Advance Search
YANG Zebin,LI Hao,MA Liqiang,et al. FDEM-CFD coupling analysis of spatiotemporal evolution of mining-induced overburden fracture-water inflow in shallow and thick coal seam under river[J]. Coal Science and Technology,2024,52(6):176−184. DOI: 10.12438/cst.2023-1161
Citation: YANG Zebin,LI Hao,MA Liqiang,et al. FDEM-CFD coupling analysis of spatiotemporal evolution of mining-induced overburden fracture-water inflow in shallow and thick coal seam under river[J]. Coal Science and Technology,2024,52(6):176−184. DOI: 10.12438/cst.2023-1161

FDEM-CFD coupling analysis of spatiotemporal evolution of mining-induced overburden fracture-water inflow in shallow and thick coal seam under river

Funds: 

National Natural Science Foundation of China (42102310); Basic Research Program of Shanxi Province (20210302123106); Open Fund Support Project of Shaanxi Provincial Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology (2021SKMS03)

More Information
  • Received Date: August 11, 2023
  • Available Online: June 02, 2024
  • The distribution of overlying rock fractures and water inflow during mining in shallow and thick coal seams under the river is one of the decisive factors for the safe production of working faces. Numerical simulation is an important prediction method for both, and the key to its rationality lies in the establishment of a rock mass failure fracture fluid coupling theory and corresponding simulation methods. Taking the 15404 working face of Lujiacun Mine as the research background, the normal and tangential constitutive relationships of non through crack cracking and through crack under tensile/shear stress are constructed. Based on the conservation of mass, momentum, and state equations of two-phase flow, the enhanced immersion boundary algorithm is combined to identify the fluid solid interface. The fluid volume method is used to track and reconstruct the fluid free surface inside the crack. On this basis, a coupling program of FDEM-CFD numerical model for predicting overlying rock fractures and water inflow in coal mining under the river is formed. The development height of the water conducting fracture zone is verified through the observation of the consumption of flushing fluid in adjacent working faces, and the results of water inflow are compared using the large well method theory. The results indicate that the coupling theory of mining rock mass failure and fracture fluid, as well as the corresponding FDEM-CFD program, can numerically achieve the formation of overlying rock fractures in shallow and thick coal seams under rivers during mining, as well as the fluid transport process within the fractures. When the working face advances to 80-120 m, a water conducting crack that runs through the surface is formed within the overlying rock. The main discharge path of the Zhaoshan River is the water diversion fissure located about 8-20 m behind the working face, which is inclined towards the goaf and has an inclination angle of about 65°-72°. The simulated water inflow in the goaf is 18.78 m3/h, which is close to the calculation results of the large well method. The above achievements have been preliminarily applied in the Lujiacun mining area, providing theoretical support for further carrying out water prevention and control projects in shallow and thick coal seams under the river.

  • [1]
    丁百川. 我国煤矿主要灾害事故特点及防治对策[J]. 煤炭科学技术,2017,45(5):109−114.

    DING Baichuan. Features and prevention countermeasures of major disasters occurred in China coal mine[J]. Coal Science and Technology,2017,45(5):109−114.
    [2]
    虎维岳,田干. 我国煤矿水害类型及其防治对策[J]. 煤炭科学技术,2010,38(1):92−96.

    HU Weiyue,TIAN Gan. Mine water disaster type and prevention and control countermeasures in China[J]. Coal Science and Technology,2010,38(1):92−96.
    [3]
    董书宁,虎维岳. 中国煤矿水害基本特征及其主要影响因素[J]. 煤田地质与勘探,2007,35(5):34−38. doi: 10.3969/j.issn.1001-1986.2007.05.009

    DONG Shuning,HU Weiyue. Basic characteristics and main controlling factors of coal mine water hazard in China[J]. Coal Geology & Exploration,2007,35(5):34−38. doi: 10.3969/j.issn.1001-1986.2007.05.009
    [4]
    石必明,俞启香,周世宁. 保护层开采远距离煤岩破裂变形数值模拟[J]. 中国矿业大学学报,2004,33(3):259−263. doi: 10.3321/j.issn:1000-1964.2004.03.006

