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不同浸水时间煤岩结构特性分析
供稿: 鲁杰;徐青云;宁掌玄 时间: 2019-10-23 次数:

作者:鲁杰徐青云;宁掌玄

作者单位:大同大学煤炭工程学院

摘要:为研究在不同浸水时间下水分在煤岩内部孔隙、裂隙中运移对煤岩特性的影响,利用核磁共振、扫描电镜等方法,系统地研究了不同浸水时间对煤岩细观结构演化特征的影响以及水煤相互作用的机理。核磁共振结果表明,随浸水时间增加,煤岩的渗透率会增大;扫描电镜结果表明,随浸水时间增加,煤岩结构会随之发生改变,解理裂隙增加,渗透能力增强。该研究结果可为煤体注水软化最佳时间确定提供理论依据。

基金:山西省科技攻关项目(20140321003-05);山西大同大学科研项目(2017K8);大同市科技计划立项项目(2018104);

关键词:细观结构;煤岩特性;浸水时间;核磁共振;扫描电镜;

DOI:10.16186/j.cnki.1673-9787.2019.5.5

分类号:TD313

Analysis of structural characteristics of the coal with different water immersion time

LU JieXU QingyunNING Zhangxuan

School of Mining Engineering, Datong University

Abstract:In order to study the influence of water migration in voids and fissures of the coal seam with different water immersion time, the nuclear magnetic method (NMR) and scanning electron microscope method (SEM) were used to analyze the water-coal interaction mechanism and structural characteristics of the coal with different water immersion time.The results of NMR showed that the coal seam permeability increased with water immersion time, and the results of SEM showed that with increasing of immersion time the coal seam structure changed, the cleavage and fissure extended and the permeability of the coal seam all increased.This study provided the optical time to soften coal seam by watering injection.

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