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煤和瓦斯突出是威胁煤矿井下安全生产的一个严重问题,而突出的发生将取决于瓦斯压力、煤层渗透率以及煤体强度等参数。因此,煤层渗透率对于煤和瓦斯突出以及煤层瓦斯抽放都具有重要意义.本文研究含瓦斯煤体在围压力不变的前提下,孔隙压力和渗透率以及孔隙压力和煤样变形间的关系;同时还研究了在孔隙压力一定的条件下,渗透率和围压力以及煤样变形间的关系;得出了在围压力不变的前提下,孔隙压力和渗透率以及煤样变形值间的关系基本上服从指数方程:K=u_1e~((?)v_1~p),S=u_2e~(v_2~p);在孔隙压力不变条件下,加载时,煤体的渗透率与载荷间的关系可用负指数方程表示:K=ae~((?)bσ);卸载时,可用幂函数方程表示:K=K_oσ~(-c)。
Coal and gas outburst is a serious problem that threatens the safe production in underground coal mines, and the outstanding occurrence will depend on such parameters as gas pressure, coal seam permeability and coal mass strength. Therefore, the permeability of coal seam is of great significance for coal and gas outburst and gas drainage of coal seam.This paper studies the relationship between pore pressure and permeability, pore pressure and deformation of coal samples under the premise of constant confining pressure At the same time, the relationship between permeability and confining pressure and the deformation of coal sample under the condition of certain pore pressure was also studied. The relationship between pore pressure and permeability and deformation value of coal sample was obtained under the condition of constant confining pressure The relationship basically follows the exponential equation: K = u_1e ~ (?) V_1 ~ p) and S = u_2e ~ (v_2 ~ p). Under the condition of constant pore pressure, the permeability of coal and the load The relationship can be expressed by the negative exponential equation: K = ae ~ ((?) Bσ); Unloading, the power function equation can be expressed: K = K_oσ ~ (-c).