    SHI Biming,YU Qixiang,ZHOU Shining. Numerical simulation of far-distance rock strata failure and deformation caused by mining protecting stratum[J]. Journal of China University of Mining & Technology,2004,33(3):259−263. doi: 10.3321/j.issn:1000-1964.2004.03.006
    [5]
    LIU H , ZHANG Y. Numerical simulation of the failure process and mechanical behavior of a rock material with nonpersistent cracks under compression[J]. Arabian Journal For Science And Engineering 2018,43, 3673–3683.
    [6]
    祝凌甫,闫少宏. 大采高综放开采顶煤运移规律的数值模拟研究[J]. 煤矿开采,2011,16(1):11−13,40.

    ZHU Lingfu,YAN Shaohong. Numerical simulation of top-coal movement rule in fully-mechanized caving mining with large mining height[J]. Coal Mining Technology,2011,16(1):11−13,40.
    [7]
    刘红元,刘建新,唐春安. 采动影响下覆岩垮落过程的数值模拟[J]. 岩土工程学报,2001,23(2):201−204. doi: 10.3321/j.issn:1000-4548.2001.02.015

    LIU Hongyuan,LIU Jianxin,TANG Chunan. Numerical simulation of failure process of overburden rock strata caused by mining excavation[J]. Chinese Journal of Geotechnical Engineering,2001,23(2):201−204. doi: 10.3321/j.issn:1000-4548.2001.02.015
    [8]
    BELYTSCHKO T,BLACK T. Elastic crack growth in finite elements with minimal remeshing[J]. International Journal for Numerical Methods in Engineering,1999,45(5):601−620. doi: 10.1002/(SICI)1097-0207(19990620)45:5<601::AID-NME598>3.0.CO;2-S
    [9]
    杨贵. 综放开采导水裂隙带高度及预测方法研究[D]. 青岛:山东科技大学,2005.

    YANG Gui. Study on the height of water flowing fractured zone and prediction method in fully mechanized sub-level caving[D]. Qingdao:Shandong University of Science and Technology,2005.
    [10]
    张吉雄. 矸石直接充填综采岩层移动控制及其应用研究[D]. 徐州:中国矿业大学,2008.

    ZHANG Jixiong. Study on strata movement controlling by raw waste backfilling with fully-mechanized coal winning technology and its engineering applications[D]. Xuzhou:China University of Mining and Technology,2008.
    [11]
    李曌,王金安. 金沙河下采煤地表移动变形与导水裂隙带高度预测分析[J]. 中国矿业,2012,21(8):120−124. doi: 10.3969/j.issn.1004-4051.2012.08.032

    LI Zhao,WANG Jinan. Predictive analysis of ground deformation and water flowing fracture height mining under Jinsha River[J]. China Mining Magazine,2012,21(8):120−124. doi: 10.3969/j.issn.1004-4051.2012.08.032
    [12]
    周昊楠. 均质/非均质岩石热力学特性的离散元模拟与试验研究[D]. 西安:西安建筑科技大学,2023.

    ZHOU Haonan. Simulation study on mechanical properties of heterogeneous composite rock and discrete element method[D]. Xi’an:Xi’an University of Architecture and Technology,2023.
    [13]
    刘卫群,唐珺,蔺海晓. 渗流随机有限元程序设计及煤层顶板涌水预测[J]. 辽宁工程技术大学学报(自然科学版),2012,31(3):310−314.

