基于相对位移反应谱分析的岩石爆破震动损伤评估
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摘要
本文以拉西瓦水电站工程为背景,以爆破监测速度为激励信号输入进行了相对位移反应谱的计算,并应用相对位移反应谱理论对岩体爆破震动损伤进行了相关分析。得到结论:相对位移反应谱积分值、以及该积分值与震动持续时间的乘积值均与岩石损伤深度的相关性较好;而且岩体阻尼比对相关系数影响不明显。因此,运用岩体损伤深度线性拟合方程对岩体爆破震动损伤效应进行综合评估是可行的。文章成果对工程实践有一定的参考价值。
The spectrum of relative velocity response of Laxiwa hydropower station to the excitation of monitored and measured blasting velocity is computed in this paper,and the damage fracture of rock blasting is analyzed by the theory of relative displacement response spectrum.The results show that the depth of rock blasting has a high correlation with the integral value of relative displacement response spectrum and the product of this integral value and the duration of blast vibrations,and that rock damping has insignificant influence on correlation coefficient.Thus it is feasible and practical to use fitting equation of rock damage depth as a comprehensive measure of blast effect for engineering design.
The spectrum of relative velocity response of Laxiwa hydropower station to the excitation of monitored and measured blasting velocity is computed in this paper,and the damage fracture of rock blasting is analyzed by the theory of relative displacement response spectrum.The results show that the depth of rock blasting has a high correlation with the integral value of relative displacement response spectrum and the product of this integral value and the duration of blast vibrations,and that rock damping has insignificant influence on correlation coefficient.Thus it is feasible and practical to use fitting equation of rock damage depth as a comprehensive measure of blast effect for engineering design.
引文
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[3]普永发,李香灿,陈怀宇.爆破人员安全知识读本[M].北京:治金工业出版社,1989,11:464～471.PU Yongfa,LI Xiangcan,CHEN Huaiyu.Blasting personnel safety knowledge reader[M].Beijing:Metallurgical Industry Press,1989,11:464～471.(in Chinese)
[4]吴腾芳,王凯,季茂荣.反应谱分析在工程微差爆破地震监测中的应用与分析研究[J].兵工学报,1998,19(3):271～274.WU Tengfang,WANG Kai,JI Maorong.Vibrational response spectrum in millsecond blasting[J].ACAT Armamen-Tarii,1998,19(3):271～274.(in Chinese)
[5]娄建武,龙源,方向,周翔.基于反应谱分析的爆破震动破坏评估研究[J].爆炸与冲击,2003,23(1):41～46.LOU Jianwu,LONG Yuan,FANG Xiang,et al.Study on blasting vibration damage based on response spectrum[J].Explosion andShock Waves,2003,23(1):41～46.(in Chinese)
[2]阳生权,廖先葵,刘宝琛.爆破地震安全判据的缺陷与改进[J].爆炸与冲击,2001,21(3):223～228.YANG Shengquan,LIAO Xiankui,LIU Baochen.Default of the judging standard of blasting vibration safety abstract[J].Explosionand Shock Waves,2001,21(3):223～228.(in Chinese)
[3]普永发,李香灿,陈怀宇.爆破人员安全知识读本[M].北京:治金工业出版社,1989,11:464～471.PU Yongfa,LI Xiangcan,CHEN Huaiyu.Blasting personnel safety knowledge reader[M].Beijing:Metallurgical Industry Press,1989,11:464～471.(in Chinese)
[4]吴腾芳,王凯,季茂荣.反应谱分析在工程微差爆破地震监测中的应用与分析研究[J].兵工学报,1998,19(3):271～274.WU Tengfang,WANG Kai,JI Maorong.Vibrational response spectrum in millsecond blasting[J].ACAT Armamen-Tarii,1998,19(3):271～274.(in Chinese)
[5]娄建武,龙源,方向,周翔.基于反应谱分析的爆破震动破坏评估研究[J].爆炸与冲击,2003,23(1):41～46.LOU Jianwu,LONG Yuan,FANG Xiang,et al.Study on blasting vibration damage based on response spectrum[J].Explosion andShock Waves,2003,23(1):41～46.(in Chinese)
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