(1. School of Safety Engineering，Heilongjiang University of Science and Technology，Harbin，Heilongjiang 150022，China；
2. School of Architecture and Civil Engineering，Heilongjiang University of Science and Technology，Harbin，Heilongjiang 150022，China；3. Institute of Mechanics，Chinese Academy of Sciences，Beijing 100190，China)
Abstract：To evaluate impacts of gas pressure on permeability and slippage effect of gas hydrate bearing coal，the permeability was measured for gas hydrate bearing coal under different gas hydrate saturations，particle sizes and gas pressures，by using triaxial testing machine for coupling action of stress，seepage and chemical effect. Then，the relationship between the gas hydrate saturation and the slippage effect was quantified by combining with the secondary permeability correction equation. Furthermore，the slippage effect was quantitatively evaluated on the permeability. The results show that：(1) The permeability of gas hydrate bearing coal exponentially decreases with the increase of the gas pressure with a reduction between 14.6% and 66.4%，and the permeability variation can be divided into two stages，including accelerated decrease stage and stable variation stage. (2) The permeability change rate and the gas pressure sensitivity coefficient are introduced to evaluate the sensitivity of the permeability of gas hydrate bearing coal to the gas pressure. The permeability change rate and the gas pressure sensitivity coefficient respectively increase and decrease rapidly with the increase of the gas pressure，if the gas pressure is less than 1.50 or 1.625 MPa，indicating that the sensitivity of the gas pressure is significant. (3) The hydrate saturation has significant influence on the slippage effect and the slippage factor decreases with the increase of the hydrate saturation. (4) The influence rate of the slippage effect on the permeability of the gas hydrate bearing coal ranges from 30.1% to 98.2%，and the influence rate of the slippage effect exponentially decreases with the increase of the gas pressure. The results can provide experimental reference for hydrate method application in coal and gas outburst prevention.
张保勇1，赵国建1，高 霞2，吴 强1，张旭辉3. 瓦斯压力对含水合物煤体渗透率及滑脱效应影响研究[J]. 岩石力学与工程学报, 2023, 42(11): 2655-2667.
ZHANG Baoyong1，ZHAO Guojian1，GAO Xia2，WU Qiang1，ZHANG Xuhui3. Experimental study on influence of gas pressure on permeability and slippage effect of gas hydrate bearing coal. , 2023, 42(11): 2655-2667.
[1] 袁 亮. 深部采动响应与灾害防控研究进展[J]. 煤炭学报，2021，46(3)：716–725.(YUAN Liang. Research progress of mining response and disaster prevention and control in deep coal mines[J]. Journal of China Coal Society，2021，46(3)：716–725.(in Chinese))
[2] 袁 亮. 我国深部煤与瓦斯共采战略思考[J]. 煤炭学报，2016，41(1)：1–6.(YUAN Liang. Strategic thinking of simultaneous exploitation of coal and gas in deep mining[J]. Journal of China Coal Society，2016，41(1)：1–6.(in Chinese))
[3] 白 鑫，王登科，田富超，等. 三轴应力加卸载作用下损伤煤岩渗透率模型研究[J]. 岩石力学与工程学报，2021，40(8)：1 536–1 546. (BAI Xin，WANG Dengke，TIAN Fuchao，et al. Permeability model of damaged coal under triaxial stress loading-unloading[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(8)：1 536– 1 546.(in Chinese))
[4] 唐巨鹏，郝 娜，潘一山，等. 基于声发射能量分析的煤与瓦斯突出前兆特征试验研究[J]. 岩石力学与工程学报，2021，40(1)：31–42.(TANG Jupeng，HAO Na，PAN Yishan，et al. Experimental study on precursor characteristics of coal and gas outbursts based on acoustic emission energy analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(1)：31–42.(in Chinese))
[5] 吴 强，李成林，江传力. 瓦斯水合物生成控制因素探讨[J]. 煤炭学报，2005，30(3)：283–287.(WU Qiang，LI Chenglin，JIANG Chuanli. Discussion on the control factors of forming gas hydrate[J]. Journal of China Coal Society，2005，30(3)：283–287.(in Chinese))