    LIU Weiqun,TANG Jun,LIN Haixiao. Stochastic finite element program of seepage and application in foresting water burst at coal seam roof[J]. Journal of Liaoning Technical University (Natural Science),2012,31(3):310−314.
    [14]
    吴雪峰. 含砂层开采顶板突水溃砂机理的细观数值模拟研究[J]. 陕西煤炭,2017,36(1):65−68. doi: 10.3969/j.issn.1671-749X.2017.01.017

    WU Xuefeng. Microscopic numerical simulation study on the mechanism of water and sand inrush from roof in the sand contained layer mining[J]. Shaanxi Coal,2017,36(1):65−68. doi: 10.3969/j.issn.1671-749X.2017.01.017
    [15]
    杨天鸿,唐春安,刘红元,等. 承压水底板突水失稳过程的数值模型初探[J]. 地质力学学报,2003,9(3):281−288.

    YANG Tianhong,TANG Chunan,LIU Hongyuan,et al. Numerical model of the instability-failure process of the coal-bed floor due to confined water inrush[J]. Journal of Geomechanics,2003,9(3):281−288.
    [16]
    丁其乐. 端帮压煤井工开采覆岩运动规律及控制研究[D]. 徐州:中国矿业大学,2018.

    DING Qile. Overlying strata movement law and control of underground mining in end slope[D]. Xuzhou:China University of Mining and Technology,2018.
    [17]
    李浩,白海波,马立强,等. 双系煤层采动导水裂隙演化规律的 FDEM耦合模拟研究[J]. 煤炭学报,2022,47(12):4443−4454.

    LI Hao,BAI Haibo,MA Liqiang,et al. Research on the evolution law of water flowing fractures in the Jurassic and Carboniferous coal seams based on FDEM simulation[J]. Journal of China Coal Society,2022,47(12):4443−4454.
    [18]
    BENZEGGAGH M L,KENANE M. Measurement of mixed-mode delamination fracture toughness of unidirectional glass/epoxy composites with mixed-mode bending apparatus[J]. Composites Science and Technology,1996,56(4):439−449. doi: 10.1016/0266-3538(96)00005-X
    [19]
    路德春, 杜修力, 闫静茹, 等. 混凝土材料三维弹塑性本构模型[J]. 中国科学: 技术科学,2014,44(8):847−860.

    LU Dechun, DU Xiuli, YAN Jingru, et al. A three-dimensional elastoplastic constitutive model for concrete[J]. Scientia Sinica (Technologica),2014,44(8):847−860.
    [20]
    Ladanyi B ,Archambault G . Direct and indirect determination of shear strength or roch mass[C]//AIME Annual Meeting,Las Vegas,Preprint. 1980(80−25):16.
    [21]
    李晓杰,闫鸿浩,王小红,等. Mie-Grüneisen状态方程的物理力学释义[J]. 高压物理学报,2014,28(2):227−231.

    LI Xiaojie,YAN Honghao,WANG Xiaohong,et al. A physical mechanics paraphrase on Mie-grüneisen equation of state[J]. Chinese Journal of High Pressure Physics,2014,28(2):227−231.
    [22]
    华解明. “大井法” 预测矿井涌水量问题探讨[J]. 中国煤炭地质,2009,21(6):45−47.

    HUA Jieming. Questioning on mine water inflow “virtual large diameter well” method prediction[J]. Coal Geology of China,2009,21(6):45−47.
  • Cited by

    Periodical cited type(3)

    1. 王香增,党海龙,张亮,张建锋,王世玉,张景涛. 融合三维地理信息的数智化油气勘探开发——延长石油的实践与展望. 钻采工艺. 2025(01): 121-129 .
    2. 杨永钊,周进生,胡海文,郭春雨,罗淼木,马江波,郭飞,黄子容. CCUS-EOR产业的发展现状、经济效益与未来展望. 中国矿业. 2025(02): 190-203 .
    3. 芮振华,曾联波,Birol Dindoruk. 大规模部署碳捕集、利用与封存面临的挑战(英文). Engineering. 2025(01): 17-20 .

    Other cited types(0)

Catalog

    Article views (84) PDF downloads (30) Cited by(3)
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return