台阶爆破振动传播规律及动力响应特征研究  

Research on Vibration Propagation Law and Dynamic Response Characteristics of Bench Blasting

作　　者：雷振[1] 高正华 左宇军[2] 何兴贵 袁玉宝 贺路 LEI Zhen;GAO Zheng-hua;ZUO Yu-jun;HE Xing-gui;YUAN Yu-bao;HE Lu(Mining College,Guizhou Institute of Technology,Guiyang 550025,China;Mining College,Guizhou University,Guiyang 550025,China;College of Civil Engineering,Guizhou University,Guiyang 550025,China;Guizhou Xinlian Blasting Engineering Group Co Ltd,Guiyang 550025,China)

机构地区：[1]贵州理工学院矿业学院,贵阳550025 [2]贵州大学矿业学院,贵阳550025 [3]贵州大学土木工程学院,贵阳550025 [4]贵州新联爆破工程集团有限公司,贵阳550025

出　　处：《爆破》2019年第4期137-145,共9页Blasting

基　　金：国家自然科学基金项目(51664007)

摘　　要：针对台阶爆破施工对邻近建(构)筑物的破坏问题,以某台阶爆破工程为背景,通过现场实验及数值计算,研究了水平距与高程共同作用下单响最大药量为3.8 kg、直径为38 mm孔爆破振动传播规律及动力响应特征。研究表明:振速响应特征规律与现场实测一致,水平距与高程共同作用下爆源近处峰值振速衰减较快,远处衰减较慢,垂向出现典型的高程放大效应,放大系数为1.2倍,但总体峰值振速并没有出现放大效应,主频率与总体峰值振速保持较好的一致性,总体呈衰减趋势;位移响应特征规律与振速变化趋势一致,合成峰值位移与合成峰值振速存在函数关系y=0.18+0.74v。Aiming at the damage to adjacent structures by bench blasting construction,considering a certain bench blasting project,through field experiments and numerical simulation,the blasting vibration propagation law and dynamic response characteristics of a single-hole with a maximum single delay charge of 3.8 kg and a diameter of 38 mm were studied under the joint action of horizontal distance and elevation.The results showed that the response characteristic law of the vibration velocity is consistent with the field test.Under the joint action of horizontal distance and elevation,the PPV(Peak particle vibration velocity) near the source of the explosion decays quickly,whereas the PPV at a distance from the source of the explosion decays slowly.A typical elevation amplification effect appears in the vertical direction with a magnification factor of 1.2,but the overall PPV does not have an amplification effect.The main frequency,which is in good consistency with the overall PPV,shows a general attenuation trend.The response characteristic law of the displacement is consistent with the changing trend of the vibration velocity.The relationship between synthetic peak displacement(y) and PPV(v) is y=0.18+0.74v.

关 键 词：台阶爆破 现场实验 数值模拟 传播规律 动力响应 

分 类 号：TD235[矿业工程—矿井建设]