三轴应力下煤体对CH4/N2的吸附–解吸–扩散–渗流规律及变形特征研究

doi:10.13722/j.cnki.jrme.2022.1288

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Abstract The adsorption-desorption-diffusion-seepage characteristics of CH4/N2 are important indicators to measure the gas extraction capacity and N2 injection on gas displacement effect. In order to study the adsorption-desorption-diffusion-seepage law of CH4/N2 and the deformation characteristics of coal in the whole process of the experiment，the adsorption-desorption-seepage experiments of CH4/N2 were carried out. The timeliness characteristics of gas adsorption-desorption-seepage and coal deformation were analyzed. The influence of gas volume fraction on gas adsorption-desorption-seepage and coal deformation was clarified. The quantitative relationship between gas adsorption-desorption-seepage capacity and coal deformation were clarified. The space-time characteristics and anisotropic characteristics of coal deformation were discussed. A coal strain model for the whole process of CH4/N2 adsorption-desorption-seepage experiment was established. The results showed that under the same injection pressure of gas，the adsorption capacity/desorption capacity of pure N2 was the least，and the equilibrium time of adsorption/desorption was the shortest. As the increase of CH4 volume fraction in the mixture，the gas adsorption capacity/desorption capacity increased，and the adsorption/desorption equilibrium time prolonged. The adsorption capacity/desorption capacity of pure CH4 was the largest，and the equilibrium time of adsorption/desorption was the longest. The seepage capacity of pure N2 was the largest. As the volume fraction of CH4 in the mixed gas increased，the gas seepage capacity decreased，and the seepage capacity of pure CH4 was the least. The coal deformation produced by adsorption-desorption-seepage of CH4/N2 has timeliness，spatiality and anisotropy. The diffusion coefficients of CH4 and N2 in column coal had linear and quadratic function with pore partial pressure. The axial/circumferential adsorption strain and desorption strain of coal had a primary and quadratic function relationship with the gas volume fraction. The coal axial and circumferential of seepage strains had linear and cubic functions relationship with the gas volume fraction. The axial/circumferential strain of coal had a quadratic，primary，quadratic function relationship with the adsorption capacity，desorption capacity and seepage capacity，respectively. The coal stress in the process of gas adsorption-desorption-seepage covered the expansion stress of adsorbed gas to coal matrix，the compression stress of free gas to coal matrix，and the expansion stress of free gas to coal microporous fracture. Considering the three kinds of deformation effects by two state gases，a coal strain model in the whole process of CH4/N2 adsorption-desorption-seepage experiment was established.

Key words： mining engineering adsorption-desorption-diffusion-seepage dynamic characteristics deformation characteristics spatiotemporal characteristics deformation mechanism strain model

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	JI Pengfei1
	2
	LIN Haifei1
	2
	3
	KONG Xiangguo1
	2
	3
	LI Shugang1
	2
	3
	LONG Hang1
	2
	BAI Yang1
	2
	ZHAN Mengzhao1
	ZHAO Tianshuo1

Cite this article:

JI Pengfei1,2,LIN Haifei1, et al. Study on the law of CH4/N2 adsorption-desorption-diffusion-seepage and the coal deformation characteristics under triaxial stress#br#[J]. , 2023, 42(10): 2496-2514.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.1288 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I10/2496

