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| Study on water phase seepage evolution model considering mesoscale characteristics of pore and fissure in coal |
| WANG Gang1，2，3，WANG Shibin1，2，LI Huaixing2，3，QIN Xiangjie2，3，LI Shengpeng2，3 |
| (1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology，Shandong University of Science and Technology，Qingdao，Shandong 266590，China；2. College of Energy and Mining Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China；3. College of Safety and Environmental Engineering，Shandong University of Science and Technology，Qingdao，Shandong 266590，China) |
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Abstract Water phase percolation properties of coal with pore and fissure medium scale characteristics is of great significance for exploring cross-scale seepage of coal pore fissure structure. Using the concept of the representation unit to define the mesoscale lower bound of water seepage in coal pore fissure structure，and introducing the contribution rate correction coefficients of fissure and pore structures into the pore structure and fissure structure water seepage models，a cross-scale water seepage model of coal pore fissure structure was built. Through numerical analysis and water seepage experiment，the model was verified and its applicability was discussed. The results show that，with increasing the pore fissure rate，the correction coefficient of the contribution rate of the fissure structure increases while the correction coefficient of the contribution rate of the pore structure decreases，and that both show the rule of a power function. Both the model seepage velocity and the experimental seepage velocity increase with increasing the pore fracture rate. The consistency between the model calculation results and the experimental results is poor when the pore fissure rate is high while is high，when the pore fissure rate is low. The application of the stress in the experimental process has a great influence on the water seepage in the coal with a high pore fissure rate，while the influence for the coal with a low pore fissure rate is little. When the porosity is less than 3%，the variation coefficients of the data are all less than 15% with an average value of 9.70%，which indicates that the predicted values of the model are in good agreement with the actual experimental data and verifies the correctness of the model. The applicable conditions of the established prediction model are mesoscale and low pore fissure rate.
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[1] 侯鸣晓，张晓雨，康天合，等. 电化学强化无烟煤吸水性的实验研究[J]. 煤炭学报，2020，45(8)：2 940–2 948.(HOU Mingxiao，ZHANG Xiaoyu，KANG Tianhe，et al. Experimental study on electrochemical enhancement of water absorption of anthracite[J]. Journal of China Coal Society，2020，45(8)：2 940–2 948.(in Chinese))
[2] SNOW D T. A parallel model of fracture permeable media[Ph. D. Thesis][D]. Berkeley：University of California，1965.
[3] BRACKBILL T P，KANDLIKAR S G. Application of lubrication theory and study of roughness pitch during laminar，transition and low reynolds number turbulent flow at microscale[J]. Heat Transfer Engineering，2010，31(8)：635–645.
[4] BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics，1977，10(1/2)：1–54.
[5] 申林方，王志良，曾 叶，等. 基于粗糙岩体裂隙表面反应的格子Boltzmann渗流–溶解耦合模型[J]. 岩石力学与工程学报，2019，38(8)：1 615–1 626.(SHEN Linfang，WANG Zhiliang，ZENG Ye，et al. A coupled seepage and dissolution model of rough rock fractures considering surface reaction based on lattice Boltzmann method[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(8)：1 615–1 626.(in Chinese))
[6] 盛建龙，周 新，黄 涛，等. 基于VG-M模型的岩体单裂隙渗流特性分析[J]. 化工矿物与加工，2020，49(7)：27–32.(SHEN Jianlong，ZHOU Xin，HUANG Tao，et al. Analysis on the seepage characteristics for single fracture in rock masses based on the VG-M model[J]. Industrial Minerals and Processing，2020，49(7)：27–32.(in Chinese))
[7] 赵延林，曹 平，马文豪，等. 岩体裂隙渗流–劈裂–损伤耦合模型及应用[J]. 中南大学学报：自然科学版，2017，48(3)：794–803. (ZHAO Yanlin，CAO Ping，MA Wenhao，et al. Coupling model of seepage-splitting-damage of rock mass fractures and its application[J]. Journal of Central South University：Science and Technology，2017，48(3)：794–803.(in Chinese))
[8] WHITAKER S. Flow in porous media I：A theoretical derivation of Darcy¢s law[J]. Transport in Porous Media，1986，(1)：3–25.
[9] YAN C Z，JIAO Y Y. A 2D fully coupled hydro-mechanical finite-discrete element model with real pore seepage for simulating the deformation and fracture of porous medium driven by fluid[J]. Computers and Structures，2018，196：311–326.
