Implementation of shear broken failure of bolts in FLAC3D and its application
SONG Yuanba1，2，YAN Shuai1，BAI Jianbiao1，2，HAO Shengpeng1，2，CHEN Yong2
(1. School of Mines，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China；2. State Key Laboratory of Coal Resources and Safe Mining，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China)
Abstract：The shear broken failure of bolts cannot usually be simulated with the FLAC3D. A broken criterion Fs(i)≥Fsmax(i) was thus proposed based on the PILE element. The modified mechanical model of PILE element was established and embedded into FLAC3D. The direct shear tests of bolts and the bolt supporting tests of roadway with coal-rock interface slippage were simulated respectively with original and modified mechanical model of PILE element. The shear load-displacement curve with the modified model presented the shear broken failure characteristics，and the quantitative broken effect was achieved through the shear force judgement. The shear and axial forces of the failed elements of the bolts dropped to zero when the shear broken failure occurred，consequently the shear broken failure of bolt was realized in FLAC3D. In the bolt support with the modified model，the shear broken failure occurred at the bolts around the coal-rock interface，and the bolts at the coal-floor interface failed earlier than those at the coal-roof interface. The greatest calculated displacement at the coal-rock interface with the modified model was 17.5 mm larger than that with the original model，and the result was more realistic. Overall，the range of application of FLAC3D was extended with the implementation of shear broken failure of PILE element with the modified model.
宋远霸1，2，闫 帅1，柏建彪1，2，郝胜鹏1，2，陈 勇2. FLAC3D中锚杆剪切破断失效的实现及应用[J]. 岩石力学与工程学报, 2017, 36(8): 1899-1909.
SONG Yuanba1，2，YAN Shuai1，BAI Jianbiao1，2，HAO Shengpeng1，2，CHEN Yong2. Implementation of shear broken failure of bolts in FLAC3D and its application. , 2017, 36(8): 1899-1909.
[1] 程良奎. 岩土锚固研究与新进展[J]. 岩石力学与工程学报，2005，24(21)：3 803–3 811.(CHENG Liangkui. Research and new progress in ground anchorage[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(21)：3 803–3 811.(in Chinese))
[2] RANJBARNIA M，FAHIMIFAR A，ORESTE P. Practical method for the design of pretensioned fully grouted rockbolts in tunnels[J]. International Journal of Geomechanics，2016，16(1)：1–12.
[3] NGUYEN T，GHABRAIE K，TRAN-CONG T. Simultaneous pattern and size optimisation of rock bolts for underground excavations[J]. Computers and Geotechnics，2016，66：264–277.
[4] 王金华. 我国煤巷锚杆支护技术的新发展[J]. 煤炭学报，2007，32(2)：113–118.(WANG Jinhua. New development of rock bolting technology for coal roadway in China[J]. Journal of China Coal Society，2007，32(2)：113–118.(in Chinese))
[5] 何满潮. 深部软岩工程的研究进展与挑战[J]. 煤炭学报，2014，39(8)：1 409–1 417.(HE Manchao. Progress and challenges of soft rock engineering in depth[J]. Journal of China Coal Society，2014，39(8)：1 409–1 417.(in Chinese))
[6] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))
[7] 单仁亮，孔祥松，蔚振廷，等. 煤巷强帮支护理论与应用[J]. 岩石力学与工程学报，2013，32(7)：1 304–1 314.(SHAN Renliang，KONG Xiangsong，WEI Zhenting，et al. Theory and application of strong support for coal roadway sidewall[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(7)：1 304–1 314.(in Chinese))
[8] 殷帅峰，程根银，何富连，等. 基于基本顶断裂位置的综放窄煤柱煤巷非对称支护技术研究[J]. 岩石力学与工程学报，2016，35(增1)：3 162–3 174.(YIN Shuaifeng，CHENG Genyin，HE Fulian，et al. An asymmetric support technique for fully-mechanized coal roadway nearby narrow pillar based on the fracture position analysis in basic roof[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.1)：3 162–3 174.(in Chinese))
[9] 肖同强，李怀珍，徐 营，等. 深部构造应力区煤巷肩角锚杆破断机制及控制[J]. 岩土力学，2013，34(8)：2 303–2 308.(XIAO Tongqiang，LI Huaizhen，XU Ying，et al. Breaking mechanism of shoulder bolt of deep coal roadway in tectonic stress area and its control[J]. Rock and Soil Mechanics，2013，34(8)：2 303–2 308.(in Chinese))
[10] 缪协兴，茅献彪，朱川曲，等. 综放沿空巷道顶部锚杆剪切变形分析[J]. 煤炭学报，2005，30(6)：681–684.(MIAO Xiexing，MAO Xianbiao，ZHU Chuanqu，et al. Analysis on shearing deformation of roof support bolt in gob-side entry of fully-mechanized caving face[J]. Journal of China Coal Society，2005，30(6)：681–684.(in Chinese))
[11] 刘金海，孙广京，谭文峰. 深埋巷道锚杆破断失效机制[J]. 湖南科技大学学报：自然科学版，2015，30(2)：8–13.(LIU Jinhai，SUN Guangjing，TAN Wenfeng. Mechanism of bolt breaking in deep roadway[J]. Journal of Hunan University of Science and Technology：Natural Science，2015，30(2)：8–13.(in Chinese))
[12] 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，2013：164–170.(CHEN Yumin，XU Dingping. FLAC/FLAC3D basis and engineering example[M]. Beijing：China Water Power Press，2013：164–170.(in Chinese))
[13] Itasca Consulting Group Inc. Fast language analysis of continua in 3 dimensions(version 5.0)[M]. [S.l.]：Itasca Consulting Group，Inc.，2012：79–87.
