向斜构造中煤体孔隙结构发育规律研究  

Study on the development law of coal pore structure in syncline structure

作　　者：王奥 刘健[1,2] 孙安祥[1] WANG Ao;LIU Jian;SUN Anxiang(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Key Laboratory of Safety and High-Efficiency Coal Mining,Ministry of Education,Huainan 232001,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《矿业安全与环保》2024年第2期53-58,共6页Mining Safety & Environmental Protection

基　　金：国家重点研发计划项目(2021YFC28000900);安徽省高校协同创新项目(GXXT-2020-057)。

摘　　要：为探究向斜构造中煤体孔隙结构发育规律,以长城三矿1311S工作面向斜构造为研究对象,从向斜构造区域不同位置选取煤样,通过低温氮气吸附实验,对煤体孔隙结构特征进行分析。结果表明,向斜构造区域内煤体孔隙结构呈现规律性分布,比表面积与总孔体积从轴部向两翼逐渐减小,平均孔直径则逐渐增大;最可几孔径均分布在2 nm左右,向斜轴部最可几孔径小于两翼;通过对比分析分形维数得出,随着两翼距离向斜轴部越近,分形维数数值呈现线性增大趋势。通过对同一向斜不同位置煤体的孔隙结构特征进行分析,总结出向斜构造中煤体孔隙结构发育规律。In order to explore the development law of coal pore structure in syncline structure,taking the syncline structure in 1311S working face of Changcheng No.3 Coal Mine as the research object,the characteristics of coal pore structure were analyzed by low temperature nitrogen adsorption experiment which the coal samples were drilled from different positions in syncline structure region.The results show that the pore structure of coal sample in the syncline structure region shows regular distribution:the specific surface area and total pore volume gradually decrease from the axis to the two wings,while the average pore diameter increases gradually;the maximum pore sizes are all distributed around 2 nm,and the diameter of the maximum pore size in the syncline axis is less than that of the two wings;through the comparative analysis of the fractal dimension,the value of the fractal dimension increases linearly with the nearer the distance between the two wings to the oblique axis.Based on the analysis of the pore structure characteristics of coal samples in different positions of the same syncline,the development law of coal pore structure in the syncline structure is summarized.

关 键 词：构造煤 孔隙结构 低温氮气吸附 比表面积 分形维数 吸附能力 

分 类 号：TD712.52[矿业工程—矿井通风与安全]