黑色页岩遇水膨胀微观特征试验研究

doi:10.13722/j.cnki.jrme.2014.1147

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Abstract

In order to swelling characteristics of black shale，X-ray diffraction(XRD)，scanning electron microscope (SEM)，nitrogen adsorption test are carried out with different soaking time under the influence of water and mineral composition，microstructure，disintegration characteristics，crystal layer spacing and swelling force variation law of crystal layer on black shale are obtained. The research result shows that the trend of argillitization of black shale increases，and the illite/smectite interstratified clay minerals presents after water soaking. With the increase of saturated time，compact layer microstructure of black shale gradually changes to the irregular mass of flocculent structure，and micro-disintegration phenomenon appears. clay minerals content in black shale causes the floe hole，pore size of black shale decreases after soaking，and micro pore ratio increases；the clay minerals content of flocculation filled by 0.3–2.0 microns of micropores. Then，we specially select the interval and swelling force of (001) crystal layer among laminated structure series minerals，typically for the white mica，illite，chlorite and illite/smectite interstratified clay minerals，as calculation objects. The white mica series mineral crystal layer has the maximal interval growth as well as the swelling force of crystal layer has reach 92 kPa，an increase of 100%. The Chlorite series mineral crystal layer has the second interval growth. But the swelling force of crystal layer has an increase of 111.8%，up to 72 kPa. The Illite and illite/smectite interstratified clay minerals crystal layer has the smallest interval growth，in addition，the swelling force of crystal layer rose by 96.4%，up to 55 kPa.

Key words： rock mechanics black shale micro-characteristics spacing of crystal layer swelling force of crystal layer micropores

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	Articles by authors
	ZHU Baolong1
	LI Xiaoning1
	WU Xiyong2
	WANG Yingjie1

Cite this article:

ZHU Baolong1,LI Xiaoning1,WU Xiyong2, et al. EXPERIMENTAL STUDY OF MICRO-CHARACTERISTICS OF SWELLING FOR BLACK SHALE UNDER INFLUENCE OF WATER[J]. , 2015, 34(S2): 3896-3905.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1147 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3896

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