深部低透气性首采层煤与瓦斯气固耦合模型

doi:10.13722/j.cnki.jrme.2014.0106

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Abstract In order to eliminate the disturbances of coal permeability and diffusion coefficient on the correctness of coupled gas flow and coal deformation model. Firstly，the geostress condition of the first mined key seam is analyzed. Secondly，a modified P-M permeability model is proposed to match the pore structure characteristics of coal seam；Finally the governing equations for the coupled gas flow and solid deformation in dry coal seams are proposed，and the Klinkenberg effect has been taken into account，at the same time the relationships of the multiphysics fields have been discussed in detail. The coupled model has been used in simulating gas migration and permeability evolution in the first mined coal seam around drainage boreholes. Numerical results indicate that the Klinkenberg effect can have a critical influence on gas pressure during the entire methane degasification period，and the influence increases with time. The evolution of permeability is controlled by two opposite effects，compressive volumetric strain and matrix shrinkage，and the resulting permeability change is controlled by the mechanism that dominates.

Key words： mining engineering low permeability coal effective stress coal matrix shrinkage permeability model gas-solid coupled model

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.0106 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/Is1/2749

[1] 程远平，付建华，俞启香. 中国煤矿瓦斯抽采技术的发展[J]. 采矿与安全工程学报，2009，26(2)：127–139.(CHENG Yuanping，FU Jianhua，YU Qixiang. Development of gas extractioin technology in coal mines of China[J]. Journal of Mining and Safety Engineering，2009，26(2)：127–139.(in Chinese)) [2] 何满潮. 深部的概念体系及工程评价指标[J]. 岩石力学与工程学报，2005，24(16)：2 854–2 858.(HE Manchao. Conception system and evaluation indexes for deep engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 854–2 858.(in Chinese)) [3] 周世宁. 瓦斯在煤层中流动的机制[J]. 煤炭学报，1990，15(1)：15–24.(ZHOU Shining. Mechanism of gas flow in coal seams[J]. Journal of China Coal Society，1990，15(1)：61–67.(in Chinese)) [4] 郭勇义，周世宁. 煤层瓦斯一维流场流动规律的完全解[J]. 中国矿业大学学报，1984，13(1)：22–31.(GUO Yongyi，ZHOU Shining. Complete solutions of the law of gas flow in coal seams with one dimensional gas flow fields[J]. Journal of China University of Mining and Technology，1984，13(1)：22–31.(in Chinese)) [5] 林柏泉，周世宁. 煤样瓦斯渗透率的实验研究[J]. 中国矿业大学学报，1987，16(1)：21–28.(LIN Baiquan，ZHOU Shining. Experimental investigation on the permeability of the coal samples containing methane[J]. Journal of China University of Mining and Technology，1987，16(1)：21–28.(in Chinese)) [6] 李志强，鲜学福，姜永东，等. 地球物理场中煤层气渗流控制方程及其数值解[J]. 岩石力学与工程学报，2009，28(增1)：3 227–3 233. (LI Zhiqiang，XIAN Xuefu，JIANG Yongdong，et al. Seepage control equation of coalbed methane in geophysical field and its numerical solutions[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：3 227–3 233.(in Chinese)) [7] 刘保县，徐龙君，鲜学福，等. 煤岩多孔介质及其充瓦斯后的电特性研究[J]. 岩石力学与工程学报，2004，23(11)：1 861–1 866.(LIU Baoxian，XU Longjun，XIAN Xuefu，et al. Study on electrical properties of rock-coal porous media with gas[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(11)：1 861–1 866.(in Chinese)) [8] 王宏图，杜云贵，鲜学福，等. 地电场对煤中瓦斯渗流特性的影响[J]. 重庆大学学报：自然科学版，2000，(增1)：22–24.(WANG Hongtu，DU Yungui，XIAN Xuefu，et al. Seepage equation of coalbed gas in geophysical field[J]. Journal of Chongqing University：Natural Science，2000，(Supp.1)：22–24.(in Chinese)) [9] 徐涛，唐春安，宋力，等. 含瓦斯煤岩破裂过程流固耦合数值模拟[J]. 岩石力学与工程学报，2005，24(10)：1 667–1 673.(XU Tao，TANG Chun?an，SONG Li，et al. Numerical simulation of coupled gas flow in failure process of gassy coal-rock[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(10)：1 667–1 673.(in Chinese)) [10] 杨天鸿，徐涛，刘建新，等. 应力–损伤–渗流耦合模型及在深部煤层瓦斯卸压实践中的应用[J]. 岩石力学与工程学报，2005，24(16)：2 900–2 905.(YANG Tianhong，XU Tao，LIU Jianxin，et al. Coupling model of stress-damage-flow and its application to the investigation of instantaneous seepage mechanism for gas during unloading in coal seam with depth[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 900–2 905.(in Chinese)) [11] 杨天鸿，陈仕阔，朱万成，等. 煤层瓦斯卸压抽放动态过程的气–固耦合模型研究[J]. 岩土力学，2010，31(7)：2 247–2 252.(YANG Tianhong，CHEN Shikuo，ZHU Wancheng，et al. Coupled model of gas-solid in coal seams based on dynamic process of pressure relief and gas drainage[J]. Rock and Soil Mechianics，2010，31(7)：2 247– 2 252.(in Chinese)) [12] ZHU W，LIU J，SHENG J，et al. Analysis of coupled gas flow and deformation process with desorption and Klinkenberg effects in coal seams[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(7)：971–980. [13] 胡国忠，许家林，王宏图，等. 