可控微波场对煤体的孔隙结构及瓦斯吸附特性的影响

发布时间：2018-02-23 20:04

本文关键词： 微波场孔隙结构吸附能力热效应损伤效应　出处：《煤炭学报》2015年S2期 　论文类型：期刊论文

【摘要】：采用容量法、低温氮吸附法和压汞法,分别开展了无可控微波场作用和可控微波场作用后的煤样的甲烷等温吸附实验与孔隙结构特性测定实验,分析了可控微波场作用后煤体的甲烷吸附量、比表面积与孔径分布的变化规律。结果表明,可控微波场作用后的煤样的甲烷吸附曲线仍很好地遵守Langmuir方程,且可控微波场作用后煤样的甲烷吸附量小于无微波场作用的煤样;微波场作用对煤的孔隙结构与甲烷吸附特性的影响不随微波场的消失而消失,且随着微波场作用时间与功率的增加呈非线性变化;微波场的电磁辐射热效应与微波场的选择性作用特性引起的煤体损伤效应的综合作用改变了煤体的孔隙结构,影响了煤体的瓦斯吸附能力。
[Abstract]:The methane isothermal adsorption and pore structure characteristics of coal samples were studied by volumetric method, low temperature nitrogen adsorption method and mercury injection method, respectively. The changes of methane adsorption capacity, specific surface area and pore size distribution of coal under controlled microwave field are analyzed. The results show that the methane adsorption curve of coal samples under controlled microwave field still obeys the Langmuir equation. The methane adsorption capacity of the coal sample under controlled microwave field is lower than that of the coal sample without microwave field, and the effect of microwave field on the pore structure and methane adsorption property of coal does not disappear with the disappearance of microwave field. With the increase of the time and power of microwave field, the thermal effect of electromagnetic radiation and the damage effect of coal body caused by the selective action of microwave field have changed the pore structure of coal body, and the thermal effect of electromagnetic radiation of microwave field and the selective action characteristic of microwave field have changed the pore structure of coal body. The gas adsorption capacity of coal is affected.
【作者单位】：中国矿业大学矿业工程学院;中国矿业大学深部煤炭资源开采教育部重点实验室;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家自然科学基金资助项目(51104155) 江苏省基础研究计划(自然科学基金)资助项目(BK20141131) 江苏高校优势学科建设工程资助项目(SZBF2011-6-B35)
【分类号】：TD712

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