采矿与安全工程学报2018，Vol.35Issue(1)：221-228,8.DOI:10.13545/j.cnki.jmse.2018.01.030
微观孔隙结构和煤的成分对煤样电阻率的影响
Effects of microscopic pore structure and coal composition on coal resistivity
摘要
Abstract
Investigations on the effects of microscopic pore structure and coal composition on the re-sistivity could provide theoretical basis for the application of electrical prospecting in coal mine. There-fore, in this study, six groups of coal samples were selected and tested by means of low temperature liq-uid nitrogen adsorption (LT-LN2A), field emission scanning electron microscope (FE-SEM) and resis-tivity-measurement equipment. Then according to the conductive mechanism of coal, effects of micro-scopic pore structure and coal composition on the resistivity were studied. Results show that the effects of pore structure on coal resistivity are multivariate function relation with multiple factors. The porosity and specific surface area (SSA) of coal sample both show U-mode change with the volatile. Porosity and SSA of medium metamorphism coal are the lowest. And effect of metamorphism degree on porosity is greater than the SSA. Coal resistivity increases with the increase in the volatile while decreases with the increase in metamorphism degree. Meanwhile, a U-mode change also exists between the resistivity and porosity. The effect of micro-pores on resistivity is greater than that of macro-pores and mesopores. And more micro-pores could lead to lower resistivity. In contrast, the higher resistivity appears in coal with more macro-pores and mesopores due to the occurrence of cracks and fractures. In addition, the type and contents of mineral elements in coal keeps a positive correlation to the ion conductive function and a negative relationship with the resistivity.关键词
煤/微观孔隙结构/电阻率/挥发分/矿物元素Key words
coal/microscopic pore structure/resistivity/volatile/mineral elements分类
矿业与冶金引用本文复制引用
李祥春,陆卫东,孟洋洋,刘艳,聂百胜,陈昔辉,朱飞飞..微观孔隙结构和煤的成分对煤样电阻率的影响[J].采矿与安全工程学报,2018,35(1):221-228,8.基金项目
国家重点研发计划项目(2016YFC0600708) （2016YFC0600708）
国家自然科学基金项目(51304212) （51304212）
北京市自然科学基金项目(8152014) （8152014）
中央高校基本科研业务费专项资金项目(2009QZ09) （2009QZ09）
