To study the influence of the connectivity of coal seam pore and fracture structure on the occurrence and migration of coalbed methane.Taking coal samples from mining areas in the Lianghuai as experimental research objects,the three-dimensional visual reconstruction of the coal sample was carried out,the three-dimensional pore structure model and the equivalent pore network model of the coal sample were constructed,and the pore structure of the coal sample was characterized and analyzed by using a variety of algorithms and combined with the characterization unit,and the pore structure was analyzed from the perspective of the whole to the local.The results show as follows.C-type pores dominated in isolated pores,while F-type pores dominated in connected pores.The spatial distribution of the pore structure of the coal samples in Liuzhuang and Qidong is better than that of the coal samples in Renlou and Panyi mining areas,and has better connectivity.The overall connectivity between coarse types of throats is better than that between other types of throats.The large volume of connected pores occupies a dominant position in the pore structure of the coal samples in the Lianghuai area.The connectivity between Liuzhuang and Qidong coal samples is better than that between Renlou and Panyi coal samples,and the connectivity of Liuzhuang coal samples is the best,and the connectivity of Panyi coal samples is the worst.
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