The coefficient of permeability of coal massgas attenuates with increase of volume stress and varies as parabola with porous pressure.The crtical pressnre is difinedas the extreme value of parabola.
英
美
- 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。