节理岩体裂隙扩展过程一种新改进的弹脆性模拟方法及应用

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摘要通过改进原有的FLAC3D本构关系为弹脆性本构，并采用超细单元划分法，模拟和研究双裂隙岩石试件在单轴、双轴加载作用下的破坏过程。数值计算结果与前人试验所得到的相应结果具有良好的一致性。用此方法还模拟了4条2组不同倾向裂隙的破裂过程和椭圆形三维单裂隙的扩展过程，且三维数值模拟结果与前人试验也有很好一致性。最后，将该模型引入到某边坡开挖工程的裂隙扩展过程研究和稳定性分析中，取得较好效果。

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关键词 ：岩石力学, 节理岩体, 裂隙扩展, 弹脆性模型, 数值模拟, 边坡稳定

Abstract：By improving the original constitutive relation of FLAC3D to the elastic-brittle model，as well as using superfine elements division，the failure process of the double-cracked rock specimen under uniaxial and biaxial compression are simulated and studied. The numerical results match well with the testing results obtained by early studies. This method is also used to simulate the failure process of rocks that contain four cracks (in two groups) of different inclinations or a single 3D crack；meanwhile，the numerical results of 3D crack propagation also match well with the testing results obtained by early studies. Finally，the model is applied to studying the crack propagation process and stability of a slope project；and it has a good effect.

Key words： rock mechanics jointed rock mass crack propagation elastic-brittle model numerical simulation slope stability

收稿日期: 2012-04-10

引用本文:

付金伟，朱维申，王向刚，薛伟强. 节理岩体裂隙扩展过程一种新改进的弹脆性模拟方法及应用[J]. 岩石力学与工程学报, 2012, 31(10): 2088-2095.
FU Jinwei，ZHU Weishen，WANG Xianggang，XUE Weiqiang. AN IMPROVED ELASTIC-BRITTLE SIMULATION METHOD OF CRACK PROPAGATION PROCESS IN JOINTED ROCK MASS AND ITS APPLICATION. , 2012, 31(10): 2088-2095.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I10/2088

[4]	RAMAMURTHY T. Shear strength response of some geological materials in triaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(4)：683-697. " target="_blank">
[7]	TANG C A，LIN P，Wong R H C，et al. Analysis of crack coalescence in rock-like materials containing three flaws—part II：numerical approach[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(7)：925-936. " target="_blank">
[8]	WONG R H C，TANG C A，et al. Splitting failure in brittle rocks containing pre-existing flaws under uniaxial compression[J]. Engineering Fracture Mechanics，2002，69(17)：1 853-1 871. " target="_blank">
[10]	朱维申，陈卫忠，申晋. 雁形裂纹扩展的模型试验及断裂力学机制研究[J]. 固体力学学报，1998，19(4)：355-360.(ZHU Weishen，CHEN Weizhong，SHEN Jin. Simulation experiment and fracture mechanism study on propagation of echelon pattern cracks[J]. Acta Mechanica Solida Sinica，1998，19(4)：355-360.(in Chinese))
[12]	郭少华. 岩石类材料压缩断裂的实验与理论研究[博士学位论文][D]. 长沙：中南大学，2003：11-89.(GUO Shaohua. Experimental and theoretical study on fracture of rock-like material under compressive loading[Ph. D. Thesis][D]. Changsha：Central South University，2003：11-89.(in Chinese)) " target="_blank">
[13]	焦玉勇，张秀丽，李廷春. 模拟节理岩体破坏全过程的DDARF方法[M]. 北京：科学出版社，2010：87-100.(JIAO Yuyong，ZHANG Xiuli，LI Tingchun. Simulation of the failure process of jointed rock mass by DDARF method[M]. Beijing：Science Press，2010：87-100. (in Chinese)) " target="_blank">
[14]	蒲成志，曹平，赵延林，等. 单轴压缩下多裂隙类岩石材料强度试验与数值分析[J]. 岩土力学，2010，31(11)：3 661-3 666.(PU Chengzhi，CAO Ping，ZHAO Yanlin，et al. The numerical analysis and strength experiment of rock-like material with multi-fissures under uniaxial compression[J]. Rock and Soil Mechanics，2010，31(11)：3 661-3 666.(in Chinese))
[15]	陈育民，徐鼎平. FLAC/FLAC3D基础与工程实例[M]. 北京：中国水利水电出版社，2009：115-123.(CHEN Yumin, XU Dingping. The basics and engineering examples of FLAC/FLAC3D[M]. Beijing：China Water Power Press，2009：115-123.(in Chinese)) " target="_blank">
[16]	DYSKIN A V，SAHOURYEH E，JEWELL R J，et al. Influence of shape and locations of initial 3D cracks on their growth in uniaxial compression[J]. Engineering Fracture Mechanics，2003，70(15)：2 115-2 136. " target="_blank">
[17]	刘杰，郑涛，李建林，等. 有限元重力比例自动加载法与强度折减法对比研究[J]. 土木工程学报，2008，41(10)：66-72.(LIU Jie，ZHENG Tao，LI Jianlin，et al. A comparative study of gravity reduction FEM and strength reduction FEM[J]. China Civil Engineering Journal，2008，41(10)：66-72.(in Chinese)) " target="_blank">
[3]	NEMAT-NASSER S，OBATA M M. A microcrack model of dilatancy in brittle material[J]. Journal of Applied Mechanics，1988，55(2)：24-35. " target="_blank">
[9]	HUANG M L，WONG R H C，WANG S Y，et al. Numerical studies of the influence of heterogeneity on rock failure with pre-existing crack in uniaxial compression[J]. Key Engineering Materials，2004， 261-263(II)：1 557-1 562. " target="_blank">
[5]	BOBET A，EINSTEIN H H. Fracture coalescence in rock-type materials under uniaxial and biaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，1998，35(7)：863-888. " target="_blank">
[11]	黄凯珠，林鹏，唐春安，等. 双轴加载下断续预置裂纹贯通机制的研究[J]. 岩石力学与工程学报，2002，21(6)：808-816.(WANG Kaizhu，LIN Peng，TANG Chun?an，et al. Mechanisms of crack coalescence of pre-existing flaws under biaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：808-816.(in Chinese))
[1]	ASHBY M F，HALLAM S D. The failure of brittle solids containing small cracks under compressive stress[J]. Acta Metall，1986，34(3)：497-510. " target="_blank">
[2]	HORII H，NEMAT-NASSER S. Brittle failure in compression：splitting and brittle-ductile transition[J]. Philosophical Transactions of the Royal Society of London，Series A，1986，319(2)：337-374. " target="_blank">
[6]	TANG C A，ZHU W C，YANG T H. Influence of heterogeneity on crack propagation mode in brittle rock under static load[C]// Proceedings of Development and Application of Discontinuous Modelling for Rock Engineering. Rotterdam：Balkema Publishers，2003：33-38. " target="_blank">