层理对爆破振动传播规律的影响  

INFLUENCE OF STRATIFICATION ON ATTENUATION LAW OF BLASTING VIBRATION

作　　者：宋全杰[1] 李海波[1] 李俊如[1] 姚文生 杨风威[1] 王秒[1] 

机构地区：[1]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实验室,湖北武汉430071 [2]山东核电有限公司,山东海阳265116

出　　处：《岩石力学与工程学报》2012年第10期2103-2108,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家杰出青年基金项目(51025935);国家重点基础研究发展计划(973)项目(2010CB732001)

摘　　要：山东海阳核电厂场地层理分布比较明显,在岩基爆破开挖过程中,通过测试爆区后方测爆连线与层理走向不同夹角方向的一系列测点的振动速度值,求出了与层理走向不同夹角方向的爆破振动衰减规律。文中指出当不考虑爆破抵抗线后冲力等其他因素影响时,同一爆源的相同爆源距处,在顺着层理走向测得的爆破振动速度值大于在垂直于层理走向测得的爆破振动速度值,给出了爆破振动衰减指数随测爆连线与层理走向夹角的增大而增大的结论。在进行爆破振动监测时,应该按照场地地质情况,合理布置监测点。当现场情况较为复杂时,沿爆源周边多布置几个监测点是必要的。Shandong Haiyang Nuclear Power Plant site contains multitudinous stratifications. On the basis of monitoring points＇ velocity of blasting vibration, the attenuation laws of blasting vibration in different directions to stratification are given out in the process of blasting excavation. It is concluded based on blasting experiment that the velocity of blasting vibration along the stratification strike is bigger than that perpendicular to the stratification strike with same distance and same excavation without considering the influence of blasting rear impact. What＇s more, blasting vibration damped exponential increases when the angle between stratification strike and the line from monitoring points to explosive source makes larger. Therefore, the monitoring points need to be made sure on rational site in accordance with the site geological condition; and it is necessary to have several monitoring points when the site situation is complex.

关 键 词：爆破工程 岩基 爆破振动 爆破控制 衰减规律 层理 

分 类 号：O38[理学—流体力学]