型煤渗透率随温度和有效应力变化的实验研究

摘要

为得出温度和有效应力对型煤渗透率的影响规律,采用自制加工的渗透实验装置,在不同温度和有效应力条件下进行型煤的渗透实验。从实验数据的图像看出,恒定温度时,型煤渗透率随着有效应力的增加而递减;恒定有效应力时,型煤渗透率随温度的升高而减小。通过对实验数据进行拟合,发现型煤渗透率与温度和有效应力均呈指数函数变化规律。因此,现场实际应用中,需要综合考虑温度与有效应力对煤层渗透率的影响。%To study the impact law of temperatures and effective stresses on briquette permeability,self-made permeability experiment instrument was taken to do permeability experiments under different temperatures and effective stresses conditions.According to the experiment database figures,when temperature is constant,briquette permeability will decrease with effective stress increasing;when effective stress is constant,briquette permeability will decrease with temperature increasing.By fitting the experiment database,the relationship between briquette permeability and temperature and effective stress was showed exponential function change law.Therefore,the impact of temperature and effective stress on briquette permeability should be considered comprehensively in real practice.