隧道微差爆破振动速度及应力场研究
|
摘要
依据爆炸动力学和弹性波动理论,分析了同段起爆在损伤岩体中所产生的爆破振动速度及引起的应力。然后,根据爆炸波在传播中的叠加特性,提出了隧道微差爆破后围岩质点振动速度和应力解析解。研究表明:微差爆破相邻段别的地震波形随传播距离的增加而相互接近、叠加,在起到干扰降震的同时,使围岩体对其震动响应出现选择放大的几率也增加。爆破振动速度和应力解析解的提出,为隧道开挖采用合适的爆破掘进方法、减少施工误差及提高围岩稳定性提供了理论依据。
According to explosion dynamics and elastic wave theory,the blasting vibration velocity and stress field,induced by simultaneously blasting in the damaged rock mass are analyzed.And then,based on the superimposed properties of blasting wave,the analytic solutions of particle vibration velocity and stress of tunnel surrounding rock after millisecond blasting are put forward.The results show that seismic waves adjacent to the delay intervals in millisecond blasting are close to each other and superimposed with the increase of propagation distance.Millisecond blasting has not only the good effects of reducing vibration by wave interference,but also increases the probability of selective magnification on blasting-induced vibration.The study provides references for tunneling to choose the appropriate blasting excavation methods,reduce the construction error and enhance stability of the surrounding rock.
According to explosion dynamics and elastic wave theory,the blasting vibration velocity and stress field,induced by simultaneously blasting in the damaged rock mass are analyzed.And then,based on the superimposed properties of blasting wave,the analytic solutions of particle vibration velocity and stress of tunnel surrounding rock after millisecond blasting are put forward.The results show that seismic waves adjacent to the delay intervals in millisecond blasting are close to each other and superimposed with the increase of propagation distance.Millisecond blasting has not only the good effects of reducing vibration by wave interference,but also increases the probability of selective magnification on blasting-induced vibration.The study provides references for tunneling to choose the appropriate blasting excavation methods,reduce the construction error and enhance stability of the surrounding rock.
引文
[1]向文飞,舒大强,朱传云.起爆方式对条形药包爆炸应力场的影响分析[J].岩石力学与工程学报,2005,24(9):1624-1628.(XIANG Wenfei,SHU Daqiang,ZHU Chuanyun.Impacts of detonating mode on blaststress field of linear explosive charge[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(9):1624-1628.(in Chinese))
[2]陈庆,王宏图,胡国忠,等.隧道开挖施工的爆破振动监测与控制技术[J].岩土力学,2005,26(6):964-967.(CHEN Qing,WANG Hongtu,HU Guozhong,etal.Monitoring and controlling technology for blasting vi-bration induced by tunnel excavation[J].Rock and SoilMechanics,2005,26(6):964-967.(in Chinese))
[3]李夕兵,凌同华.单段与多段微差爆破地震的反应谱特征分析[J].岩石力学与工程学报,2005,24(14):2409-2413.(LI Xibing,LING Tonghua.Responsespectrum analysis of ground vibration induced by singledeck and multi-deck blasting[J].Chinese Journal ofRock Mechanics and Engineering,2005,24(14):2409-2413.(in Chinese))
[4]张丹,段恒建,曾福洪.分段爆破地震强度的试验研究[J].爆炸与冲击,2006,26(3):279-283.(ZHANG Dan,DUAN Hengjian,ZENG Fuhong.Ex-perimental study on subordinate blasting seismic intensi-ty[J].Explosion and Shock Waves,2006,26(3):279-283.(in Chinese))
[5]言志信,吴德伦,王漪,许明.地震效应及安全研究[J].岩土力学,2002,23(2):201-203.(YAN Zhix-ing,WU Delun,WANG Yi,XU Ming.The study ofblast vibration effect and safety[J].Rock and Soil Me-chanics,2002,23(2):201-203.(in Chinese))
[6]卢文波,Hustrulid W.质点峰值振动速度衰减公式的改进[J].工程爆破,2002,8(3):1-4.(LU Wenbo,Hustrulid W.An improvement to the equation for the at-tenuation of the peak particle velocity[J].Engineeringblasting,2002,8(3):1-4.(in Chinese))
