Abstract：In this paper, taking Jiaozuo anthracite as the research object, its gas desorption is tested in the temperature environment of- 40 ℃, - 30 ℃, - 20 ℃, - 10 ℃, 0 ℃, 20 ℃ and 30 ℃ by a self-made high-low temperature desorption device. The results showed that: at low temperature ( 0 ℃ below) , temperature has a significant effect on the desorption quantity, the lower the temperature, the smaller the desorption quantity; the pressure has significant effects on the desorption quantity too, the lower the pressure, the smaller the desorption quantity; the larger the particle size, the smaller the desorption, but exists quantity limit size.Lower temperature coring can effectively reduce ambient temperature and the gas pressure, and can guarantee the integrity of coal. Thusly, it significantly reduces the loss amount and improves the accuracy of gas content determination.

Keyword：low temperature environment;gas;desorption quantity;different granularity;content determination;