[6] 张保勇，于 洋，高 霞，等. 卸围压条件下含瓦斯水合物煤体应力–应变特性试验研究[J]. 煤炭学报，2021，46(增1)：281–290. (ZHANG Baoyong，YU Yang，GAO Xia，et al. Stress-strain characteristics of coal mine gas hydrate coal mixture under confining pressure unloading[J]. Journal of China Coal Society，2021，46(Supp.1)：281–290.(in Chinese))
[7] 宋永臣，黄 兴，刘 瑜，等. 含甲烷水合物多孔介质渗透性的实验研究[J]. 热科学与技术，2010，9(1)：51–57.(SONG Yongchen，HUANG Xing，LIU Yu，et al. Experimental study of permeability of porous medium containing methane hydrate[J]. Journal of Thermal Science and Technology，2010，9(1)：51–57.(in Chinese))
[8] 刘 瑜，陈 伟，宋永臣，等. 含甲烷水合物沉积层渗透率特性实验与理论研究[J]. 大连理工大学学报，2011，51(6)：793–797.(LIU Yu，CHEN Wei，SONG Yongchen，et al. Experimental and theoretical study of permeability character of sediments containing methane hydrates[J]. Journal of Dalian University of Technology，2011，51(6)：793–797.(in Chinese))
[9] 孙可明，翟 诚，辛利伟，等. 不同饱和度水合物沉积物的三轴加载渗透率试验[J]. 天然气工业，2017，37(12)：61–67.(SUN Keming，ZHAI Cheng，XIN Liwei，et al. Triaxial loading permeability experiments on hydrate bearing sediments with different saturations[J]. Natural Gas Industry，2017，37(12)：61–67.(in Chinese))
[10] 吴丹梅，李 刚，李小森，等. 不同水合物饱和度下渗透率变化特性的实验研究[J]. 化工进展，2017，36(8)：2 916–2 923.(WU Danmei，LI Gang，LI Xiaosen，et al. Experimental investigation of permeability characteristics under different hydrate saturation[J]. Chemical Industry And Engineering Progress，2017，36(8)：2 916–2 923.(in Chinese))
[11] 李 刚，李 超，李小森，等. 石英砂中甲烷水合物渗透率实验与模型验证[J]. 天然气工业，2017，37(12)：53–60.(LI Gang，LI Chao，LI Xiaosen，et al. The permeability experiment on the methane hydrate in quartz sands and its model verification[J]. Natural Gas Industry，2017，37(12)：53–60.(in Chinese))
[12] LIU W G，WU Z R，LI Y H，et al. Experimental study on the gas phase permeability of methane hydrate-bearing clayey sediments[J]. Journal of Natural Gas Science and Engineering，2016，36：378–384.
[13] WANG H J，WU P，LI Y H，et al. Gas permeability variation during methane hydrate dissociation by depressurization in marine sediments[J]. Energy，2023，263：125749.
[14] LV J C，JIANG L L，MU H L，et al. MRI investigation of hydrate pore habits and dynamic seepage characteristics in natural gas hydrates sand matrix[J]. Fuel，2021，303：121287.
[15] 张朝鹏，高明忠，张泽天，等. 不同瓦斯压力原煤全应力应变过程中渗透特性研究[J]. 煤炭学报，2015，40(4)：836–842.(ZHANG Zhaopeng，GAO Mingzhong，ZHANG Zetian，et al Research on permeability characteristics of raw coal in complete stress-strain process under different gas pressure[J]. Journal of China Coal Society，2015，40(4)：836–842.(in Chinese))
[16] 李波波，高 政，杨 康，等. 考虑温度、孔隙压力影响的煤岩渗透性演化机制分析[J]. 煤炭学报，2020，45(2)：626–632.(LI Bobo，GAO Zheng，YANG Kang，et al. Analysis of coal permeability evolution mechanism considering the effect of temperature and pore pressure[J]. Journal of China Coal Society，2020，45(2)：626–632.(in Chinese))
[17] 段淑蕾，李波波，李建华，等. 含水煤岩渗透率演化规律及动态滑脱效应的作用机制[J]. 岩石力学与工程学报，2022，41(4)：798–808.(DUAN Shulei，LI Bobo，LI Jianhua，et al. Permeability evolution of water-bearing coal considering dynamic slippage effect[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(4)：798–808.(in Chinese))
[18] 林柏泉，周世宁. 煤样瓦斯渗透率的实验研究[J]. 中国矿业学院学报，1987，16(1)：21–28.(LI Baiquan，ZHOU Shining. Experimental investigation on the permeability of the coal sample containing methane[J]. Journal of China University of Mining and Technology，1987，16(1)：21–28.(in Chinese))
[19] 许 江，张 敏，彭守建，等. 不同温度条件下气体压力升降过程中瓦斯运移规律的试验研究[J]. 岩土力学，2016，37(6)：1 579– 1 587.(XU Jiang，ZHANG Min，PENG Shoujian，et al．Experimental study of migration laws of gas during loading-unloading process at different temperatures[J]．Rock and Soil Mechanics，2016，37(6)： 1 579–1 587.(in Chinese))
