基于刚体弹簧–等效离散裂隙网络耦合方法的水压致裂数值模型

doi:10.13722/j.cnki.jrme.2017.1231

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摘要提出一种模拟二维非稳定渗流过程的等效离散裂隙网络模型。在此基础上，结合改进刚体弹簧方法，通过引入考虑断裂能的渐进拉裂破坏准则，建立一种新的水压致裂过程数值计算模型。应力、变形、裂隙扩展过程计算采用改进刚体弹簧方法，非稳定渗流计算采用等效离散裂隙网络模型。为模拟等效的宏观渗透特性，给出细观渗流参数的确定方法，通过与一维非稳定渗流解析解的对比，验证等效离散裂隙网络模型的适用性。给出改进弹簧方法和等效离散裂隙网络水力耦合模型的计算流程，通过与弹性稳定流条件下厚壁圆筒的解析解对比，验证弹性稳定流条件下水力耦合计算格式的正确性。通过厚壁圆筒水压致裂算例验证所给模型模拟水压致裂过程的能力。与同类格子模型的对比，证明该模型的优越性。

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	姚池1
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	杨建华1
	蒋水华1
	姜清辉1
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	周创兵1

关键词 ：岩石力学, 水压致裂, 刚体弹簧方法, 裂隙扩展, 水力耦合

Abstract：An equivalent discrete fracture network model to simulate two-dimensional unsteady seepage process is proposed. On this basis，a new numerical model of hydraulic fracturing process is established by introducing the progressive failure criterion of fracturing energy and the extended rigid-body spring method. The processes of stress，deformation and crack propagation are simulated with the extended rigid body spring method，while the unsteady seepage problem is solved with the equivalent discrete fracture network model. To obtain the equivalent macroscopic permeability characteristics，a method is used to determine the mesoscopic seepage parameters. The applicability of the equivalent discrete fracture network model is verified through comparison with the analytical solution of a one-dimensional unsteady seepage problem. The hydro-mechanical coupling procedure is deduced through combination of the extended rigid spring method with the equivalent discrete fracture network model. The coupling method is verified by comparing with the elastic analytical solutions of thick wall cylinder under the condition of steady flow. An example is given to demonstrate the capability of the model to simulate the hydraulic fracturing process. The comparison with similar lattice model proves the superiority of the proposed model.

Key words： rock mechanics hydraulic fracturing RBSM crack propagation hydro-mechanical coupling

引用本文:

姚池1，赵明1，杨建华1，蒋水华1，姜清辉1，2，周创兵1. 基于刚体弹簧–等效离散裂隙网络耦合方法的水压致裂数值模型[J]. 岩石力学与工程学报, 2018, 37(6): 1438-1445.
YAO Chi1，ZHAO Ming1，YANG Jianhua1，JIANG Shuihua1，JIANG Qinghui1，2，ZHOU Chuangbing1. A coupled RBSM-DFN model for simulating hydraulic fracturing. , 2018, 37(6): 1438-1445.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.1231 或 http://www.rockmech.org/CN/Y2018/V37/I6/1438