[7]支国华.岩体的节理裂隙及断层对爆破地震波传播的影响的动力分析[D].同济大学博士论文,1994.11.(ZHI Guohua.The dynamical analysis of influenceof jointed rock mass and fault on propagation character-istics of explosive seismic wave[D].The dissertationfor the doctorate of Tongji University,1994.11.(inChinese))
[8]林大超,张奇,白春华.近地表爆炸地震的地面竖向振动速度的随机特性[J].爆炸与冲击,2000,20(3).(LIN Dachao,ZHANG Qi,BAI Chunhua.Ran-dom Property of Ground Vertical Vibration Velocity In-duced by Near Ground Explosion Seismic Effect[J].Explosion and Shockwaves,2000,20(3).(in Chi-nese))
[9]郑治真.波谱分析基础[M].地震出版社,1979.(ZHENG Zhizhen.wave spectral analytical fundament[M].China Earthquake Press,1979.(in Chinese))
[10]彭道富,李忠献,杨年华.爆破动荷载对隧道结构稳定性的影响[J].爆破器材,2004,33(增):63-66.(PENG Daofu,LI Zhongxian,YANG Nianhua.The in-fluence of blasting dynamic load on tunnel structural sta-bility[J].Explosive Material,2004,33(Suppl):63-66.(in Chinese))
[11]甄育才,朱传云.中远区微差爆破振动叠加效应影响因素分析[J].爆破,2005,22(2):11-15.(ZHENYucai,ZHU Chuanyun.Analysis on influential factorsof vibration superposition in middle and far field of milli-second blasting[J].Blasting,2005,22(2):11-15.(in Chinese))
[2]陈庆,王宏图,胡国忠,等.隧道开挖施工的爆破振动监测与控制技术[J].岩土力学,2005,26(6):964-967.(CHEN Qing,WANG Hongtu,HU Guozhong,etal.Monitoring and controlling technology for blasting vi-bration induced by tunnel excavation[J].Rock and SoilMechanics,2005,26(6):964-967.(in Chinese))
[3]李夕兵,凌同华.单段与多段微差爆破地震的反应谱特征分析[J].岩石力学与工程学报,2005,24(14):2409-2413.(LI Xibing,LING Tonghua.Responsespectrum analysis of ground vibration induced by singledeck and multi-deck blasting[J].Chinese Journal ofRock Mechanics and Engineering,2005,24(14):2409-2413.(in Chinese))
[4]张丹,段恒建,曾福洪.分段爆破地震强度的试验研究[J].爆炸与冲击,2006,26(3):279-283.(ZHANG Dan,DUAN Hengjian,ZENG Fuhong.Ex-perimental study on subordinate blasting seismic intensi-ty[J].Explosion and Shock Waves,2006,26(3):279-283.(in Chinese))
[5]言志信,吴德伦,王漪,许明.地震效应及安全研究[J].岩土力学,2002,23(2):201-203.(YAN Zhix-ing,WU Delun,WANG Yi,XU Ming.The study ofblast vibration effect and safety[J].Rock and Soil Me-chanics,2002,23(2):201-203.(in Chinese))
[6]卢文波,Hustrulid W.质点峰值振动速度衰减公式的改进[J].工程爆破,2002,8(3):1-4.(LU Wenbo,Hustrulid W.An improvement to the equation for the at-tenuation of the peak particle velocity[J].Engineeringblasting,2002,8(3):1-4.(in Chinese))
[7]支国华.岩体的节理裂隙及断层对爆破地震波传播的影响的动力分析[D].同济大学博士论文,1994.11.(ZHI Guohua.The dynamical analysis of influenceof jointed rock mass and fault on propagation character-istics of explosive seismic wave[D].The dissertationfor the doctorate of Tongji University,1994.11.(inChinese))
[8]林大超,张奇,白春华.近地表爆炸地震的地面竖向振动速度的随机特性[J].爆炸与冲击,2000,20(3).(LIN Dachao,ZHANG Qi,BAI Chunhua.Ran-dom Property of Ground Vertical Vibration Velocity In-duced by Near Ground Explosion Seismic Effect[J].Explosion and Shockwaves,2000,20(3).(in Chi-nese))
[9]郑治真.波谱分析基础[M].地震出版社,1979.(ZHENG Zhizhen.wave spectral analytical fundament[M].China Earthquake Press,1979.(in Chinese))
[10]彭道富,李忠献,杨年华.爆破动荷载对隧道结构稳定性的影响[J].爆破器材,2004,33(增):63-66.(PENG Daofu,LI Zhongxian,YANG Nianhua.The in-fluence of blasting dynamic load on tunnel structural sta-bility[J].Explosive Material,2004,33(Suppl):63-66.(in Chinese))
[11]甄育才,朱传云.中远区微差爆破振动叠加效应影响因素分析[J].爆破,2005,22(2):11-15.(ZHENYucai,ZHU Chuanyun.Analysis on influential factorsof vibration superposition in middle and far field of milli-second blasting[J].Blasting,2005,22(2):11-15.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心