[20] 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. The experimental study on the gas seepage law of rock related to adsorption under 3D stress[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(6)：651–653.(in Chinese))
[21] 王 刚，程卫民，郭 恒，等. 瓦斯压力变化过程中煤体渗透率特性的研究[J]. 采矿与安全工程学报，2012，29(5)：735–739.(WANG Gang，CHENG Weimin，GUO Heng，et al. Study on permeability characteristics of coal body with gas pressure variation[J]. Journal of Mining and Safety Engineering，2012，29(5)：735–739.(in Chinese))
[22] 隆清明，赵旭生，孙东玲，等. 吸附作用对煤的渗透率影响规律试验研究[J]. 煤炭学报，2008，33(9)：1 030–1 034.(LONG Qingming，ZHAO Xusheng，SUN Dongling，et al. Experimental study of coal permeability by adsorption[J]. Journal of China Coal Society，2008，33(9)：1 030–1 034.(in Chinese))
[23] 李波波，李建华，杨 康，等. 孔隙压力与水分综合作用的煤岩渗透率演化规律[J]. 中国矿业大学学报，2020，49(1)：44–53.(LI Bobo，LI Jianhua，YANG Kang，et al. Evolution law of coal permeability based on comprehensive effect of pore pressure and water[J]. Journal of China University of Mining and Technology，2020，49(1)：44–53.(in Chinese))
[24] 王登科，刘 建，尹光志，等. 突出危险煤渗透性变化的影响因素探讨[J]. 岩土力学，2010，31(11)：3 469–3 474.(WANG Dengke，LIU Jiang，YIN Guangzhi，et al. Research on influencing factors of permeability change for outburst-prone coal[J]. Rock and Soil Mechanics，2010，31(11)：3 469–3 474.(in Chinese))
[25] 尹光志，李小双，赵洪宝，等. 瓦斯压力对突出煤瓦斯渗流影响试验研究[J]. 岩石力学与工程学报，2009，28(4)：697–702.(YIN Guangzhi，LI Xiaoshuang，ZHAO Hongbao，et al. Experimental study of effect of gas pressure on gas seepage of outburst coal[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(4)：697–702.(in Chinese))
[26] 魏建平，李 波，王 凯，等. 受载含瓦斯煤渗透性影响因素分析[J]. 采矿与安全工程学报，2014，31(2)：322–327.(WEI Jianping，LI Bo，WANG Kai，et al. Influencing factors on permeability of loaded gas-bearing coal mass[J]. Journal of Mining and Safety Engineering，2014，31(2)：322–327.(in Chinese))
[27] HARPALANI S，CHEN G. Influence of gas production induced volumetric strain on permeability of coal[J]. Geotechnical and Geological Engineering，1997，15：303–325.
[28] MENG Y，LI Z，LAI F. Influence of effective stress on gas slippage effect of different rank coals[J]. Fuel，2021，285：119207.
[29] NIU Y F，MOSTAGHIMI P，SHIKHOV I，et al. Coal permeability：Gas slippage linked to permeability rebound[J]. Fuel，2018，215： 844–852.
[30] WANG K，DU F，WANG G D. Investigation of gas pressure and temperature effects on the permeability and steady-state time of Chinese anthracite coal：An experimental study[J]. Journal of Natural Gas Science and Engineering，2017，40：179–188.
[31] ZOU J P，CHEN W Z，YANG D S，et al. The impact of effective stress and gas slippage on coal permeability under cyclic loading[J]. Journal of Natural Gas Science and Engineering，2016，31：236–248.
[32] MENG J Q，NIE B S，ZHAO B，et al. Study on law of raw coal seepage during loading process at different gas pressures[J]. International Journal of Mining Science and Technology，2015，25(1)：31–35.
[33] TAO Y Q，LIU D，XU J，et al. Investigation of the Klinkenberg effect on gas flow in coal matrices：A numerical study[J]. Journal of Natural Gas Science and Engineering，2016，30：237–247.
[34] 颜荣涛，韦昌富，傅鑫晖，等. 水合物赋存模式对含水合物土力学特性的影响[J]. 岩石力学与工程学报，2013，32(增2)：4 115–4 122. (YAN Rongtao，WEI Changfu，FU Xinhui，et al. Influence of occurrence mode of hydrate on mechanical behaviour of hydrate-bearing soils[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(Supp.2)：4 115–4 122.(in Chinese))
[35] SLOAN E.D. Fundamental principles and applications of natural gas hydrates[J]. Nature，2003，426：353–359.