[1]	谢和平，高峰，鞠杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报，2015，34(11)：2 161-2 178.(XIE Heping，GAO Feng，JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161-2 178.(in Chinese))
[2]	武强，涂坤，曾一凡，等. 打造我国主体能源(煤炭)升级版面临的主要问题与对策探讨[J]. 煤炭学报，2019，44(6)：1 625-1 636. (WU Qiang，TU Kun，ZENG Yifan，et al. Discussion on the main problems and countermeasures for building an upgrade version of main energy(coal) industry in China[J]. Journal of China Coal Society，2019，44(6)：1 625-1 636.(in Chinese))
[3]	秦勇，申建，史锐. 中国煤系气大产业建设战略价值与战略选择[J]. 煤炭学报，2022，47(1)：371-387.(QIN Yong，SHEN Jian，SHI Rui. Strategic value and choice on construction of large CMG industry in China [J]. Journal of China Coal Society，222，47(1)：371-387.(in Chinese))
[4]	康红普，牛多龙，张镇，等. 深部沿空留巷围岩变形特征与支护技术[J]. 岩石力学与工程学报，2010，29(10)：1 977-1 987.(KANG Hongpu，NIU Duolong，ZHANG Zhen，et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1 977-1 987.(in Chinese))
[5]	何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803-2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803-2 813.(in Chinese))
[6]	谢和平，任世华，谢亚辰，等. 碳中和目标下煤炭行业发展机遇[J].煤炭学报，2021，46(7)：2 197-2 211.(XIE Heping，REN Shihua，XIE Yachen，et al. Development opportunities of the coal industry towards the goal of carbon neutrality[J]. Journal of China Coal Society，2021，46(7)：2 197-2 211.(in Chinese))
[7]	李孥，王建良，刘睿，等. 碳中和目标下天然气产业发展的多情景构想[J]. 天然气工业，2021，41(2)：183-192.(LI Nu，WANG Jianliang，LIU Rui，et al. Multi-scenario conception on the development of natural gas industry under the goal of carbon neutrality[J]. Natural Gas Industry，2021，41(2)：183-192.(in Chinese))
[8]	李前贵，康毅力，罗平亚. 煤层甲烷解吸-扩散-渗流过程的影响因素分析[J]. 煤田地质与勘探，2003，31(4)：26-29.(LI Qiangui，KANG Yili，LUO Pingya. Analysis of the factors affecting process of CBM desorption，diffusion and percolation[J]. Coal Geology and Exploration，2003，31(4)：26-29.(in Chinese))
[9]	许江，张敏，李波波，等. 不同稳定时间对煤的变形及渗透特性影响试验研究[J]. 岩石力学与工程学报，2014，33(7)：1 388-1 397. (XU Jiang，ZHANG Min，LI Bobo，et al. Experimental research on deformation and permeability characteristics of coal at different stability times[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(7)：1 388-1 397.(in Chinese))
[10]	王登科，彭明，付启超，等. 瓦斯抽采过程中的煤层透气性动态演化规律与数值模拟[J]. 岩石力学与工程学报，2016，35(4)：704-712.(WANG Dengke，PENG Ming，FU Qichao，et al. Evolution and numerical simulation of coal permeability during gas drainage in coal seams[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(4)：704-712.(in Chinese))
[11]	林海飞，龙航，李树刚，等. 煤体瓦斯吸附解吸与压裂渗流全过程真三轴试验系统研发与应用[J]. 岩石力学与工程学报，2022，41(增2)：3 294-3 305.(LIN Haifei，LONG Hang，LI Shugang，et al. Development and application of true triaxial test system for the whole process of gas adsorption-desorption，fracturing and seepage in coal[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(Supp.2)：3 294-3 305.(in Chinese))
[12]	STAIB G，SAKUROVS R，GRAY E M. Kinetics of coal swelling in gases：Influence of gas pressure，gas type and coal type[J]. International Journal of Coal Geology，2014，132：117-122.
[13]	KELEMEN S R，KWIATEK L M. Physical properties of selected block Argonne Premium bituminous coal related to CO2，CH4，and N2 adsorption[J]. International Journal of Coal Geology，2009，77(1-2)：2-9.
[14]	YANG Z Z，YANG S，HAN J X，et al. Molecular simulation on competitive adsorptions of CO2，CH4，and N2 in deep coal seams[J]. Chemistry and Technology of Fuels and Oils，2020，56(4)：619-626.
