弹性纵波入射粗糙节理面透射性能研究
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摘要
针对应力波穿过节理面产生的衰减现象,研究节理面的几何形状、法向刚度对应力波的透射性影响。根据节理面几何特性设计6种模拟节理面粗糙程度的节理模型,用UDEC软件模拟一维弹性纵波的入射问题。计算结果表明,节理面的粗糙程度、法向刚度对弹性波的透射系数影响很大,节理面越粗糙,法向刚度越小,弹性波衰减程度越大,弹性波的波速降低越快。
Aiming at the attenuation of stress wave traveling through the rock joints,the influences of joint geometrical shape and stiffness on the stress wave transmission coefficient are analyzed.According to the geometrical shapes,six joint models have been designed to simulate the different rough surfaces of fracture. UDEC is adopted to simulate the wave propagation of single fracture with the six models and different stiffnesses. The modeling results of the transmission coefficient of the fracture models are compared with the theoretical solutions.It reveals that a rough joint surface distinctly affects the stress wave transmission in the jointed rocks compared with a smooth plane joint and decreases the amplitude and velocity.
Aiming at the attenuation of stress wave traveling through the rock joints,the influences of joint geometrical shape and stiffness on the stress wave transmission coefficient are analyzed.According to the geometrical shapes,six joint models have been designed to simulate the different rough surfaces of fracture. UDEC is adopted to simulate the wave propagation of single fracture with the six models and different stiffnesses. The modeling results of the transmission coefficient of the fracture models are compared with the theoretical solutions.It reveals that a rough joint surface distinctly affects the stress wave transmission in the jointed rocks compared with a smooth plane joint and decreases the amplitude and velocity.
引文
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[9]刘亚群,李海波,李俊如,等.爆破荷载作用下黄麦岭磷矿岩质边坡动态响应的UDEC模拟研究[J].岩石力学与工程学报,2004,23(21):3659–3663.(LIU Yaqun,LI Haibo,LI Junru,et al.UDEC simulation of dynamic response of rock slope of Huangmailing phosphorite mine under explosion[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3659–3663.(in Chinese))
[10]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385–2394.(LI Haibo,XIAO Keqiang,LIU Yaqun.Factor of safety analysis of bedding rock slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2385–2394.(in Chinese))
[11]张德海,朱浮声,邢纪波,等.岩石类非均质脆性材料破坏过程的数值模拟[J].岩石力学与工程学报,2005,24(4):570–574.(ZHANG Dehai,ZHU Fusheng,XING Jibo,et al.Numerical simulation of fracture propagation of anisotropic rock-like material[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(4):570–574.(in Chinese))
[12]郭易圆,李世海.有限长岩柱中纵波传播规律的离散元数值分析[J].岩石力学与工程学报,2002,21(8):1124–1129.(GUO Yiyuan,LI Shihai.Distinct element analysis of propagation characteristics of P-wave in rock pillar with finite length[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(8):1124–1129.(in Chinese))
[13]石崇,徐卫亚,周家文.二维波穿过非线性节理面的透射性能研究[J].岩石力学与工程学报,2007,26(8):1645–1652.(SHI Chong,XU Weiya,ZHOU Jiawen.Research on transmission behaviors of nonlinear joints with2D wave propagation[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(8):1645–1652.(in Chinese))
[14]鞠杨,李业学,谢和平,等.节理岩石的应力波动与能量耗散[J].岩石力学与工程学报,2006,25(12):2426–2434.(JU Yang,LI Yexue,XIE Heping,et al.Stress wave propagation and dissipation in jointed rocks[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(12):2426–2434.(in Chinese))
[15]NAKAGAWA S,NIHEI K T,MYER L R.Shear-induced conversion of seismic waves across single fractures[J].International Journal of Rock Mechanics and Mining Sciences,2000,37(1/2):203–218.
[2]ZHAO X B,ZHAO J,CAI J G,et al.UDEC modeling on wave propagation across fractured rock masses[J].Computers and Geotechnics,2008,35(1):97–104.