[36] 吴 杨，崔 杰，廖静容，等. 不同细颗粒含量甲烷水合物沉积物三轴剪切试验研究[J]. 岩土工程学报，2021，43(1)：156–164.(WU Yang，CUI Jie，LIAO Jingrong，et al. Experimental study on mechanical characteristics of gas hydrate-bearing sands containing different fines[J]. Chinese Journal of Geotechnical Engineering，2021，43(1)：156–164.(in Chinese))
[37] 郝永卯，薄启炜，陈月明，等. 天然气水合物降压开采实验研究[J]. 石油勘探与开发，2006，33(2)：217–220.(HAO Yongmao，BO Qiwei，CHEN Yueming，et al. Laboratory investigation of pressure development of natural gas hydrates[J]. Petroleum Exploration and Development，2006，33(2)：217–220.(in Chinese))
[38] 冯自平，沈志远，唐良广，等. 水合物降压分解的实验及数值模拟[J]. 化工学报，2007，48(6)：1 548–1 553.(FENG Ziping，SHEN Zhiyuan，TANG Liangguang，et al. Experimental and numerical studies of natural gas hydrate dissociation by depressurization in different scale hydrate reservoirs[J]. Journal of Chemical Industry and Engineering，2007，48(6)：1 548–1 553.(in Chinese))
[39] 李淑霞，李 杰，靳玉蓉. 不同饱和度的天然气水合物降压分解实验[J]. 化工学报，2014，65(4)：1 411–1 415.(LI Shuxia，LI Jie，JIN Yurong. Depressurizing dissociation of natural gas hydrate with different saturation[J]. Journal of Chemical Industry and Engineering，2014，65(4)：1 411–1 415.(in Chinese))
[40] ZHAO J F，ZHU Z H，SONG Y C，et al. Analyzing the process of gas production for natural gas hydrate using depressurization[J]. Applied Energy，2015，142：125–134.
[41] WANG S L，YANG M J，WANG P F，et al. In situ observation of methane hydrate dissociation under different backpressures[J]. Energy and Fuels，2015，29(5)：3 251–3 256.
[42] ZHAN L，WANG Y，LI X S. Experimental study on characteristics of methane hydrate formation and dissociation in porous medium with different particle sizes using depressurization[J]. Fuel，2018，230： 37–44.
[43] YANG M J，ZHENG J N，GAO Y，et al. Dissociation characteristics of methane hydrates in South China Sea sediments by depressurization[J]. Applied Energy，2019，243：266–273.
[44] WAN Q C，SI H，LI B，et al. Energy recovery enhancement from gas hydrate based on the optimization of thermal stimulation modes and depressurization[J]. Applied Energy，2020，278：115612.
[45] 张保勇，李焕如，高 霞，等. 饱和度对含瓦斯水合物煤体渗透率影响试验研究[J]. 煤炭学报，2023，48(增1)：122–129.(ZHANG Baoyong，LI Huanru，GAO Xia，et al. Experimental study on effect of saturation on the permeability of gas hydrate bearing coal[J]. Journal of China Coal Society，2023，48(Supp.1)：122–129.(in Chinese))
[46] 祝 捷，王 学，于鹏程，等. 有效应力对煤体变形和渗透率的影响研究[J]. 岩石力学与工程学报，2017，36(9)：2 213–2 219.(ZHU Jie，WANG Xue，YU Pengcheng，et al. Effects of the effective stress on deformation and permeability of coal[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(9)：2 213–2 219.(in Chinese))
[47] 刘 杰，张永利，崔余岩. 热力耦合作用下含瓦斯煤层渗透特性试验研究[J]. 辽宁工程技术大学学报：自然科学版，2017，36(12)：1 270–1 274.(LIU Jie，ZHANG Yongli，CUI Yuyan. Experimental study on permeability properties of coal containing gas with thermo-mechanical coupling[J]. Journal of Liaoning Technical University：Natural Science，2017，36(12)：1 270–1 274.(in Chinese))
[48] 侯东升，梁卫国，张倍宁，等. CO2驱替煤层CH4中混合气体渗流 规律的研究[J]. 煤炭学报，2019，44(11)：3 463–3 471.(HOU Dongsheng，LIANG Weiguo，ZHANG Beining，et al. Seepage law of mixed gases in CO2 displacement of coal seam CH4[J]. Journal of China Coal Society，2019，44(11)：3 463–3 471.(in Chinese))
