凹形地貌对爆破振动波传播影响的数值模拟  

Numerical simulation of influence of concave landform on blasting vibration wave propagation

作　　者：唐海[1] 李海波[2] 周青春[2] 李俊如[2] 夏祥[2] 张磊奇 

机构地区：[1]湖南科技大学能源与安全工程学院,湘潭411201 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,武汉430071 [3]河南省南阳市水利勘测设计院,河南南阳473063

出　　处：《岩土力学》2008年第6期1540-1544,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50439030)

摘　　要：应用UDEC程序模拟了爆破振动波在凹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。对比分析结果表明,数值模拟结果与现场监测结果较为吻合。研究结果还揭示,凹形地貌对爆破振动波具有明显的衰减作用,质点水平向振动速度的衰减幅度大于质点垂直向。同时,衰减系数随凹形地貌深度、宽度的增加而增加,但随宽度增加的幅度较小。另外,爆破振动波的衰减系数随爆源距增加而减小,随最大段药量的增大而增大。Based on blasting vibration monitoring for the second phrase for Ling-ao Nuclear Power Station in Guangdong Province,the wave propagation characteristics under blasting in concave landforms are simulated with UDEC.It is founded that the numerical simulation results agree well with that by site monitoring.It is reported that the peak particle velocity（PPV） of blasting clearly decreased in concave landforms and the decreasing rate of PPV in horizontal direction is large than that in vertical direction.It is also reported that the attenuation coefficient increased with increment of depth and width of concave landforms;and the rising rates of attenuation coefficient with the width is less than that of depth.It is further suggested that the attenuation coefficient increases with increment of the charge weight and decreases with increment of explosive distance.

关 键 词：凹形地貌 爆破振动波 衰减系数 数值模拟 

分 类 号：O382[理学—流体力学]