煤层瓦斯含量直接拟合测定方法

Direct Fitting Determination Method for Coal Seam Gas Content

本文基于煤屑瓦斯扩散模型的理论研究和煤屑瓦斯解吸规律的实验研究的结果,提出了煤层瓦斯含量直接拟合测定方法,明确了煤层瓦斯含量直接拟合测定方法的主要步骤,利用直接拟合测定方法得到的瓦斯含量Q拟合与间接法测定的瓦斯含量Q间接相对误差δ小于10%,该方法具有可行性。并分析了取样时间对煤层瓦斯含量测定的影响,确定了不同变质程度的煤样在不同瓦斯吸附平衡压力下的合理取样时间。

Based on the theoretical research of the coal dust gas diffusion model and the experimental results of the coal dust gas desorption rule,this paper puts forward the measurement method of direct fitting of coal seam gas content,and defines the main steps of the measurement method of direct fitting of coal seam gas content,and the relative errorδbetween the Qfitting,which is the gas content obtained by the direct fitting method,and the Qindirect,which is the gas content determined by the indirect method,is less than 10%,and proves that the method is feasible.The influence of sampling time on the determination of coal seam gas content is analyzed,and the reasonable sampling time of coal samples with different metamorphic degrees under different gas adsorption equilibrium pressures is determined.