煤屑瓦斯扩散系数时间响应规律研究

发布时间：2018-03-26 09:19

  本文选题：煤屑　切入点：瓦斯　出处：《河南理工大学学报(自然科学版)》2017年06期

【摘要】：为探讨煤屑瓦斯扩散系数随时间变化的响应规律,选取典型煤样进行煤屑瓦斯解吸扩散实验,建立了扩散系数随时间变化的球形煤屑瓦斯扩散微分方程,通过变量代换方法将得到的微分方程转化为经典的扩散方程,并运用分离变量法得到了煤屑时变扩散系数的理论解;基于扩散规律理论解对煤屑瓦斯解吸实验实测解吸数据进行分析,利用Matlab软件编制程序进行解算,得出瓦斯扩散系数的时间响应规律。研究结果表明:煤屑瓦斯等效扩散系数随时间响应规律符合幂函数关系,采用瓦斯扩散系数时间响应模型比经典瓦斯扩散模型和煤屑瓦斯扩散实验吻合度更高;煤屑瓦斯扩散系数时间响应模型描述煤层的瓦斯运移过程更合理、更准确。
[Abstract]:For the study of the response characteristics of coal gas diffusion coefficient changes with time, the typical coal coal gas desorption diffusion experiment, spherical wall of gas diffusion differential equations with time variable diffusion coefficient is established, by using variable substitution method of differential equation can be transformed into the classical diffusion equation, and using the method of separation of variables has been slack when variable diffusion coefficient theory solution; diffusion theory of coal gas desorption experimental solution desorption data were analyzed based on the solution of using Matlab software to program the response rule of the gas diffusion coefficient of time. The results show that the equivalent wall of gas diffusion coefficient with time response of the power function relationship, the gas diffusion coefficient of time response model than the classical gas diffusion model and coal gas diffusion experiment agree with the higher degree of coal gas diffusion coefficients; The inter response model is more reasonable and more accurate to describe the process of gas migration in coal seams.

【作者单位】： 河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地);河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金资助项目(51404100,51574112,51304072) 教育部创新团队计划项目(IRT_16R22) 河南省科技创新杰出青年基金资助项目(164100510013)
【分类号】：TD712
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本文编号：1667283