凸形地貌对爆破震动波传播影响的数值模拟
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摘要
应用UDEC程序模拟了爆破震动波在两种凸形地貌中的传播特征,并与广东岭澳核电站2期基础爆破开挖现场监测结果进行了对比。结果表明,凸形地貌对爆破震动波具有明显的放大作用,其数值模拟结果与现场监测结果吻合得比较好。研究结果还揭示,在一定爆破能量下,爆破震动波速度放大系数并不随台阶型凸形地貌的增高而单调增加,而是先随凸形地貌高度的增加而增加,在凸形地貌高度达到某一临界值时放大系数达到最大值,当凸形地貌高度超过这一临界值时,放大系数随凸形地貌高度的增加而减小。另外,在孤立凸形地貌下爆破振动波速度放大系数还与凸形地貌的高宽比有关。
Based on blasting vibration monitoring for the second phase for Ling-ao Nuclear Power Station,in Guangdong Province,the wave propagation characteristics under blasting in concave landforms are simulated with UDEC.It is found that the protruding topography can enhance scale of vibration wave of blasting,and the numerical simulation results agree well with that by site monitoring.The numerical results show that,under protruding topography,the amplified coefficient of velocity of vibration wave of blasting does not monotonously increase with the height of terrains.In the definitive energy of the explosion source,it is found that the amplified coefficient increase when the height of protruding topography is below a critical point,but it will decrease if the height of protruding topography exceed the critical point.The amplified coefficient is also relative to the ratio of height to width under condition of isolated protruding topography.
Based on blasting vibration monitoring for the second phase for Ling-ao Nuclear Power Station,in Guangdong Province,the wave propagation characteristics under blasting in concave landforms are simulated with UDEC.It is found that the protruding topography can enhance scale of vibration wave of blasting,and the numerical simulation results agree well with that by site monitoring.The numerical results show that,under protruding topography,the amplified coefficient of velocity of vibration wave of blasting does not monotonously increase with the height of terrains.In the definitive energy of the explosion source,it is found that the amplified coefficient increase when the height of protruding topography is below a critical point,but it will decrease if the height of protruding topography exceed the critical point.The amplified coefficient is also relative to the ratio of height to width under condition of isolated protruding topography.
引文
[1]唐海,李海波,李俊如,等.凹形地貌对爆破振动波传播影响的数值模拟[J].岩土力学,2008,29(6):1540-1544.TANG Hai,LI Hai-bo,LI Jun-ru,et al.Numerical simulation of influence of concave landform on blasting vibration wave propagation[J].Rock and Soil Mechanics,2008,29(6):1540-1544.
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[10]舒大强,何蕴龙,董振华.岩质高边坡开挖爆破震动荷载及其对边坡稳定性影响的研究[J].工程爆破,1996,(4):39-43.SHU Da-qiang,HE Yun-long,DONG Zhen-hua.Research on vibration load from excavation blasting andits influence on stability of rock high-slope[J].Engineering Blasting,1996,(4):39-43.
[11]Spyros Sklavounos,Fotis Rigas.Computer simulation of shock waves transmission in obstructed Terrains[J].Journal of Loss Prevention in the Process Industries,2004,17:407-417.
[12]林士炎,李长洪,乔兰,等.爆破震动对高速路边坡影响的数值模拟[J].北京科技大学学报,2003,25(6):507-509.LIN Shi-yan,LI Chang-hong,QIAO Lan,et al.Numerical simulation on the influence of blasting vibration on the freeway slope[J]Journal of University of Science and Technology Beijing,2003,25(6):507-509.
[13]Masahiko Fuyuki,Masayoshi Nakano.Finite difference analysis of rayleigh wave transmission past an upward step change[J].Bulletin of the Seismological Society of America,1984,74(3):893-911.
[14]夏祥,李海波,李俊如,等.岩体爆生裂纹的数值模拟[J].岩土力学,2006,27(11):1987-1991.XIA Xiang,LI Hai-bo,LI Jun-ru,et al.Numerical simulation of blast-induced cracks in rock[J].Rock and Soil Mechanics,2006,27(11):1987-1991.
[15]CHEN S G,ZHAO J,ZHOU Y X.UDEC modeling of a field explosion test[J].International Journal of Blasting and Fragmentation,2000,(4):149-163.
[16]DONZE F V,BOUCHEZ J.Magnier S A.Modeling fractures in rock blasting[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(8):1152-1163.
[17]祁生文.边坡动力反应分析[博士后学位论文][D].北京:中国科学院地质与地球物理研究所,2004.
