无烟煤基质孔隙随温度变化规律的实验研究  

Experimental Study on Variation Law of Matrix Porosity with Temperature in Anthracite

作　　者：李建楼 LI Jianlou(School of Resources and Civil Engineering,Suzhou University,Suzhou 234000,China;Coal Mine Exploration Engineering Center of Anhui Province,Suzhou 234000,China;National Coal Mine Water Disaster Prevention and Control Engineering Technology Research Center,Suzhou 234000,China)

机构地区：[1]宿州学院资源与土木工程学院,安徽宿州234000 [2]安徽省煤矿勘探工程技术研究中心,安徽宿州234000 [3]国家煤矿水害防治工程技术研究中心,安徽宿州234000

出　　处：《宿州学院学报》2021年第9期51-54,共4页Journal of Suzhou University

基　　金：国家自然科学基金项目(41302274);国家火炬计划项目(2015GH030625);安徽省煤矿勘探工程技术研究中心平台项目(2014YKF02)。

摘　　要：为了研究温度对煤基质纳米级孔隙结构的影响,采集了宁夏汝箕沟煤矿原生结构无烟煤煤样,在实验室内对该煤样进行了不同温度下的加热模拟实验。通过对不同温度煤样的低温氮吸附-解吸曲线及孔隙结构参数对比分析,建立了煤基质孔隙结构参数和温度的相关关系。结果表明,随着煤体温度的升高,吸附量线性增大,无烟煤纳米级孔隙的比表面积和比孔容线性增加,平均孔径降低;无烟煤的孔隙直径大小、体积和比表面积对温度变化比较敏感,而孔隙形态特征受温度影响不明显。研究结果可以为煤层气开采和煤矿瓦斯灾害防治提供参考。To study the influence of temperature on nanoscale pore structure of coal matrix,the original structure anthracite samples were collected from Rujigou coal mine in Ningxia Province,and simulation experiments of coal samples under different temperatures were carried out in the laboratory.By comparing and analyzing the low temperature nitrogen adsorption-desorption curves and pore structure parameters of coal samples at different temperatures,the correlation between pore structure parameters of coal matrix and temperature was established.The results show that with the increase of coal temperature,the adsorption capacity,the specific surface area and specific pore volume of the nanoscale pores increase linearly,and the average pore diameter decreases.In addition,the result also shows that the pore diameter,volume and specific surface area of anthracite are sensitive to the temperature variation,whereas the pore morphological characteristics are not significantly affected by the temperature.The research results can provide reference for coal bed methane exploitation and gas disaster prevention and control in coal mining.

关 键 词：无烟煤 温度 吸附 纳米级孔隙结构 

分 类 号：P618.11[天文地球—矿床学]