[16]	ZHANG X. Slope stability analysis based on the rigid finite element method[J]. Geotechnique，1999，49(5)：585-593.
[15]	QIAN L X，XHANG X. Rigid finite element and its applications in engineering[J]. Acta Mechanica Sinica，1995，11(1)：44-50.
[7]	CHOO L Q，ZHAO Z，CHEN H，et al. Hydraulic fracturing modeling using the discontinuous deformation analysis(DDA) method[J]. Computers and Geotechnics，2016，76：12-22.
[8]	JIAO Y Y，ZHANG H Q，ZHANG X L，et al. A two-dimensional coupled hydromechanical discontinuum model for simulating rock hydraulic fracturing[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2015，39(5)：457-481.
[18]	卓家寿，赵宁. 不连续介质静，动力分析的刚体—弹簧元法[J]. 河海大学学报：自然科学版，1993，21(5)：34-43.(ZHUO Jiashou，ZHAO Ning. Piecewise rigid body-interface spring method for problems of medium[J]. Journal of Hohai University：Natural Science，1993，21(5)：34-43.(in Chinese))
[2]	YAN C，ZHENG H. A two-dimensional coupled hydro-mechanical finite-discrete model considering porous media flow for simulating hydraulic fracturing[J]. International Journal of Rock Mechanics and Mining Sciences，2016，88(10)：115-128.
[11]	KAWAI T. New element models in discrete structural analysis[J]. Journal of the Society of Naval Architects of Japan，1977，1977(141)：174-180.
[12]	BOLANDER J E，BERTON S. Simulation of shrinkage induced cracking in cement composite overlays[J]. Cement and Concrete Composites，2004，26(7)：861-871.
[14]	UEDA T，HASAN M，NAGAI K，et al. Mesoscale simulation of influence of frost damage on mechanical properties of concrete[J]. Journal of Materials in Civil Engineering，2009，21(6)：244-252.
[22]	YAO C，JIANG Q H，SHAO J F. Numerical simulation of damage and failure in brittle rocks using a modified rigid block spring method[J]. Computers and Geotechnics，2015，64：48-60.
[24]	YAO C，JIANG Q H，SHAO J F. A numerical analysis of permeability evolution in rocks with multiple fractures[J]. Transport in Porous Media，2015，108(2)：289-311.
[25]	YAO C，SHAO J F，JIANG Q H，et al. Numerical study of excavation induced fractures using an extended rigid block spring method[J]. Computers and Geotechnics，2017，85：368-393.
[1]	严成增，郑宏，孙冠华，等. 模拟水压致裂的二维FDEM-flow方法[J]. 岩石力学与工程学报，2015，34(1)：67-75.(YAN Chengzeng，ZHENG Hong，SUN Guanhua，et al. A 2D FDEM-Flow method for simulation hydraulic fracturing[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：67-75.(in Chinese))
[3]	潘鹏志，冯夏庭，吴红晓，等. 水压致裂过程的弹塑性细胞自动机模拟[J]. 上海交通大学学报，2011，45(5)：722-727.(PAN Pengzhi，FENG Xiating，WU Hongxiao，et al. Simulation of elastoplastic cellular automata in hydraulic fracturing process[J]. Journal of Shanghai Jiaotong University，2011，45(5)：722-727.(in Chinese))
[4]	李根，唐春安，李连崇，等. 水压致裂过程的三维数值模拟研究[J]. 岩土工程学报，2010，32(12)：1 875-1 881.(LI Gen，TANG Chun?an，LI Liancong，et al. Research on three-dimensional numerical simulation of hydraulic fracturing process[J]. Chinese Journal of Geotechnical Engineering，2010，32(12)：1 875-1 881.(in Chinese))
[5]	李连崇，杨天鸿，唐春安，等. 岩石水压致裂过程的耦合分析[J].岩石力学与工程学报，2003，22(7)：1 060-1 066.(LI Lianchong，YANG Tianhong，TANG Chun?an，et al. Coupling analysis of rock hydraulic fracturing process[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(7)：1 060-1 066.(in Chinese))
[9]	GRASSL P，FAHY C，GALLIPOLI D，et al. On a 2D hydro-mechanical lattice approach for modelling hydraulic fracture[J]. Journal of the Mechanics and Physics of Solids，2015，75(2)：104-118.
[6]	WANG T，ZHOU W，CHEN J，et al. Simulation of hydraulic fracturing using particle flow method and application in a coal mine[J]. International Journal of Coal Geology，2014，121：1-13.
[10]	LISJAK A，KAIFOSH P，HE L，et al. A 2D，fully-coupled，hydro-mechanical，FDEM formulation for modelling fracturing processes in discontinuous，porous rock masses[J]. Computers and Geotechnics，2017，81(1)：1-18.
[20]	姚池，李瑶，姜清辉，等. 应力作用下软硬互层岩石破裂过程的细观模拟[J]. 岩石力学与工程学报，2015，34(8)：1 542-1 551. (YAO Chi，LI Yao，JIANG Qinghui，et al. Mesoscopic model of failure process of interlayered rock under compression[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(8)：1 542- 1 551.(in Chinese))
[26]	姚池，赵明，杨建华，等. 基于改进刚体弹簧方法的二维水压致裂模型[J]. 岩石力学与工程学报，2017，36(9)：2 169-2 176. (YAO Chi，ZHAO Ming，YANG Jianhua，et al. Improved method of rigid body spring for 2D hydraulic fracturing simulation[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(9)：2 169- 2 176.(in Chinese))
[13]	NAGAI K，SATO Y，UEDA T. Mesoscopic simulation of failure of mortar and concrete by 2D RBSM[J]. Journal of Advanced Concrete Technology，2004，2(3)：359-374.
[17]	陈胜宏. 岩体的广义弹黏塑性块体理论[J]. 水利学报，1996，(1)：78-84.(CHEN Shenghong. A general formulation of elastic- viscoplastic block theory of rock masses[J]. Journal of Hydraulic Engineering，1996，(1)：78-84.(in Chinese))
[19]	姚池，姜清辉，邵建富，等. 一种模拟岩石破裂的细观数值计算模型[J]. 岩石力学与工程学报，2013，32(增2)：3 146-3 153.(YAO Chi，JIANG Qinghui，SHAO Jianfu，et al. A mesoscopic numerical model for simulation of rock fracturing[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(Supp.2)：3 146-3 153.(in Chinese))
[21]	姚池，李瑶，姜清辉，等. 基于改进刚体弹簧方法的开挖损伤演化分析[J]. 岩石力学与工程学报，2015，34(10)：1 959-1 966. (YAO Chi，LI Yao，JIANG Qinghui，et al. Numerical simulation of excavation damaged zone using the modified rigid body spring method[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(10)：1 959-1 966.(in Chinese))
[23]	YAO C，JIANG Q H，SHAO J F，et al. A discrete approach for modeling damage and failure in anisotropic cohesive brittle materials[J]. Engineering Fracture Mechanics，2016，155：102-118.
[27]	王媛，颜青青. 岩体水力劈裂非稳定渗流影响机制初探[J]. 岩石力学与工程学报，2012，31(10)：2 016-2 021.(WANG Yuan，YAN Qingqing. Primary research of influence of unsteady seepage processes on hydraulic fracturing in rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(10)，2 016-2 021.(in Chinese))