基于低温液氮吸附实验的变形煤孔隙分布及其分形特征  

Research on the pore properties and fractal features of deformed coal based on the low-temperature nitrogen adsorption method

作　　者：郎伟伟[1] 宋志敏[2,3] 刘高峰[4] 任建刚[3,4] 

机构地区：[1]河南省煤田地质局,河南郑州450009 [2]河南工程学院资源与环境学院,河南郑州451191 [3]河南省高校煤矿清洁开发与资源利用工程技术研究中心,河南郑州451191 [4]河南理工大学资源环境学院,河南焦作454003

出　　处：《河南工程学院学报（自然科学版）》2015年第2期34-37,共4页Journal of Henan University of Engineering：Natural Science Edition

基　　金：国家自然科学基金项目(41302126);河南省重点科技攻关项目(132102310027;142102310030);河南省生物遗迹与成矿过程重点实验开放基金(OTMP1406)

摘　　要：选择平顶山十二矿和焦作中马村矿不同煤体结构的肥煤和无烟煤进行低温液氮吸附实验,分析研究变形煤的孔隙特征及其分形特征.研究表明,过渡孔和微孔是煤层气吸附发生的主要场所,其中微孔起着重要作用;分形维数反映了煤的煤化程度,即分形维数越大、煤化程度越深;分形维数表征孔容按孔径大小变化的分布特征,且分形维数与孔容含量有较好的相关关系.Fat-coal of the twelfth mine in Pingdingshan and blind-coal of Zhongma mine in Jiaozuo for different coal body structures were selected and tested by the low-temperature nitrogen adsorption method to analyze the coal pore properties and fractal features. The results show that the transition pore and micro-pore are the primary site of coal bed methane adsorption,and micro-pore plays an impor-tant role. The fat-coal fractal dimension is greater than the blind coal fractal dimension. The fractal dimension of fat-coal and blind coal gets larger with the damage of coal deepening. The fractal dimension has a good relative with volume content,which expresses pore vol-ume distribution properties well.

关 键 词：低温液氮吸附 孔隙特征 分形 

分 类 号：P618.11[天文地球—矿床学]