煤岩流体电动力学研究进展

doi:10.13722/j.cnki.jrme.2018.0790

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Abstract The electrokinetic effect(EKE) of rock and fluid is applied more and more in exploitation of underground resources such as enhancing oil and gas recovery，reinforcing soft rock in roadway and strengthening fluid flow in mine，et al. However，the blindness of engineering design and parameter selection reflects the lag of the theory. The researches of EKE were systematically summarized from three aspects，namely，the transport characteristics of the media，physical property and structural changes. Four main problems were pointed out including unclear transport process of multi-phase media，few researches of multi-field coupling，indistinct microscopic response mechanism of physical properties and unformed interface control concept of adsorption fluid，and the theoretical basis of double electric layers was clarified. On this basis，the concept of electrokinetic dynamics(EKD) of coal rock and fluid was proposed，which reveals the move rule of gas and liquid ions and the interactions with the external environment. The theory frame，taking double electric layers theory as the core，focusing on the electrokinetic effects such as electroosmosis，electrophoresis and electromigration and considering the outside physical and chemical field，was built. Five main research directions and four key techniques of EKD theory were summarized. The theory is suitable for the rocks with a larger specific surface area such as coal,mudstone and shale，and provides an effective method for many problems existing in exploitation of deep resources including difficult flooding in coal seam，blockage injury of coal power，slow desorption rate of methane，difficult support of soft swelling rock，slow dewatering of colloid filling and serious pollution of heavy metal in coal gangue，etc. The research also provides a new idea for revealing the mechanisms of fluid dynamic disasters of rock under the action of deep geoelectric field.

Key words： rock mechanics electrokinetic dynamic of rock and fluid geoelectric field electroosmosis electrophoresis electromigration deep mining

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	GUO Junqing
	KANG Tianhe
	KANG Jianting
	ZHANG Huixuan
	CHAI Zhaoyun
	ZHANG Bin
	ZHANG Xiaoyu

Cite this article:

GUO Junqing,KANG Tianhe,KANG Jianting, et al. Research progress of electrokinetic dynamics of rock and fluid[J]. , 2019, 38(3): 511-526.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0790 OR http://www.rockmech.org/EN/Y2019/V38/I3/511

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