[10] 钱自卫，黄 震，袁世冲. 基于3D 打印透明微细孔隙模型的多孔介质渗流规律[J]. 煤炭学报，2020，45(8)：2 901–2 907.(QIAN Ziwei，HUANG Zhen，YUAN Shichong. Pore seepage law based on 3D printed micro-pore model[J]. Journal of China Coal Society，2020，45(8)：2 901–2 907.(in Chinese))
[11] LIU T，LIN B Q，YANG W，et al. Impact of matrix-fracture interactions on coal permeability：model development and analysis[J]. Fuel，2017，207(1)：522–532.
[12] 王 清，王剑平. 土孔隙的分形几何研究[J]. 岩土工程学报，2000，(4)：496–498.(WANG Qing，WANG Jianping. A study on fractal of porosity in the soils[J]. Chinese Journal of Geotechnical Engineering，2000，(4)：496–498.(in Chinese))
[13] 员美娟. 多孔介质中流体的若干流动特性研究[博士学位论文][D]. 华中科技大学，2008.(YUAN Meijuan. Study on some flow characteristics of fluid in porous media[Ph. D. Thesis][D]. Wuhan：Huazhong University of Science and Technology，2008.(in Chinese))
[14] 王 刚，黄 娜，蒋宇静，等. 考虑分形特征的节理面渗流计算模型[J]. 岩石力学与工程学报，2014，33(增2)：3 397–3 405.(WANG Gang，HUANG Na，JIANG Yujing，et al. Seepage calculation model for rough joint surface considering fractal characteristics[J]. Chinese Journal of Geotechnical Engineering，2014，33(Supp.2)：3 397–3 405. (in Chinese))
[15] 高 为，易同生，金 军，等. 黔西地区煤样孔隙综合分形特征及对孔渗性的影响[J]. 煤炭学报，2017，42(5)：1 258–1 265.(GAO Wei，YI Tongsheng，JIN Jun，et al. Pore integrated fractal characteristics of coal sample in western Guizhou and its impact to porosity and permeability[J]. Journal of China Coal Society，2017，42(5)：1 258–1 265.(in Chinese))
[16] 汪文瑞，刘兆霞，王 刚，等. 考虑分形维数的注水模型及注水时间研究[J]. 采矿与安全工程学报，2018，35(4)：817–825.(WANG Wenrui，LIU Zhaoxia，WANG Gang，et al. Study on water injection model considering fractal dimension and water injection time[J]. Journal of Mining and Safety Engineering，2018，35(4)：817–825.(in Chinese))
[17] VAN KAMPEN N G. The expansion of the master equation[J]. Advances in Chemical Physics，1976，(34)：245–309.
[18] 李静海，胡 英，袁 权. 探索介尺度科学:从新角度审视老问题[J]. 中国科学：化学，2014，44(3)：277–281.(LI Jinghai，HU Ying，YUAN Quan. Mesoscience：exploring old problems from a new angle[J]. Scientia Sinica(Chimica)，2014，44(3)：277–281.(in Chinese))
[19] 杨 宁，李静海. 化学工程中的介尺度科学与虚拟过程工程：分析与展望[J]. 化工学报，2014，65(7)：2 403–2 409.(YANG Ning，LI Jinghai. Mesoscience in chemical engineering and virtual process engineering：analysis and perspective[J]. CIESC Journal，2014，65(7)：2 403–2 409.(in Chinese))
[20] 梁运涛，王树刚，蒋 爽，等. 煤炭自然发火介尺度分析：从表征体元宏观模型到孔隙微观模型[J]. 煤炭学报，2019，44(4)：1 138–1 146.(LIANG Yuntao，WANG Shugang，JIANG Shuang，et al. Analysis of mesoscale in coal spontaneous combustion：from macro- model of representative elementary volume scale to micro-model of pore scale[J]. Journal of China Coal Society，2019，44(4)：1 138–1 146. (in Chinese))
[21] 薛禹群. 地下水动力学[M]. 北京：地质出版社，1997：8–15.(XUE Yuqun. Dynamics of groundwater[M]. Beijing：Geological Publishing House，1997：8–15.(in Chinese))
[22] WU H，YAO Y B，ZHOU Y F，et al. Analyses of representative elementary volume for coal using X-ray μ-CT and FIB-SEM and its application in permeability predication model[J]. Fuel，2019，254(15)：115563.
