principle, methane adsorption experiments were conducted with representative test points. Range analysis method for the sensitivity analysis of the factors, the results showed that: Langmuir adsorption constant a sensitivity of the various influencing factors in order of magnitude volatile> temperature> coal particle size> moisture content; Langmuir adsorption constant b sensitivity to the impact of various factors For the same coal rank coal, the influence of temperature on the Langmuir adsorption constant a plays a major role, while the adsorption constant a characterizes the coal to the limit of the amount of methane adsorption, Therefore, underground coal mining process, temperature, moisture content and other factors change, the first real-time monitoring of temperature changes in order to prevent a sudden change in temperature induced gas desorption, gas overrun or even coal and gas outburst accidents.