[15]	李树刚，白杨，林海飞，等. CH4，CO2和N2多组分气体在煤分子中吸附热力学特性的分子模拟[J]. 煤炭学报，2018，43(9)：2 476- 2 483.(LI Shugang，BAI Yang，LIN Haifei，et al. Molecular simulation of adsorption thermodynamics of multicomponent gas in coal[J]. Journal of China Coal Society，2018，43(9)：2 476-2 483.(in Chinese))
[16]	BAE J S，BHATIA S K，RUDOLPH V，et al. Pore accessibility of methane and carbon dioxide in coals[J]. Energy and Fuels，2009，23(6)：3 319-3 327.
[17]	涂乙，谢传礼，李武广，等. 煤层对CO2、CH4和N2吸附/解吸规律研究[J]. 煤炭科学技术，2012，40(2)：70-72.(TU Yi，XIE Chuanli，LI Wuguang，et al. Study on CO2，CH4 and N2 adsorption and desorption law of seam[J]. Coal Science and Technology，2012，40(2)：70-72.(in Chinese))
[18]	唐书恒，汤达祯，杨起. 二元气体等温吸附-解吸中气分的变化规律[J]. 中国矿业大学学报，2004，33(4)：86-90.(TANG Shuheng，TANG Dazhen，YANG Qi. Variation regularity of gas component concentration in binary-component gas adsorption-desorption isotherm experiments[J]. Journal of China University of Mining and Technology，2004，33(4)：86-90.(in Chinese))
[19]	SHI J Q，DURUCAN S. A bidisperse pore diffusion model for methane displacement desorption in coal by CO2 injection[J]. Fuel，2003，82(10)：1 219-1 229.
[20]	LONG H，LIN H F，YAN M，et al. Adsorption and diffusion characteristics of CH4，CO2，and N2 in micropores and mesopores of bituminous coal：Molecular dynamics[J]. Fuel，2021，292：120268.
[21]	刘彦伟，刘明举. 粒度对软硬煤粒瓦斯解吸扩散差异性的影响[J].煤炭学报，2015，40(3)：579-587.(LIU Yanwei，LIU Mingju. Effect of particle size on difference of gas desorption and diffusion between soft coal and hard coal[J]. Journal of China Coal Society，2015，40(3)：579-587.(in Chinese))
[22]	安丰华，贾宏福，刘军. 基于煤孔隙构成的瓦斯扩散模型研究[J].岩石力学与工程学报，2021，40(5)：987-996.(AN Fenghua，JIA Hongfu，LIU Jun. A gas diffusion model based on the pore structure in coal[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(5)：987-996.(in Chinese))
[23]	YIN G Z，JIANG C B，XU J，et al. An experimental study on the effects of water content on coalbed gas permeability in ground stress fields[J]. Transport in Porous Media，2012，94(1)：87-99.
[24]	赵阳升，胡耀青，杨栋，等. 三维应力下吸附作用对煤岩体气体渗流规律影响的实验研究[J]. 岩石力学与工程学报，1999，18(6)：651-653.(ZHAO Yangsheng，HU Yaoqing，YANG Dong，et al. Experimental study on the effect of adsorption on gas seepage in coal mass under three-dimensional stress[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(6)：651-653.(in Chinese))
[25]	冯增朝，郭红强，李桂波，等. 煤中吸附气体的渗流规律研究[J]. 岩石力学与工程学报，2014，33(增2)：3 601-3 605.(FENG Zengchao，GUO Hongqiang，LI Guibo，et al. Study of adsorbed gas seepage law in coal[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 601-3 605.(in Chinese))
[26]	胡国忠，王宏图，范晓刚，等. 低渗透突出煤的瓦斯渗流规律研究[J]. 岩石力学与工程学报，2009，28(12)：2 527-2 534.(HU Guozhong，WANG Hongtu，FAN Xiaogang，et al. Investigation on law of methane gas flow in coal with coal-gas outburst hazard and low permeability[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(12)：2 527-2 534.(in Chinese))
[27]	KROOSS B M，VAN B F，GENSTERBLUM Y，et al. High-pressure methane and carbon dioxide adsorption on dry and moisture-equilibrated Pennsylvanian coals[J]. International Journal of Coal Geology，2002，51(2)：69-92.
