摘要
本文采用自制的渗流实验装置,进行了应力场和温度场作用下瓦斯的渗流特性实验研究,通过实验得出:轴向压力对煤样渗透的影响比围压要小;温度增加煤样的渗透率增加;渗透率与轴向有效应力、有效围压、平均有效应力成负指数关系;通过实验得到了渗透率与应力、温度的表达式。根据达西定律推导出了在地应力场、温度场作用下煤层瓦斯的渗流方程,建立的渗流方程可以模拟井下瓦斯在高地应力、高温下的渗透性质。
The essay adopted the self-developed seepage device to gas seepage character research within the operation of stress field and temperature field. Through this experiment came out the results as following： Axial stress causes less seepage on coal sample than enclosing stress does; seepage rate in coal sample rises with temperature;seepage rate makes a negative exponent relation to axially effective stress, effective enclosing stress σa and average effective stress σo ; the experiment also got the expression between seepage rate and stress and temperature. By using Darcy＇s law, a seepage equation of coal-seam gas in stress field and temperature field was deduced out, which is able to simulate the underground seepage characters of methane in high stress field and temperature.
出处
《中国矿业》
北大核心
2007年第5期113-116,共4页
China Mining Magazine
基金
重庆市院士专项资助项目(CSTC
2005AB6007)
关键词
地应力场
地温场
瓦斯
渗流方程
Ground stress field
Ground temperature field
Gas
Seepage equation