[3]CAI J G,ZHAO J.Effects of multiple parallel fractures on apparent attenuation of stress waves in rock masses[J].International Journal of Rock Mechanics and Mining Sciences,2000,37(4):661–682.
[4]韩嵩,蔡美峰.节理岩体物理模拟与超声波试验研究[J].岩石力学与工程学报,2007,26(5):1026–1033.(HAN Song,CAI Meifeng.Study on physical simulation of jointed rock mass and ultrasonic experiments[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):1026–1033.(in Chinese))
[5]邓涛,杨林德.各向异性岩石纵、横波的波速比特性研究[J].岩石力学与工程学报,2006,25(10):2023–2029.(DENG Tao,YANG Linde.Characteristics of velocity ration of P-wave and S-wave for anisotropic rocks[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(10):2023–2029.(in Chinese))
[6]李欢秋,卢芳云,吴祥云,等.应力波在有地下复合结构的岩石介质中传播规律研究[J].岩石力学与工程学报,2003,22(11):1832–1836.(LI Huanqiu,LU Fangyun,WU Xiangyun,et al.Study on regulation of stress wave propagation in rock mass with compound structures[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1832–1836.(in Chinese))
[7]王卫华,李夕兵,左宇军.非线性法向变形节理对弹性纵波传播的影响[J].岩石力学与工程学报,2006,25(6):1218–1225.(WANG Weihua,LI Xibing,ZUO Yujun.Effect of single joint with nonlinear normal deformation on P-wave propagation[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(6):1218–1225.(in Chinese))
[8]王泳嘉,邢纪波.离散单元法及其在岩土力学中的应用[M].沈阳:东北工学院出版社,1991.(WANG Yongjia,XING Jibo.Distinct element method and its application to rock and soil mechanical[M].Shenyang:Northeast University of Technology Press,1991.(in Chinese))
[9]刘亚群,李海波,李俊如,等.爆破荷载作用下黄麦岭磷矿岩质边坡动态响应的UDEC模拟研究[J].岩石力学与工程学报,2004,23(21):3659–3663.(LIU Yaqun,LI Haibo,LI Junru,et al.UDEC simulation of dynamic response of rock slope of Huangmailing phosphorite mine under explosion[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3659–3663.(in Chinese))
[10]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385–2394.(LI Haibo,XIAO Keqiang,LIU Yaqun.Factor of safety analysis of bedding rock slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2385–2394.(in Chinese))
[11]张德海,朱浮声,邢纪波,等.岩石类非均质脆性材料破坏过程的数值模拟[J].岩石力学与工程学报,2005,24(4):570–574.(ZHANG Dehai,ZHU Fusheng,XING Jibo,et al.Numerical simulation of fracture propagation of anisotropic rock-like material[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(4):570–574.(in Chinese))
[12]郭易圆,李世海.有限长岩柱中纵波传播规律的离散元数值分析[J].岩石力学与工程学报,2002,21(8):1124–1129.(GUO Yiyuan,LI Shihai.Distinct element analysis of propagation characteristics of P-wave in rock pillar with finite length[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(8):1124–1129.(in Chinese))
[13]石崇,徐卫亚,周家文.二维波穿过非线性节理面的透射性能研究[J].岩石力学与工程学报,2007,26(8):1645–1652.(SHI Chong,XU Weiya,ZHOU Jiawen.Research on transmission behaviors of nonlinear joints with2D wave propagation[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(8):1645–1652.(in Chinese))
[14]鞠杨,李业学,谢和平,等.节理岩石的应力波动与能量耗散[J].岩石力学与工程学报,2006,25(12):2426–2434.(JU Yang,LI Yexue,XIE Heping,et al.Stress wave propagation and dissipation in jointed rocks[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(12):2426–2434.(in Chinese))
[15]NAKAGAWA S,NIHEI K T,MYER L R.Shear-induced conversion of seismic waves across single fractures[J].International Journal of Rock Mechanics and Mining Sciences,2000,37(1/2):203–218.
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