[49] 巢志明，王环玲，徐卫亚，等. 不同饱和度砂岩渗透率、孔隙度随应力变化规律研究[J]. 岩石力学与工程学报，2017，36(3)：665–680.(CHAO Zhiming，WANG Huanling，XU Weiya，et al. Variation of permeability and porosity of sandstones with different degrees of saturation under stresses[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(3)：665–680.(in Chinese))
[50] 许 江，曹 偈，李波波，等. 煤岩渗透率对孔隙压力变化响应规律的试验研究[J]. 岩石力学与工程学报，2013，32(2)：225–230.(XU Jiang，CAO Jie，LI Bobo，et al. Experimental research on response law of permeability of coal to pore pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(2)：225–230.(in Chinese))
[51] 孙光中，王公忠，张瑞林. 构造煤渗透率对温度变化响应规律的试验研究[J]. 岩土力学，2016，37(4)：1 042–1 048.(SUN Guangzhong，WANG Gongzhong，ZHANG Ruilin. An experimental study on response law of permeability of tectonic coal samples to temperature variation[J]. Rock and Soil Mechanics，2016，37(4)：1 042–1 048.(in Chinese))
[52] 孟 雅，李治平. 覆压下煤的孔渗性实验及其应力敏感性研究[J]. 煤炭学报，2015，40(1)：154–159.(MENG Ya，LI Zhiping. Experimental study on the porosity and permeability of coal in net confining stress and its stress sensitivity[J]. Journal of China Coal Society，2015，40(1)：154–159.(in Chinese))
[53] MENG Y，LI Z P，LAI F P. Experimental study on porosity and permeability of anthracite coal under different stresses[J]. Journal of Petroleum Science and Engineering，2015，133：810–817.
[54] LU H L，LORENSON T D，MOUDRAKOVSKI I L，et al. The characteristics of gas hydrates recovered from the Mount Elbert gas hydrate stratigraphic test well，Alaska North Slope[J]. Marine and Petroleum Geology，2011，28(2)：411–418.
[55] TANG G H，TAO W Q，HE Y L. Gas slippage effect on microscale porous flow using the lattice Boltzmann method[J]. Physical Review E，2005，72(5)：056301–056308.
[56] 胡高伟，李承峰，业渝光，等. 沉积物孔隙空间天然气水合物微观分布观测[J]. 地球物理学报，2014，57(5)：1 675–1 682.(HU Gaowei，LI Chengfeng，YE Yuguang，et al. Observation of gas hydrate distribution in sediment pore space[J]. Chinese Journal of Geophysics，2014，57(5)：1 675–1 682.(in Chinese))
[57] 高 霞，刘文新，高 橙，等. 含瓦斯水合物煤体强度特性三轴试验研究[J]. 煤炭学报，2015，40(12)：2 829–2 835.(GAO Xia，LIU Wenxin，GAO Cheng，et al. Triaxial shear strength of methane hydrate-bearing coal[J]. Journal of China Coal Society，2015，40(12)：2 829–2 835.(in Chinese))
[58] ZHANG S J，SANG Q，DONG M Z. Experimental study of pressure sensitivity in shale rocks：Effects of pore shape and gas slippage[J]. Journal of Natural Gas Science and Engineering，2021，89：103885.
[59] 程远平，刘清泉，任廷祥. 煤力学[M]. 北京：科学出版社，2017：62–63.(CHENG Yuanping，LIU Qingquan，REN Tingxiang. Coal mechanics[M]. Beijing：Science Press，2017：62–63.(in Chinese))
[60] 王环玲，徐卫亚，巢志明，等. 致密岩石气体渗流滑脱效应试验研究[J]. 岩土工程学报，2016，38(5)：777–785.(WANG Huanling，XU Weiya，CHAO Zhiming，et al. Experimental study on slippage effects of gas flow in compact rock[J]. Chinese Journal of Geotechnical Engineering，2016，38(5)：777–785.(in Chinese))
[61] 朱光亚，刘先贵，李树铁，等. 低渗气藏气体渗流滑脱效应影响研究[J]. 天然气工业，2007，(5)：44–47.(ZHU Guangya，LIU Xiangui，LI Shutie，et al. A study of slippage effect of gas percolation in low permeability gas pools[J]. Natural Gas Industry，2007，(5)：44–47.(in Chinese))
2023, Vol. 42 