[28]	CUI X，BUSTIN R M. Volumetric strain associated with methane desorption and its impact on coalbed gas production from deep coal seams[J]. AAPG Bulletin，2005，89(9)：1 181-1 202.
[29]	祝捷，张敏，传李京，等. 煤吸附/解吸瓦斯变形特征及孔隙性影响实验研究[J]. 岩石力学与工程学报，2016，35(增1)：2 620-2 626.(ZHU Jie，ZHANG Min，CHUAN Lijing，et al. Experimental study on coal strain induced by methane sorption/desorption and effect of pore features[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.1)：2 620-2 626.(in Chinese))
[30]	何满潮，王春光，李德建，等. 单轴应力-温度作用下煤中吸附瓦斯解吸特征[J]. 岩石力学与工程学报，2010，29(5)：865-872.(HE Manchao，WANG Chunguang，LI Dejian，et al. Desorption characteristics of adsorbed gas in coal samples under coupling temperature and uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：865-872.(in Chinese))
[31]	刘延保，曹树刚，李勇，等. 煤体吸附瓦斯膨胀变形效应的试验研究[J]. 岩石力学与工程学报，2010，29(12)：2 484-2 491.(LIU Yanbao，CAO Shugang，LI Yong，et al. Experimental study of swelling deformation effect of coal induced by gas adsorption[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 484-2 491.(in Chinese))
[32]	KARACAN C Ö. Swelling-induced volumetric strains internal to a stressed coal associated with CO2 sorption[J]. International Journal of Coal Geology，2007，72(3-4)：209-220.
[33]	CONNELL L D. A new interpretation of the response of coal permeability to changes in pore pressure，stress and matrix shrinkage[J]. International Journal of Coal Geology，2016，162(162)：169-182.
[34]	WANG S，ELSWORTH D，LIU J. Permeability evolution in fractured coal：The roles of fracture geometry and water-content[J]. International Journal of Coal Geology，2011，87(1)：13-25.
[35]	许江，彭守建，陶云奇，等. 蠕变对含瓦斯煤渗透率影响的试验分析[J]. 岩石力学与工程学报，2009，28(11)：2 273-2 279.(XU Jiang，PENG Shoujian，TAO Yunqi，et al. Experimental analysis of influence of creep on permeability of gas-bearing coal[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 273-2 279.(in Chinese))
[36]	魏建平，位乐，王登科. 含水率对含瓦斯煤的渗流特性影响试验研究[J]. 煤炭学报，2014，39(1)：97-103.(WEI Jianping，WEI Yue，WANG Dengke. Experimental study of moisture content influences on permeability of coal containing gas[J]. Journal of China Coal Society，2014，39(1)：97-103.(in Chinese))
[37]	刘延保. 极松软煤体高压吸附过程中变形特性试验研究[J].矿业安全与环保，2016，43(5)：1-4.(LIU Yanbao. Test study on deformation characteristics of extra-soft coal in high-pressure absorption process[J]. Mining Safety and Environmental Protection，2016，43(5)：1-4.(in Chinese))
[38]	郭平，曹树刚，张遵国，等. 煤体吸附膨胀变形模型理论研究[J].岩土力学，2014，35(12)：3 467-3 472.(GUO Ping，CAO Shugang，ZHANG Zunguo，et al. Theoretical study of deformation model of coal swelling induced by gas adsorption[J]. Rock and Soil Mechanics，2014，35(12)：3 467-3 472.(in Chinese))
[39]	LIU H，LIN B，YANG W. Theoretical models for gas adsorption-induced coal deformation under coal seam field conditions[J]. Energy Science and Engineering，2019，7(5)：1 504-1 513.
