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| NUMERICAL SIMULATION OF ACOUSTIC EMISSION FOR
DEFECTIVE ROCK |
| HAN Tongchun1，2，ZHANG Jie1，2 |
(1. Research Center of Coastal and Urban Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；
2. Key Laboratory of Soft Soils and Geoenvironmental Engineering，Ministry of Education，Zhejiang University，
Hangzhou，Zhejiang 310058，China) |
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Abstract Rock is a heterogeneous material which consists of grains with different strengths. Studies show that different homogeneous rock materials possess different acoustic emission characteristics in uniaxial compression. Researches of these characteristics have an important role in forecasting rockburst. Fish function is drew to realize model which contains random defect units and records events of acoustic emission. Acoustic emission on homogeneous and random defective material in uniaxial compression is simulated with FLAC3D. The differences of homogeneous model and defective model are discussed，as well as the influence of number of defective units on acoustic emission. Results have an important significance for study of rock acoustic emission characteristics.
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Received: 22 December 2012
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| [1] 王牛俊，陈 莉. 声发射检测技术的原理及应用[J]. 广西轻工业，2010，136(3)：49–50.(WANG Niujun，CHEN Li. The principle and application of testing technology of acoustic emission[J]. Guangxi Journal of Light Industry，2010，136(3)：49–50.(in Chinese))
[2] 吴永胜，余贤斌. 单轴压缩条件下岩石声发射特性的实验研究[J].金属矿山，2008，(10)：25–28.(WU Yongsheng，YU Xianbin. Experimental study on the acoustic emission characteristics of rocks at uniaxial compression[J]. Metal Mine，2008，(10)：25–28.(in Chinese))
[3] 尹贤刚，李庶林. 岩石受载破坏前兆特征–声发射平静研究[J]. 金属矿山，2007，(7)：124–128.(YIN Xiangang，LI Shulin. Study on acoustic emission quietude-omen characteristic of failure of compressed rock[J]. Metal Mine，2007，(7)：124–128.(in Chinese))
[4] 樊军伟，唐礼忠. 声发射率和能率在岩石失稳破坏预测中的应用[J].金属矿山，2010，409(7)：140–142.(FAN Junwei，TANG Lizhong. Application of acoustic emission rate and energy rate in rock failure[J]. Metal Mine，2010，409(7)：140–142.(in Chinese))
[5] TANG C A，KAISER P K. Numerical simulation of damage accumulation and seismic energy release in unstable failure of brittle rock. Part I：fundamentals[J]. International Journal of Rock Mechanics and Mining Sciences，1998，35(2)：113–121.
[6] MAA G W，WANGB X J，RENB F. Numerical simulation of compressive failure of heterogeneous rock-like materials using SPH method[J]. International Journal of Rock Mechanics and Mining Sciences，2011，48(3)：353–363.
[7] 赵 康，王金安，赵 奎. 岩石高径比效应对其声发射影响的数值模拟研究[J]. 矿业研究与开发，2010，30(1)：15–18.(ZHAO Kang，WANG Jin?an，ZHAO Kui. Numerical simulation of the influence of height-to-diameter ratio effect on Acoustic Emission of rock[J]. Mining Research and Development，2010，30(1)：15–18.(in Chinese))
[8] 赵 康，贾群燕，赵 奎，等. 岩石端部效应对其声发射影响的数值模拟研究[J]. 矿业研究与开发，2008，28(1)：13–15.(ZHAO Kang，JIA Qunyan，ZHAO Kui. Numerical studies of the influence of end effect on rock acoustic emission[J]. Mining Research and Development，2008，28(1)：13–15.(in Chinese))
[9] 叶金铎，陆远忠，蒋 淳. 含硬包体岩石破裂演化过程的声发射数值模拟[J]. 天津理工学院学报，2004，20(4)：1–5.(YE Jinduo，LU Yuanzhong，JIANG Chun. The numerical modeling of acoustic emission to the processes of rock damaged and evolution with high velocity body[J]. Journal of Tianjin Institute of Technology，2004，20(4)：1–5.(in Chinese))
[10] 包春燕，姜谙男，唐春安，等. 单轴加卸载扰动下石灰岩声发射特性研究[J]. 岩石力学与工程学报，2011，30(2)：3 871–3 877.(BAO Chunyan，JIANG Annan，TANG Chun?an，et al. Study of acoustic emission characteristics of limestone under cycle uniaxial loading- unloading perturbation[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(2)：3 871–3 877.(in Chinese))