[18]曹欣荣,宋天舒,刘殿魁.任意形状凸起地形对平面SH波的散射[J].应用数学和力学,2001,22(9):976-982.CAO Xin-rong,SONG Tian-shu,LIU Dian-kui.Scattering of plane SH-wave by a cylindrical hill of arbitrary shape[J]Applied Mathematics and Mechanics,2001,22(9):976-982.
[2]陈均璠,周洪文.清江隔河岩水电站厂房高边坡开挖爆破振动地震效应的研究[C]//国际滑坡与岩土工程学术会议论文集.武汉:华中理工大学出版社,1991.
[3]吕淑然,杨军,刘国振.露天矿爆破地震效应与降震技术研究[J].有色全属(矿山部分),2003,55(3):30-32.LüShu-ran,YANG Jun,LIU Guo-zhen.Study on effect of blasting seismic vibration and vibration reducing technology in open-pit mine[J].Nonferrous Metals(Mining Section),2003,55(3):30-32.
[4]王在泉,陆文兴.高边坡爆破开挖震动传播规律及质量控制[J].爆破,1994,11(3):1-4.WANG Zai-quan,LU Wen-xing.The law of blasting vibration and Quality control on High Side-Slope by blasting excavation[J].Blasting,1994,11(3):1-4.
[5]郭学彬,肖正学,张志呈.爆破振动作用的坡面效应[J].岩石力学与工程学报,2001,20(1):83-87.Guo Xue-bin,Xiao Zheng-xue,Zhang Zhi-cheng.Slope effect of blasting vibration[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(1):83-87.
[6]CELEBI M.Topographical and geological amplifications determined from strong-motion and aftershock records of the3March1985Chile earthquake[J].Bulletin of the Seismological Society of America,1987,77(4):1147-1167.
[7]ASHFORD S A,SITAR N.Topographic amplification in the1994Northridge earthquake:Analysis and observations[C]//6th U.S.National Conference on Earthquake Engineering.[S.l.]:[s.n.],1997.
[8]PEDERSEN H,LE BRUN B,HATZFELD D,et al.Ground motion amplitude across ridges[J].Bulletin of the Seismological Society of America,1994,84(6):1786-1800.
[9]Ashford S A,Nicholas Sitar,John Lysmer,et al.Topographic effects on the seismic response of steep slopes[J].Bulletin of the Seismological Society of America,1997,87(3):701-709.
[10]舒大强,何蕴龙,董振华.岩质高边坡开挖爆破震动荷载及其对边坡稳定性影响的研究[J].工程爆破,1996,(4):39-43.SHU Da-qiang,HE Yun-long,DONG Zhen-hua.Research on vibration load from excavation blasting andits influence on stability of rock high-slope[J].Engineering Blasting,1996,(4):39-43.
[11]Spyros Sklavounos,Fotis Rigas.Computer simulation of shock waves transmission in obstructed Terrains[J].Journal of Loss Prevention in the Process Industries,2004,17:407-417.
[12]林士炎,李长洪,乔兰,等.爆破震动对高速路边坡影响的数值模拟[J].北京科技大学学报,2003,25(6):507-509.LIN Shi-yan,LI Chang-hong,QIAO Lan,et al.Numerical simulation on the influence of blasting vibration on the freeway slope[J]Journal of University of Science and Technology Beijing,2003,25(6):507-509.
[13]Masahiko Fuyuki,Masayoshi Nakano.Finite difference analysis of rayleigh wave transmission past an upward step change[J].Bulletin of the Seismological Society of America,1984,74(3):893-911.
[14]夏祥,李海波,李俊如,等.岩体爆生裂纹的数值模拟[J].岩土力学,2006,27(11):1987-1991.XIA Xiang,LI Hai-bo,LI Jun-ru,et al.Numerical simulation of blast-induced cracks in rock[J].Rock and Soil Mechanics,2006,27(11):1987-1991.
[15]CHEN S G,ZHAO J,ZHOU Y X.UDEC modeling of a field explosion test[J].International Journal of Blasting and Fragmentation,2000,(4):149-163.
[16]DONZE F V,BOUCHEZ J.Magnier S A.Modeling fractures in rock blasting[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(8):1152-1163.
[17]祁生文.边坡动力反应分析[博士后学位论文][D].北京:中国科学院地质与地球物理研究所,2004.
[18]曹欣荣,宋天舒,刘殿魁.任意形状凸起地形对平面SH波的散射[J].应用数学和力学,2001,22(9):976-982.CAO Xin-rong,SONG Tian-shu,LIU Dian-kui.Scattering of plane SH-wave by a cylindrical hill of arbitrary shape[J]Applied Mathematics and Mechanics,2001,22(9):976-982.
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