[23] 蒋宇静，李 博，王 刚，等. 岩石裂隙渗流特性试验研究的新进展[J]. 岩石力学与工程学报，2008，27(12)：2 377–2 386.(JIANG Yujing，LI Bo，WANG Gang，et al. New advances in experimental study on seepage characteristics rock fractures[J]. Chinese Journal of Geotechnical Engineering，2008，27(12)：2 377–2 386.(in Chinese))
[24] 王者超，郑 天，杨金金，等. 岩体裂隙平行流与辐射流渗流特性研究[J]. 岩土力学，2020，41(增2)：1–8.(WANG Zhechao，ZHENG Tian，YANG Jinjin，et al. Seepage characteristics of parallel flow and radiation flow in rock fractures[J]. Rock and Soil Mechanics，2020，41(Supp.2)：1–8.(in Chinese))
[25] 赵 强. 裂缝流固耦合渗流机制研究[硕士学位论文][D]. 成都：西南交通大学：西南石油大学，2015.(ZHAO Qiang. Study on the mechanism of fluid-solid coupling seepage in fracture[M. S. Thesis][D]. Chengdu：Southwest Petroleum University，2015.(in Chinese))
[26] TESTAMANTI M N，REZAEE R. Considerations for the acquisition and inversion of NMR T2 data in shales[J]. Journal of Petroleum Science and Engineering，2019，174：177–188.
[27] YU J，RYAN T. ARMSTRONG，PEYMAN MOSTAGHIMI et al. Image-based fracture pipe network modeling for prediction of coal permeability[J]. Fuel，2020，270：1–8.
[28] COMITI J，RENAUD M. A new model for determining mean structure parameters of fixed beds from pressure drop measurements：application to beds packed with parallepipedal particles[J]. Chemical Engineering Science，1989，44(7)：1 539–1 545.
[29] YU B M，LI J H. Some fractal characters of porous media[J]. Fractal，2001，9(3)：365–372.
[30] 王 刚，江成浩，刘世民，等. 基于CT三维重建煤骨架结构模型的渗流过程动态模拟研究[J]. 煤炭学报，2018，43(5)：1 390–1 399. (WANG Gang，JIANG Chenghao，LIU Shimin，et al. Dynamic simulation of seepage process based on CT 3D reconstruction of coal skeleton structure model[J]. Journal of China Coal Society，2018，43(5)：1 390–1 399.(in Chinese))
[31] FENG Y J，YU B M，ZOU M Q，et al. A generalized model for the effective thermal conductivity of porous media based on self-similarity[J]. Journal of Physics D：Applied Physics，2004，37(21)：3 030–3 040.
[32] 王 越，白向飞，姜 英，等. 型煤中空隙分布规律试验研究[J]. 煤炭科学技术，2014，42(10)：113–116.(WANG Yue，BAI Xiangfei，JIANG Ying，et al. Experiment Study on Void Distribution Law of Briquette[J]. Coal Science and Technology，2014，42(10)：113–116.(in Chinese))
[33] 谢恩情. MT/T918—2002工业型煤孔隙率及视相对密度测定方法制定说明[J]. 煤质技术，2003，(1)：10–12.(XIE Enqing. MT/T918—2002 Description for the determination of porosity and apparent relative density of industrial briquette[J]. Coal Quality Technology，2003，(1)：10–12.(in Chinese))
[34] ROMM E S. Flow characteristics of fractured rocks[M]. Moscow：Nedra，1966：11–15.
[35] 郭海军，王 凯，崔 浩，等. 型煤孔裂隙结构及其分形特征实验研究[J]. 中国矿业大学学报，2019，48(6)：1 206–1 214.(GUO Haijun，WANG Kai，CUI Hao，et al. Experimental investigation on the pore and fracture structure of the reconstructed coal and its fractal characteristics[J]. Journal of China University of Mining and Technology，2019，48(6)：1 206–1 214.(in Chinese))
[36] WANG G，HAN D Y，QIN X J，et al. A comprehensive method for studying pore structure and seepage characteristics of coal mass based on 3D CT reconstruction and NMR[J]. Fuel，2020，281(1)：118 735.
[37] WANG G，HAN DY，JIANG C H，et al. Seepage characteristics of fracture and dead-end pore structure in coal at micro- and meso-scales[J]. Fuel，2020，266(15)：117 058. |
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2021, Vol. 40 
