基于压汞法探究岩浆侵入对煤孔隙的影响

发布时间：2018-05-15 00:09

本文选题：煤孔隙 + 压汞法　；参考：《煤田地质与勘探》2017年03期

【摘要】：以平煤十三矿二1煤层中受岩浆侵入影响前后的贫瘦煤和无烟煤为研究对象,利用压汞法研究了热变质作用对煤中孔隙发育特征的影响。总结了压汞法测定煤中孔隙的实验原理以及煤中比表面积、孔容及其在不同孔径段分布的计算方法与过程,深入分析了不同样品孔容、比表面积的发育特征及其在不同孔径段的分布规律,并探讨了5.5 nm~350μm孔径范围内煤中孔隙的分形特征。研究表明:岩浆侵入致使煤中出现大量的新生孔隙,孔容和比表面积都显著增大,但中值孔容孔径、平均孔径减小,说明新生孔隙主要集中在小孔径段。而孔隙的空间分形维数变化规律表明岩浆侵入使煤中孔隙粗糙度增加,孔隙吸附能力增强,粒内孔分布范围增大。
[Abstract]:Taking lean coal and anthracite before and after magmatic intrusion in coal seam No. 1 of No. 13 coal mine as the research object, the influence of thermal metamorphism on pore development characteristics of coal was studied by mercury injection method. The experimental principle of mercury injection method for the determination of pores in coal, the calculation methods and processes of specific surface area, pore volume and their distribution in different pore sections are summarized, and the pore volume of different samples is analyzed in depth. The development characteristics of specific surface area and its distribution in different pore sizes are discussed, and the fractal characteristics of pores in coal in the range of 5. 5 nm~350 渭 m pore size are discussed. The results show that a large number of new pores appear in coal due to magmatic intrusion, and both pore volume and specific surface area increase significantly, but the median pore volume pore size and average pore size decrease, indicating that the new pores are mainly concentrated in the small pore size section. The variation of fractal dimension of pore space indicates that the porosity roughness and pore adsorption capacity of coal are increased due to magmatic intrusion, and the distribution range of pores in coal is increased.
【作者单位】：河南理工大学资源与环境学院;中原经济区煤层(页岩)气协同创新中心;同煤集团地质勘测处;
【基金】：国家自然科学基金项目(41172141) 教育部新世纪优秀人才支持计划项目(NCET-10-0133) 河南理工大学科技创新团队项目(T2013-2)~~
【分类号】：P618.11

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