[40]	GUO X，WANG Z，ZHAO Y. A comprehensive model for the prediction of coal swelling induced by methane and carbon dioxide adsorption[J]. Journal of Natural Gas Science and Engineering，2016，36：563-572.
[41]	ZHANG X，ZHANG S，DU Z，et al. CO2 and N2 adsorption/desorption effects and thermodynamic characteristics in confined coal[J]. Journal of Petroleum Science and Engineering，2021，207：109166.
[42]	WANG D K，LV R H，WEI J P，et al. An experimental study of seepage properties of gas-saturated coal under different loading conditions[J]. Energy Science and Engineering，2019，7(3)：799-808.
[43]	ZHAO Y，LIN B Q，LIU T，et al. Flow field evolution during gas depletion considering creep deformation[J]. Journal of Natural Gas Science and Engineering，2019，65：45-55.
[44]	WANG K，FU Q C，ZHANG X，et al. Experimental investigation on strain changes during CO2 adsorption of raw coal sample：temperature and effective stress[J]. Energies，2021，14(3)：717.
[45]	林海飞，季鹏飞，孔祥国，等. 三轴应力下原煤吸附CH4/N2变形时空特性[J]. 中国矿业大学学报，2023，52(2)：314-328.(LIN Haifei，JI Pengfei，KONG Xiangguo，et al. Temporal and spatial characteristics of raw coal deformation during the adsorption of CH4/N2 under triaxial stress[J]. Journal of China University of Mining and Technology，2023，52(2)：314-328.(in Chinese))
[46]	张庆贺，袁亮，王汉鹏，等. 煤与瓦斯突出物理模拟相似准则建立与分析[J]. 煤炭学报，2016，41(11)：2 773-2 779.(ZHANG Qinghe，YUAN Liang，WANG Hanpeng，et al. Establishment and analysis of similarity criteria for physical simulation of coal and gas outburst[J]. Journal of China Coal Society，2016，41(11)：2 773-2 779. (in Chinese))
[47]	唐巨鹏，杨森林，王亚林，等. 地应力和瓦斯压力作用下深部煤与瓦斯突出试验[J]. 岩土力学，2014，35(10)：2 769-2 774.(TANG Jupeng，YANG Senlin，WANG Yalin，et al. Experiment of coal and gas outbursts underground stress and gas pressure in deep mines[J]. Rock and Soil Mechanics，2014，35(10)：2 769-2 774.(in Chinese))
[48]	王登科，魏建平，付启超，等. 基于Klinkenberg效应影响的煤体瓦斯渗流规律及其渗透率计算方法[J]. 煤炭学报，2014，39(10)：2 029-2 036.(WANG Dengke，WEI Jianping，FU Qichao，et al. Coalbed gas seepage law and permeability calculation method based on Klinkenberg effect[J]. Journal of China Coal Society，2014，39(10)：2 029-2 036.(in Chinese))
[49]	秦玉金，安丰华，苏伟伟，等. 基于Fick定律直接测定柱煤扩散系数变化规律及模型构建[J/OL]. 煤炭科学技术，DOI：10.13199/ j.cnki.cst.2022-0966.(QIN Yujin，AN Fenghua，SU Weiwei，et al. Direct determination of the diffusion coefficient variation of coal based on Fick's law and model construction[J/OL]. Coal Science and Technology，DOI：10. 13199/j. cnki.cst.2022-0966.(in Chinese))
[50]	FAN N，WANG J，DENG C，et al. Numerical study on enhancing coalbed methane recovery by injecting N2/CO2 mixtures and its geological significance[J]. Energy Science and Engineering，2020，8(4)：1 104-1 119.
[51]	YUAN R F，CHEN C L，WEI X，et al. Heat-fluid-solid coupling model for gas-bearing coal seam and numerical modeling on gas drainage promotion by heat injection[J]. International Journal of Coal Science & Technology，2019，6(4)：564-576.