[11] 宿 辉，党承华，李彦军. 考虑不均质度的岩石声发射数值模拟研究[J]. 岩土力学，2011，32(6)：1 886–1 890.(SU Hui，DANG Chenghua，LI Yanjun. Study of numerical simulation of acoustic emission in rock of inhomogeneity[J]. Rock and Soil Mechanics，2011，32(6)：1 886–1 890.(in Chinese))
[12] 王学滨. 初始黏聚力及摩擦角对岩样全部变形特征的影响[J]. 沈阳建筑大学学报：自然科学版，2005，21(5)：472.(WANG Xuebin. Effects of initial cohesions and friction angles on entire deformational characteristics of rock specimen[J]. Journal of Shenyang Jianzhu University：Nature Science，2005，21(5)：472.(in Chinese))
[13] 王学滨. 材料缺陷对岩样变形局部化影响的数值模拟[J]. 岩土力学，2006，27(6)：1 241–1 247.(WANG Xuebin. Numerical simulation of influence of material imperfection on strain localization[J]. Rock and Soil Mechanics，2006，27(6)：1 241–1 247.(in Chinese))
[14] 王学滨. 不同强度岩石的破坏过程及声发射数值模拟[J]. 北京科技大学学报，2008，30(8)：337–343.(WANG Xuebin. Numerical simulation of failure processes and acoustic emissions of rock specimens with different strengths[J]. Journal of University of Science and Technology Beijing，2008，30(8)：337–343.(in Chinese))
[15] 王学滨. 缺陷数目对岩样声发射及应变能降低的影响[J]. 中国有色金属学报，2008，18(8)：1 541–1 549.(WANG Xuebin. Influence of imperfection number on acoustic emissions and elastic strain energy decrease of rock specimens with initially random imperfections[J]. The Chinese Journal of Nonferrous Metals，2008，18(8)：1 541–1 549.(in Chinese))
[16] 王学滨. 强度参数对初始随机缺陷岩样全部变形的影响[J]. 地质力学学报，2009，15(4)：321–328.(WANG Xuebin. Influence of strength parameters on overall deformations of rock specimens with initially random material imperfections[J]. Journal of Geomechanics，2009，15(4)：321–328.(in Chinese))
[17] 唐春安. 岩石声发射规律数值模拟初探[J]. 岩石力学与工程学报，1997，16(4)：368–374.(TANG Chun?an. Numerical simulation of AE in rock failure[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(4)：368–374.(in Chinese))
[18] 姜永东，鲜学福，尹光志，等. 岩石应力应变全过程的声发射及分形与混沌特征[J]. 岩土力学，2010，31(8)：2 413–2 418.(JIANG Yongdong，XIAN Xuefu，YIN Guangzhi，et al. Acoustic emission，fractal and chaos characters in rock stress-strain procedure[J]. Rock and Soil Mechanics，2010，31(8)：2 413–2 418.(in Chinese))
[19] 刘建新. 岩石破裂声发射实验研究[硕士学位论文][D]. 哈尔滨：中国地震局地球物理研究所，2007.(LIU Jianxin. Experimental study of AE in rocks[M. S. Thesis][D]. Harbin：Institute of Geophysics，China Earthquake Administration，2007.(in Chinese))
[20] 徐东强，周昌达，许昭永. 岩石试件刚度及压力机刚度对岩石主破裂前声发射相对平静的影响[J]. 地震研究，1994，17(8)：802–807. (XU Dongqiang，ZHOU Changda，XU Zhaoyong. Influence of rigidity of rock sample and pressure machine on relative quiet of acoustic emission prior to main rupture in rock[J]. Journal of Seismological Research，1994，17(8)：802–807.(in Chinese))
[21] 张 茹，谢和平，刘建锋，等. 单轴多级加载岩石破坏声发射特性试验研究[J]. 岩石力学与工程学报，2006，25(12)：2 584–2 588. (ZHANG Ru，XIE Heping，LIU Jianfeng，et al. Experimental study on acoustic emission characteristics[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 584–2 588.(in Chinese))
[22] 曹树刚，刘延保，张立强. 突出煤体变形破坏声发射特征的综合分析[J]. 岩石力学与工程学报，2007，26(增1)：2 794–2 799.(CAO Shugang，LIU Yanbao，ZHANG Liqiang. Study on characteristics of acoustic emission in outburst coal[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 794–2 799.(in Chinese))
[23] 王善勇，唐春安，徐 涛，等. 矿柱岩爆过程声发射的数值模拟[J].中国有色金属学报，2003，13(2)：754–759.(WANG Shanyong，TANG Chun?an，XU Tao，et al. Numerical simulation on acoustic emission during pillar rock burst[J]. The Chinese Journal of Nonferrous Metals，2003，13(2)：754–759.(in Chinese))
[24] 梁正召，唐春安，杨天鸿，等. 含弱层岩石破裂前兆规律的数值模拟分析[J]. 地震，2003，23(3)：65–70.(LIANG Zhengzhao，TANG Chun?an，YANG Tianhong，et al. Numerical simulation of precursory phenomenon before fracture of rocks containing incompetent layer[J]. Earthquake，2003，23(3)：65–70.(in Chinese)) |
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2014, Vol. 33 
