中文摘要：

运用自主研制的煤岩热流–固–耦合试验系统,以原煤为研究对象,进行不同静水压力条件下煤体瓦斯解吸试验。基于物理假设,以理想气体状态方程为桥梁,分析密闭环境中解吸瓦斯压力的变化规律。研究结果表明：随着静水压力的上升,封闭系统中煤体瓦斯压力升高0.277%～0.750%。煤中瓦斯压力的变化量δP由两部分组成：孔裂隙压缩引起瓦斯压力的变化量δPV和瓦斯解吸引起瓦斯压力的变化量δPd。随着静水压力的上升,瓦斯解吸引起的瓦斯压力变化量所占总瓦斯压力变化的比例ψ减小,煤体中瓦斯解吸压力所占初始瓦斯压力的比例ω增大,煤与瓦斯突出等煤矿动力灾害也越容易发生。

英文摘要：

Gas desorption of coal under different hydrostatic pressures in closed environment was studied based on the servo-controlled seepage equipment for thermal-hydrological- mechanical coupling of coal develgped in-house. The variation of the gas desorption pressure in the confined environment was analyzed with the state equation of ideal gas as a bridge. With the increase of hydrostatic pressure, the pressure of gas in the closed system increases by 0.277%- 0.750%. There are two parts in the change of gas pressure（SP）： the change-of the gas pressure caused by the spatial change of porosity and fracture caused by the stress loading（ 6Pv ） and the change of the gas pressure caused by the gas desorption（6Pd ）. With the increase of hydrostatic pressure, the proportion of 8Pd decreases, and the proportion of gas desorption pressure in coal increases. As a result, the coal and gas outburst and other dynamic disasters are more prone to occur.