[52]	何学秋，王恩元，林海燕. 孔隙气体对煤体变形及蚀损作用机理[J]. 中国矿业大学学报，1996，25(1)：6-11.(HE Xueqiu，WANG Enyuan，LIN Haiyan. Coal deformation and fracture mechanism under pore gas action[J]. Journal of China University of Mining and Technology，1996，25(1)：6-11.(in Chinese))
[53]	张遵国. 煤吸附/解吸变形特征及其影响因素研究[博士学位论文][D]. 重庆：重庆大学，2015.(ZHANG Zunguo. Study on characteristics of adsorption/desorption-induced defomation and its influencing factors[Ph. D. Thesis][D]. Chongqing：Chongqing University，2015.(in Chinese))
[54]	卢平，沈兆武，朱贵旺，等. 含瓦斯煤的有效应力与力学变形破坏特性[J]. 中国科学技术大学学报，2001，31(6)：293-296.(LU Ping，SHEN Zhaowu，ZHU Guiwang，et al. The effective stress and mechanical deformation and damage characteristics of gas-filled coal[J]. Journal of China University of Science and Technology，2001，31(6)：293-296.(in Chinese))
[55]	LIN H F，JI P F，KONG X G，et al. Experimental study on the influence of gas pressure on CH4 adsorption-desorption-seepage and deformation characteristics of coal in the whole process under triaxial stress[J]. Fuel，2023，333：126513.
[56]	白冰，李小春，杜学飞，等. 煤岩吸附气体时膨胀系数的一个估计方法[C]// 第十届全国岩石力学与工程学术大会论文集. 北京：中国电力出版社，2008：306-310.(BAI Bing，LI Xiaochun，DU Xuefei，et al. An estimate method for the gas adsorption induced swelling coefficient of coal[C]// Proceedings of the 10th National Conference on Rock Mechanics and Engineering. Beijing：China Electric Power Press，2008：306-310.(in Chinese))
[57]	王家臣，邵太升，赵洪宝. 瓦斯对突出煤力学特性影响试验研究[J]. 采矿与安全工程学报，2011，28(3)：391-394.(WANG Jiachen，SHAO Taisheng，ZHAO Hongbao. Experimental study of effect of gas on mechanical properties of outburst coal[J]. Journal of Mining and Safety Engineering，2011，28(3)：391-394.(in Chinese))
[58]	刘鹏，赵阳升，冯子军. 孔隙压和吸附引起煤体变形规律的试验研究[J]. 煤矿安全，2019，50(10)：5-8.(LIU Peng，ZHAO Yangsheng，FENG Zijun. Experimental study on deformation law of coal body by pore pressure and adsorption[J]. Safety in Coal Mine，2019，50(10)：5-8.(in Chinese))
[59]	SEVKET D，MUSTAFA A，SHI J Q. Matrix shrinkage and swelling characteristics of European coals[J]. Energy Procedia，2009，1(1)：3 055-3 062.
[60]	许江，刘龙荣，彭守建，等. 不同吸附性气体抽采过程中煤储层参数演化特征研究[J]. 岩土力学，2017，38(6)：1 647-1 656.(XU Jiang，LIU Longrong，PENG Shoujian，et al. Evolution characteristics of coal reservoir parameters in different adsorption gas extraction process[J]. Rock and Soil Mechanics，2017，38(6)：1 647-1 656.(in Chinese))
[61]	张雷，周宏伟，王向宇，等. 考虑时效影响的深部煤层瓦斯运移特性[J]. 煤炭学报，2019，44(6)：1 771-1 779.(ZHANG Lei，ZHOU Hongwei，WANG Xiangyu，et al. Characteristics of deep coalbed gas migration based on the time-dependent effect[J]. Journal of China Coal Society，2019，44(6)：1 771-1 779.(in Chinese))