[14] 郑文华，刘德军. 基于FLAC3D二次开发的不连续变形模拟方法探讨[J]. 岩土工程学报，2013，35(增1)：197–202.(ZHENG Wenhua，LIU Dejun. Discussion of discontinuous deformation simulation method based on secondary development of FLAC3D[J]. Chinese Journal of Geotechnical Engineering，2013，35(Supp.1)：197–202.(in Chinese))
[15] 何利军，吴文军，孔令伟. 基于FLAC3D含SMP强度准则黏弹塑性模型的二次开发[J]. 岩土力学，2012，33(5)：1 549–1 556.(HE Lijun，WU Wenjun，KONG Lingwei. Secondary development of viscoelasto-plastic model with SMP strength criterion in FLAC3D[J]. Rock and Soil Mechanics，2012，33(5)：1 549–1 556.(in Chinese))
[16] 褚卫江，徐卫亚，杨圣奇，等. 基于FLAC3D岩石黏弹塑性流变模型的二次开发研究[J]. 岩土力学，2006，27(11)：2 005–2 010. (CHU Weijiang，XU Weiya，YANG Shengqi，et al. Secondary development of a viscoelasto-plastic rheological constitutive model of rock based on FLAC3D[J]. Rock and Soil Mechanics，2006，27(11)：2 005–2 010.(in Chinese))
[17] 李英杰，张顶立，刘保国. 考虑变形模量劣化的应变软化模型在FLAC3D中的开发与验证[J]. 岩土力学，2011，32(增2)：647–659. (LI Yingjie，ZHANG Dingli，LIU Baoguo. Development and verification of strain-softening model considering deformation modulus degradation in FLAC3D[J]. Rock and Soil Mechanics，2011，32(Supp.2)：647–659.(in Chinese))
[18] 漆泰岳，陆士良，高 波. FLAC 锚杆单元模型的修正及其应用[J]. 岩石力学与工程学报，2004，23(13)：2 197–2 200.(QI Taiyue，LU Shiliang，GAO Bo. Amended model of bolt element in FLAC and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(13)：2 197–2 200.(in Chinese))
[19] MA S，ZHAO Z，NIE W，et al. A numerical model of fully grouted bolts considering the tri-linear shear bond–slip model[J]. Tunnelling and Underground Space Technology，2016，54：73–80.
[20] NEMCIK J，MA S，AZIZ N，et al. Numerical modeling of failure propagation in fully grouted rockbolts subjected to tensile load[J]. International Journal of Rock Mechanics and Mining Sciences，2014，71：293–300.
[21] 李为腾，杨 宁，李廷春，等. FLAC3D中锚杆破断失效的实现及应用[J]. 岩石力学与工程学报，2016，35(4)：753–767.(LI Weiteng，YANG Ning，LI Tingchun，et al. Implementation of bolt broken failure in FLAC3D and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(4)：753–767.(in Chinese))
[22] LI X，AZIZ N，MIRZAGHORBANALI A，et al. Behavior of fiber glass bolts，rock bolts and cable bolts in shear[J]. Rock Mechanics and Rock Engineering，2016，49(7)：2 723–2 735.
[23] 康红普，王金华. 煤巷锚杆支护理论与成套技术[M]. 北京：煤炭工业出版社，2007：14.(KANG Hongpu，WANG Jinhua. Rock bolting theory and complete technology for coal roadways[M]. Beijing：China Coal Industry Publishing House，2007：14.(in Chinese))
[24] 康红普，林 健，吴拥政，等. 锚杆构件力学性能及匹配性[J]. 煤炭学报，2015，40(1)：11–23.(KANG Hongpu，LIN Jian，WU Yongzheng，et al. Mechanical performances and compatibility of rock bolt components[J]. Journal of China Coal Society，2015，40(1)：11–23.(in Chinese))
2017, Vol. 36 
