低透气性煤孔隙结构研究

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英文篇名：Research on Pore Structure of Coal with Low Permeability 作者：顾熠凡 ; 王兆丰 ; 戚灵灵 英文作者：GU Yifan;WANG Zhaofeng;QI Lingling;School of Safety Science & Engineering, Henan Polytechnic University;Key Laboratory Breeding Base of Gas Geology & Gas Control; 关键词：低温氮吸附法 ; 压汞法 ; 滞后环 ; 孔隙结构 ; 透气性 英文关键词：low temperature nitrogen adsorption method;;mercury intrusion method;;hysteresis loop;;pore structure;;permeability 中文刊名：MKAQ 英文刊名：Safety in Coal Mines 机构：河南理工大学安全科学与工程学院;瓦斯地质与瓦斯治理重点实验室培育基地; 出版日期：2017-02-20 出版单位：煤矿安全 年：2017 期：v.48;No.510 基金：河南省高校基本科研业务费专项资金资助项目(NSFRF140105);; 2015年度河南省教育厅高等学校重点科研资助项目(15A440007);; 2014年地方高校国家级大学生创新创业训练计划资助项目(201410460036) 语种：中文; 页：MKAQ201702006 页数：5 CN：02 ISSN：21-1232/TD 分类号：26-30

摘要

为了研究低透气性煤的孔隙结构特征,采用低温氮吸附法和压汞法对桂箐煤矿M9无烟煤软煤层进行试验研究,结果表明:煤的孔径分布较广泛,从微孔到可见孔及裂隙均有发育,其中微孔最为发育,孔面积最大,占总比表面积的98%以上,有利于瓦斯的储存,而构成渗透容积的大、中孔及裂隙发育较少。煤的吸附-脱附和进、退汞曲线均不重合;脱附和退汞曲线均有拐点;退汞效率低,这说明煤中存在一端封闭的不透气孔和细颈瓶型孔,导致其透气性较差,不利于瓦斯的扩散及渗流,降低了抽采效率,容易发生煤与瓦斯突出。
        In order to study the pore structure characteristics of low permeability coal, we carry out experiments on M9 anthracite soft seam of Guiqing Coal Mine by low temperature nitrogen adsorption method and mercury intrusion method. The results show that the pore size distribution of coal is extensive and develops from micropores to visible holes and cracks. The micropore which is in favor of gas storage with the most distributed development and has the largest surface area, which accounts for more than98% of total surface area. However, large pores, medium pores and fractures, which form infiltrated volume, are less development.The adsorption-desorption curve and the advance and retreat mercury curve of coal are both not overlap. Both the desorption curve and the retreat mercury curve have inflection point. And the efficiency of retreat mercury is low. All of these show that impermeable pores and neck bottle type holes closed at one end in coal, which could lead to poor permeability, be not conducive to the gas diffusion and seepage, and reduce the extraction efficiency, be prone to coal and gas outburst.

引文

[1]刘正.低渗透煤层微观孔隙结构研究及应用[D].西安:西安科技大学,2013.
    [2]张红日,刘常洪.吸附回线与煤的孔结构分析[J].煤炭工程师,1993(2):23-27.
    [3]郝吉生,袁崇孚,张子戌.构造煤及其对煤与瓦斯突出的控制作用[J].焦作工学院学报(自然科学版),2000,19(6):403.
    [4]刘咸卫,曹运兴,刘瑞,等.正断层两盘的瓦斯突出分布特征及其地质成因浅析[J].煤炭学报,2000,25(6):571-575.
    [5]张小兵,闫江伟.瓦斯突出煤体形成的物理条件和过程[J].中国安全生产科学技术,2014(11):48-53.
    [6]薛世智.煤体透气性及其对煤与瓦斯突出的影响的探讨[J].甘肃科技纵横,2007,36(4):53.
    [7]周少华.焦作矿区不同破坏类型煤的瓦斯吸附特性研究[D].焦作:河南理工大学,2011.
    [8]霍多特BB.煤与瓦斯突出[M].北京:中国工业出版社,1966.
    [9]戚灵灵,王兆丰,杨宏民,等.基于低温氮吸附法和压汞法的煤样孔隙研究[J].煤炭科学技术,2012,40(8):36-39.
    [10]陈金妹,张健.ASAP2020比表面积及孔隙分析仪的应用[J].分析仪器,2009(3):61-64.
    [11]SJ雷特,KSW辛.吸附、比表面积和孔隙率[M].北京:化学工业出版社,1989.
    [12]IY Tarasevich.Porous structure and adsorption properties of natural porous coal[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2001,176(2-3):267-272.
    [13]Lingling Q,Zhaofeng W,Hongmin Y.Research on the Differences of the Pore Characteristics with Different Destroyed-Type Coals[J].Advanced Materials Research,2012,61(9):598-602.
    [14]刘爱华,傅雪海,梁文庆,等.不同煤阶煤孔隙分布特征及其对煤层气开发的影响[J].煤炭科学技术,2013,41(4):104-108.
    [15]陈悦,李东旭.压汞法测定材料孔结构的误差分析[J].硅酸盐通报,2006,25(4):198-201.
    [16]姜玮,吴财芳,赵凯,等.多煤层区煤储层孔隙特征及煤层气可采性研究[J].煤炭科学技术,2015,43(8):135-139.