煤体瓦斯愈渗机理与研究方法

以物理学单纯孔隙介质的愈渗概念与方法为基础，提出了孔隙、裂隙介质愈渗研究方法，针对煤体中瓦斯赋存与渗流问题，在二维情况下，通过数值试验研究揭示了连通团个数、最大连通团孔隙比随孔隙率和裂隙分形维数的变化规律．结果表明，在裂隙数量分布初值n0=1的标准情况下，随着裂隙数量、分形维数增加，连通团个数对应的孔隙率点由30％逐渐降低到20％左右；当孔隙率高于35％时，裂隙数量分形维数高于1．45以后，最大连通团孔隙比增加较快，低于此值时，所有连通团包含的孔隙数均极小，这就是煤体低渗透的本质．

The percolation mechanism and research method of methane in coal mass

Based on percolation concept and method of pore media only in physics, presented percolation research method of pore and cracked media.Considering methane seepage and exist, revealed to the laws of cluster number and porosity ratio of max-cluster with changing of porosity and fractal dimension in conditional of 2D, gave a few conclusions: on conditional of primary value of fracture distribution n_(0)=1, increasing of fractal dimension of fracture number, porosity in accord with the max. of cluster number, changes from 30% to 20%.When porosity more than 35%, and fractal dimension more than 1.45, the porosity ratio of max-cluster increase fast, when less than (above) value all of clusters, the pore number of all of clusters is much little, that is mechanism of low impermeable of coal mass.