七星矿煤体的微观孔隙结构特征  

Characteristics behind microscopic pore structure of coal from Qixing Mine

作　　者：吴强 于洋[1,2] 高霞 张强[1,2] Wu Qiang;Yu Yang;Gao Xia;Zhang Qiang(School of Safety Engineering,Heilongjiang University of Science ＆ Technology,Harbin 150022,China;National Professional Center Lab of Safety Basic Research for Hydrocarbon Gas Pipeline Transportation Network,Harbin 150022,China;School of Civil Engineering,Heilongjiang University of Science ＆Technology,Harbin 150022 China)

机构地区：[1]黑龙江科技大学安全工程学院,哈尔滨150022 [2]黑龙江科技大学瓦斯等烃气输运管网安全基础研究国家级专业中心实验室,哈尔滨150022 [3]黑龙江科技大学建筑工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2018年第4期374-378,404,共6页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金面上项目(51674108);黑龙江省自然科学基金项目(JJ2018QN0076)

摘　　要：为有效控制瓦斯固化防突技术中水合物的饱和度,利用美国康塔Pore Master 33型压汞仪,对七星矿不同粒径型煤、原煤开展压汞实验,测定孔容、孔径分布。基于压汞实验总孔容值,获得不同粒径下制备型煤所需的初始含水量。结果表明,型煤与原煤进汞曲线均为Γ形,退汞曲线近似为直线。相同粒径型煤孔容差别较小,不同原煤试样孔容差别较大。不同粒径型煤孔隙中,大孔、中孔最为发育,有利于瓦斯水合物在煤体中生成。原煤孔径分布较分散,0.180~0.250 mm粒径煤体的总孔容均值最大,离散程度较小,可作为含瓦斯水合物煤体三轴实验所使用粒径。该研究为煤体中瓦斯水合物的生成及其饱和度控制提供了理论依据。This paper is designed for the effective control of hydrate saturation in gas solidification and outburst prevention technology. The research involves performing mercury injection experiments on briquette coal with different particle size and on rawcoal from Qixing Coal Mine Conta Master Pore Mercury Model 33 ; determining pore volume and pore size distribution; and identifying initial water content required for the preparation of briquette coal with different particle, based pore volume value from mercury injection experiments. The results demonstrate that both briquette and rawcoal have r-shaped intrusion mercury curves, and the extrusion mercury curves approximate to straight lines; the briquette coal with same particle size exhibits a smaller pore volume raw^ coal samples show^ greater pore volume deviations ; the best-developed macroporous and mesopore in the pores of briquettes with different grain sizes encourage the formation of gas hydrates in the coal ; the pore size of the rawcoal is of more dispersed distribution; and the occurrence of the maximum mean of total pore volume and the smallest degee of dispersion in the coal sample with 0.180 -0.250 mm particle size could allows the particle size to be used for the triaxial test on coal containing methane gas hydrate. The research could provide a theoretical basis for hydrate formation and its saturation control in the briqutte coal.

关 键 词：煤 微观孔隙结构 压汞法 孔径 孔容 水合物饱和度 

分 类 号：TD712[矿业工程—矿井通风与安全]