泥岩遇水软化微观机理研究  

Research on Micro-mechanism of Softening and Argillitization of Mudstone

作　　者：黄宏伟[1] 车平[1] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2007年第6期733-733,共1页Journal of Tongji University:Natural Science

摘　　要：通过扫描电镜与X射线衍射仪对不含蒙脱石的华北中生代煤系地层泥岩的微观结构与物质组成进行分析，研究了该泥岩遇水软化过程中微观结构随时间变化的动态特征．研究表明：泥岩中的矿物颗粒在水的作用下，颗粒间的连结将逐渐破坏，使水分进入层状颗粒之间，从而在岩石内部产生不均匀内应力以及大量的微孔隙、A series of tests on the interaction between mudstone and water were conducted to research features of mudstone without montmorillonite from the Mesozoic coal-bearing strata of North China. The microstructure characteristics of mudstone in saturated state at different time were studied by means of scanning electron microscopy and X-ray diffraction analysis. The study shows that water will gradually undermine the cohesiveness between the mineral particles of mudstone in saturated state and enter the pores between the chip-shaped particles. Subsequently, it will result in uneven inner-stress and a lot of micropores in mudstone and induce softening and degradation. Results show that the decisive factor of mudstone softening and degradation in water is not the montmorillonite in the mudstone but the feature of mudstone microstructure.

关 键 词：水软化 泥岩 微观机理 X射线衍射仪 矿物颗粒 微观结构 物质组成 煤系地层 

分 类 号：P618.130.2[天文地球—矿床学]