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论述三维应力作用下煤体瓦斯渗透规律的实验设备与方法。介绍了阳泉３＃煤层、永红煤矿３＃煤层的试验结论。得出了煤体瓦斯渗透系数随体积应力增加而衰减，随孔隙压呈抛物线型变化。定义抛物线的极值点为临界压力。结论对研究煤矿瓦斯抽放与瓦斯突出有着十分重要的意义
Experimental Equipments and Methods for the Gas Infiltration of Coal under Three - dimensional Stress. The experimental conclusions of No.3 seam in Yangquan and No.3 seam in Yonghong Coal Mine are introduced. It is concluded that the gas permeability coefficient of coal decreases with the increase of volume stress and changes parabolically with the pore pressure. The extreme point that defines the parabola is the critical pressure. Conclusion It is very important to study gas drainage and gas outburst in coal mine