新集一矿孔隙结构特征研究

为进一步了解新集一矿煤层孔隙结构特征,通过压汞法和低温氮等温吸附法实验手段对新集一矿主采煤层孔隙发育特征进行研究。发现新集一矿主采煤层孔隙度较比两淮矿区其他地区高。其中以8煤层8XJ5号样为代表孔隙分布以小孔最发育,大孔较发育,中孔少见为特征和以13-1煤层13XJ10号样为代表孔隙分布以小孔最发育为特征的基质孔,孔隙之间的连通差,不利于瓦斯的抽排;以11-2煤层11XJ3号样和6-1煤层6XJ15号样为代表中孔发育,孔隙以裂隙性为主,孔隙之间的连通较好,有利于瓦斯的运移。

Rearch on Pore Structure Features of Xinji No.1 Coal Mine

In order to further understand pore structure in coal seams of Xinji No.1 Coal Mine,the features of pore structure development in mayor coal seams were investigated with mercury intrusion method and cryogenic nitrogen adsorption method.It is found that porosity in the mayor coal seams of Xinji No.1 Coal Mine is bigger than in the other regions of Huainan and Huaibei Mining Areas.In sample No.8XJ5 from coal seam No.8 micropores are the best developed,macropores well developed,and mesopores rarely developed.In sample No.13XJ10 from coal seam No.13-1 micropores are the best developed,connection among pores is poor,which is unfavorable for gas drainage.In sample No.11XJ3 from coal seam No.11-2 and in sample No.6XJ15 from coal seam No.6-1 mesopores are well developed,in which fissures are predominated,and connection among fissures are good,which is good for gas migration.