金烽寸草塔矿长焰煤孔隙结构特征及毛管力曲线模型研究  

Study on pore structure characteristics and capillary force curve model of long flame coal in Jinfeng Cuncaota mine

作　　者：甯江琪 唐明云[1,2] 骆大勇[1,2] NING Jiangqi;TANG Mingyun;LUO Dayong(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001 [2]安徽理工大学安全科学与工程学院,安徽淮南232001

出　　处：《华北科技学院学报》2025年第2期49-54,共6页Journal of North China Institute of Science and Technology

基　　金：国家自然科学基金项目(51774014)、煤炭安全精准开采国家地方联合工程研究中心开放基金项目(EC2022016)。

摘　　要：为了厘清长焰煤的孔隙结构特征及其与毛管力模型的适应性,本文以内蒙古金烽寸草塔煤矿长焰煤为研究对象,通过压汞实验研究了煤样孔隙结构孔径分布、孔容和孔隙形态三个方面的孔隙结构特征,在此基础上分析评价了5种毛管力模型对长焰煤的适应性。结果表明:煤样孔径分布可表示为微裂隙(>72445.3 nm)、渗流孔(100~72445.3 nm)、扩散孔(5.5~100 nm),其孔容大小分别为0.0065 mL/g、0.1558 mL/g、0.04 mL/g,孔隙结构具有墨水瓶特征,孔隙连通性差。通过毛管力模型适应性分析得到,陈科模型I能够很好地与实验数据拟合,拟合程度高达97%,可作为内蒙古长焰煤的毛管力曲线模型参考。In order to clarify the pore structure characteristics of long-flame coal and its adaptability to capillary force model,this paper takes the long-flame coal of Jinfeng Cuncaota Coal Mine in Inner Mongolia as the research object,and studies the pore structure characteristics of pore structure pore size distribution,pore volume and pore morphology of coal samples through mercury intrusion experiment.On this basis,the adaptability of five capillary force models to long-flame coal is analyzed and evaluated.The results show that the pore size distribution of coal samples can be expressed as microcracks(>72445.3 nm),seepage pores(100~72445.3 nm)and diffusion pores(5.5~100 nm).The pore volume is 0.0065 mL/g,0.1558 mL/g and 0.04 mL/g,respectively.The pore structure has the characteristics of ink bottle,and the pore connectivity is poor.Through the adaptability analysis of the capillary force model,Chenke model I can fit the experimental data well,and the fitting degree is as high as 97%,which can be used as a reference for the capillary force curve model of Inner Mongolia long flame coal.

关 键 词：长焰煤 压汞法 孔隙结构 毛管力模型 适应性评价 

分 类 号：TD35[矿业工程—矿井建设]