College of Safety and Environmental Engineering, Shandong University of Science and Technology
Dongtan Coal Mine of Yankuang Energy Co. , Ltd.

瓦斯与水的水合作用可以促使煤层中的瓦斯气体以水合物的形态固化于煤层之中,为研究外在条件对瓦斯水合物生成的影响,自主搭建了静态水合物合成实验装置,开展了瓦斯水合作用实验,分别考察了促进剂添加量、初始压力对瓦斯水合作用的影响规律,分析了促进剂、初始压力对瓦斯水合物生成促进作用机理。结果表明:促进剂的添加有效增加了水合作用效果但却存在极限浓度,当促进剂浓度介于3wt%-8.7wt%时会促进水合作用的进行,浓度达到8.7wt%时作用效果最佳,而当促进剂浓度在14.4wt%时,则会减缓水合作用进程;初始压力与水合作用效果呈正相关关系,初始压力越高水合作用的速率越快,水合作用时间越长;通过对反应余气中甲烷组分的监测表明,促进剂和初始压力能够改变水合作用的进程,对于瓦斯水合固化效果起着决定性的作用。

The hydration of gas and water is used to promote the solidification of gas in the coal seam in the form of hydrate,which can prevent the rapid desorption of coal seam gas in the process of mining and eliminate the danger of coal and gas outburst. Therefore, we designed the experimental device for pressure-resistant hydration reaction, carried out gas hydration experiments, and investigated the effects of accelerator concentration and initial pressure on the formation of gas hydrates. The results showed that the addition of accelerator effectively increased the hydration effect but there was a limit concentration,when the accelerator concentration was between wt%-8. 7 wt%, it would promote the hydration process, and the best effect was when the concentration reached 8. 7 wt%, and when the accelerator concentration was 14. 4 wt%, it would slow down the hydration process. The initial pressure was positively correlated with the hydration effect, and the higher the initial pressure,the faster the rate of hydration and the longer the hydration time. According to the monitoring of methane component in the reaction residual gas, the accelerator and initial pressure can change the process of hydration, which is decisive to the solidification effect of gas hydration.

谢军,姜安琪,付伟,等.瓦斯气体水合固化作用影响因素分析[J].煤炭工程,2024,56(4):138-143.