【作者】 杨涛；

【导师】 聂百胜；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2014， 博士

【摘要】 运用表面物理化学、热力学、吸附势理论等理论分析了煤体瓦斯吸附、解吸扩散动力过程的微观机理及吸附解吸过程中的温度变化机理，并利用设计完善的煤体瓦斯吸附解吸测试系统进行了不同条件下的煤体瓦斯吸附解吸规律实验研究。研究结果显示：煤体瓦斯吸附过程为温度升高的放热过程，解吸过程为温度降低的吸热过程。温度变化速率及变化幅度与煤样的变质程度、环境温度、煤样粒径、吸附平衡压力等因素相关，温度变化量与时间呈指数函数关系。计算了第一类边界条件下的煤体瓦斯解吸扩散系数，建立了煤体的温度变化量——涌出量数学模型，并通过对实验数据的拟合计算进行了验证分析。基于实验及理论分析结果提出了实验室煤与瓦斯突出验证性指标Δ ts，提出了一种基于相变材料相变放热提高煤层温度的煤体升温新方法。论文研究成果对于揭示煤与瓦斯突出机理、防治煤与瓦斯突出等方面具有应用和参考价值。更多还原

【Abstract】 The microscopic mechanism and thermal effect of dynamic process of gas adsorption, desorptiondiffusion dynamics process were analyzed by using theries thus as the surface physical chemistry,thermodynamics, and the adsorption potential theory. Gas adsorption and desorption experimentsunder different condisions were done by using the improved experimental system. The results showthat the adsorption process is a kind of exothermic process while the desorption process is a kind ofendothermic process. The variation and changing rate of temperature are related to the metamorphicgrade of coal, the environment temperature, the particle size of coal and the equilibrium pressure.Temperature variation with time accord with the exponential function. The diffusion coefficient wascalculated under the1st kind of boundary, and the Temperature variation vs. the desorption volumemodel was established. The model and the experimental data are fitted well. The verify indicators topredict coal and gas outburst was put forward under laboratory conditions. A new method to heat thecoal seam based on the phase change material was invented. The research results is valuable toreveal the mechanism of coal and gas outburst and to prevent coal and gas outburst.更多还原