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《Journal of China Coal Society》 2004-03
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The percolation mechanism and research method of methane in coal mass

ZHAO Yang-sheng~(1,2),FENG Zeng-chao~(1),WEN Zai-ming~(1)(1.Mining Technology Institute, Taiyuan University of Technology, Taiyuan030024,China; 2.School of Energy Science and Engineering, China (University) of Mining and Technology, Xuzhou221008,China)  
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.
【Fund】: 国家自然科学基金资助项目(10102210;50174040)
【CateGory Index】: TD712
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