低渗透煤与瓦斯的固–气动态耦合模型及数值模拟[J]. 中国矿业大学学报，2011，40(1)：1–6.(HU Guozhong，XU Jialin，WANG Hongtu，et al. Research on a dynamically coupled deformation and gas flow model applied to low-permeability coal[J]. Journal of China University of Mining and Technology，2011，40(1)：1–6.(in Chinese)) [14] 孙可明，潘一山，梁冰. 流固耦合作用下深部煤层气井群开采数值模拟[J]. 岩石力学与工程学报，2007，26(5)：994–1 001.(SUN Keming，PAN Yishan，LIANG Bing. Numerical simulation of deep coal-bed methane multi-well exploitation under fluid-solid coupling[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：994–1 001.(in Chinese)) [15] 梁冰，章梦涛，潘一山，等. 瓦斯对煤的力学性质及力学响应影响的试验研究[J]. 岩土工程学报，1995，17(5)：12–18.(LIANG Bing，ZHANG Mengtao，PAN Yishan，et al. The experimental research on the effect of gas on mechanical properties and mechanical response of coal[J]. Chinese Journal of Geotechnical Engineering，1995，17(5)：12–18.(in Chinese)) [16] 蒋长宝，尹光志，黄启翔，等. 含瓦斯煤岩卸围压变形特征及瓦斯渗流试验[J]. 煤炭学报，2011，36(5)：802–807.(JIANG Changbao，YIN Guangzhi，HUANG Qixiang，et al. Experiment of deformation property and gas permeation of containing gas coal under confining pressure unloading process[J]. Journal of China Coal Society，2011，36(5)：802–807.(in Chinese)) [17] 许江，李波波，周婷，等. 加卸载条件下煤岩变形特性与渗透特征的试验研究[J]. 煤炭学报，2012，37(9)：1 493–1 498.(XU Jiang，LI Bobo，ZHOU Ting，et al. Experimental study of coal deformation and permeability characteristics under loading unloading conditions[J]. Journal of China Coal Society，2012，37(9)：1 493– 1 498.(in Chinese)) [18] 赵阳升. 煤体–瓦斯耦合数学模型及数值解法[J]. 岩石力学与工程学报，1994，13(3)：229–239.(ZHAO Yangsheng. Coupledmathematical model on coal mass-methane and its numerical method[J]. Chinese Journal of Rock Mechanics and Engineering，1994，13(3)：229–239. (in Chinese)) [19] 赵阳升，冯增朝，文再明. 煤体瓦斯愈渗机制与研究方法[J]. 煤炭学报，2004，29(3)：293–297.(ZHAO Yangsheng，FENG Zengchao，WEN Zaiming. The percolation mechanism and research method of methane in coal mass[J]. Journal of China Coal Society，2004，29(3)：293–297.(in Chinese)) [20] WU Y，LIU J，ELSWORTH D，et al. Dual poroelastic response of a coal seam to CO2 injection[J]. International Journal of Greenhouse Gas Control，2010，4(4)：668–678. [21] ZHAO Y，HU Y，ZHAO B，et al. Nonlinear coupled mathematical model for solid deformation and gas seepage in fractured media[J]. Transport in Porous Media，2004，55(2)：119–136. [22] HU G，WANG H，FAN X，et al. Mathematical model of coalbed gas flow with Klinkenberg effects in multi-physical fields and its analytic solution[J]. Transport in Porous Media，2009，76(3)：407–420. [23] NIE R S，MENG Y F，GUO J C，et al. Modeling transient flow behavior of a horizontal well in a coal seam[J]. International Journal of Coal Geology，2012，92(1)：54–68. [24] AN F，CHENG Y，WANG L，et al. A numerical model for outburst including the effect of adsorbed gas on coal deformation and mechanical properties[J]. Computers and Geotechnics，2013，54(2)：222–231. [25] 吴世跃. 煤层气与煤层耦合运动理论及其应用的研究[博士学位论文][D]. 沈阳市：东北大学，2006.(WU Shiyue. Research of methane-coalbed coupling movement theory and its application[Ph. D. Thesis][D]. Shenyang：Northeastern University，2006.(in Chinese)) [26] PILLALAMARRY M，HARPALANI S，LIU S. Gas diffusion behavior of coal and its impact on production from coalbed methane reservoirs[J]. International Journal of Coal Geology，2011，86(4)：342–348. [27] ZHANG J C，ROEGIERS J C，BAI M. Dual-porosity elastoplastic analyses of non-isothermal one-dimensional consolidation[J]. Geotechnical and Geological Engineering，2004，22(4)：589–610. [28] PALMER I，MANSOORI J. How permeability depends on stress and pore pressure in coalbeds：a new model[J]. SPE Reservoir Evaluation and Engineering，1998，1(6)：539–544. [29] DETOURNAY E，CHENG A H D. Fundamentals of poroelasticity[C]// Comprensive Rock Engineering Pergamon. Oxford：[s.n.]，1993：395. [30] 陈勉，陈至达. 多重孔隙介质的有效应力定律[J]. 应用数学和力学，1999，20(11)：1 121–1 127.(CHEN Mian，CHEN Zhida. Effective stress laws for multi-porosity media[J]. Applied Mathematics and Mechanics，1999，20(11)：1 121–1 127.(in Chinese)) [31] WU Y S，KARSTEN P. Gas flow in porous media with Klinkenberg effects[J]. Transport in Porous Media，1998，32(1)：117–137. [32] TABATABAEI M，ZHU D. Generalized inflow performance relationships for horizontal gas wells[J]. Journal of Natural Gas Science and Engineering，2010，2(2)：132–142. [33] 吴财芳，曾勇，秦勇. 煤与瓦斯共采技术的研究现状及其应用发展[J]. 中国矿业大学学报，2004，33(2)：137–140.(WU Caifang，ZHENG Yong，QIN Yong. Present situation，application，and development of simultaneous extraction of coal and gas[J]. Journal of China University of Mining and Technology，2004，33(2)：137–140.(in Chinese))