不同温压作用下煤体对甲烷吸附量及其变形的试验研究
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摘要
基于温度和压力会影响煤体对甲烷吸附的这一特性,研究了煤体在不同温度和压力下对甲烷的吸附量和吸附过程中煤体的变形量,结果表明:随着温度的增加,煤体对甲烷的吸附量减小,升温对煤体的吸附能力起抑制作用;吸附甲烷后的标准煤样的轴向变形量与温度呈负相关关系,而与孔隙压呈正相关关系。在同一温度下,随着孔隙压力的增大,甲烷在煤体中的吸附量几乎呈线性关系增大;当温度为80℃时煤体发生显著的压缩变形。
Based on the characteristics that temperature and pressure affect the adsorption of methane on coal,the adsorption of methane on coal at different temperatures and pressures and the deformation of coal during adsorption are studied. The results show that: the adsorption of methane to coal decreased with increasing temperature. High temperature inhibited the adsorption capacity of coal; the axial deformation of the standard coal sample after adsorption of methane is negatively correlated with temperature and positively correlated with pore pressure. At the same temperature,with the increase of pore pressure,the adsorption amount of methane in the coal body increases almost linearly; when the temperature is 80℃, the coal body undergoes significant compression deformation.
Based on the characteristics that temperature and pressure affect the adsorption of methane on coal,the adsorption of methane on coal at different temperatures and pressures and the deformation of coal during adsorption are studied. The results show that: the adsorption of methane to coal decreased with increasing temperature. High temperature inhibited the adsorption capacity of coal; the axial deformation of the standard coal sample after adsorption of methane is negatively correlated with temperature and positively correlated with pore pressure. At the same temperature,with the increase of pore pressure,the adsorption amount of methane in the coal body increases almost linearly; when the temperature is 80℃, the coal body undergoes significant compression deformation.
引文
[1]李铭轩.中国煤层气开发利用现状和发展趋势[J].中国石油和化工标准与质量,2018,38(15):80-81.
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[4]姜黎明.综放工作面采空区瓦斯高效立体化抽采设计及应用[J].煤炭工程,2019,51(4):10-15.
[5]易丽军,俞启香.突出煤层密集钻孔瓦斯预抽的数值试验[J].煤矿安全,2010,41(2):1-4,9.
[6]张东明,白鑫,尹光志,等.低渗煤层液态CO2相变射孔破岩及裂隙扩展力学机理[J].煤炭学报,2018(11):3154-3168.
[7]邢俊旺,杨栋,康志勤,等.应力约束下煤体吸附解吸瓦斯变形特性的试验研究[J].煤矿安全,2018(10):9-12.
[8]李志强,鲜学福,隆晴明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报, 2009, 38(4):523-527.
[9]侯国培,郭昆明,岳茂庄,等.高位定向长钻孔瓦斯抽采技术应用[J].煤炭工程,2019,51(1):64-67.
[10]李波波,杨康,李建华,等.力热耦合作用下煤岩吸附及渗透特性的试验研究[J].煤炭学报,2018,43(10):2857-2865.
[2]黄盛初,刘文革,赵国泉.中国煤层气开发利用现状及发展趋势[J].中国煤炭,2009,35(1):5-10.
[3]王磊,杨栋,燕俊鑫,等.煤体吸附解吸瓦斯规律及细观特征研究[J].煤矿安全,2017,48(6):1-4.
[4]姜黎明.综放工作面采空区瓦斯高效立体化抽采设计及应用[J].煤炭工程,2019,51(4):10-15.
[5]易丽军,俞启香.突出煤层密集钻孔瓦斯预抽的数值试验[J].煤矿安全,2010,41(2):1-4,9.
[6]张东明,白鑫,尹光志,等.低渗煤层液态CO2相变射孔破岩及裂隙扩展力学机理[J].煤炭学报,2018(11):3154-3168.
[7]邢俊旺,杨栋,康志勤,等.应力约束下煤体吸附解吸瓦斯变形特性的试验研究[J].煤矿安全,2018(10):9-12.
[8]李志强,鲜学福,隆晴明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报, 2009, 38(4):523-527.
[9]侯国培,郭昆明,岳茂庄,等.高位定向长钻孔瓦斯抽采技术应用[J].煤炭工程,2019,51(1):64-67.
[10]李波波,杨康,李建华,等.力热耦合作用下煤岩吸附及渗透特性的试验研究[J].煤炭学报,2018,43(10):2857-2865.