摘要
爆破引起的振动是影响爆破生产安全和边坡岩体稳定性的重要因素,因此展开对爆破振动高程效应的研究是有必要的。本文通过现场爆破振动实测和混凝土模型爆破振动试验,研究台阶高度与爆破振动高程效应的关系,结果表明:高程对爆破振动既有放大效应也存在衰减效应,以衰减效应为主,放大效应为辅。在高程放大效应显现明显的区域,放大倍数随着高程差的增加,呈现先增大后缩小的变化规律。从整体来看,距爆源水平距离相等的测点,台阶的振速低于平地,在高程放大效应显现明显的区域除外。
The vibration caused by blasting is an important factor affecting the safety of blasting production and the stability of slope rock mass.Therefore,it is necessary to carry out research on the elevation effect of blasting vibration.In this paper,the relationship between step height and blasting vibration elevation effect is studied by on-site blasting vibration measurement and concrete model blasting vibration test.It is concluded that the elevation has both amplification effect and attenuation effect on the blasting vibration,and the attenuation effect is dominant,and the amplification effect is supplemented.And in the region where the elevation amplification effect appears obvious,the magnification increases first and then decreases with the increase of the elevation difference.From the overall point of view,when a measuring point is at the same horizontal distance from the source,the vibration velocity of the step is lower than the flat ground,except for the region where the elevation amplification effect is obvious.
作者
张小军
汪旭光
崔新男
李少林
刘佳敏
ZHANG Xiaojun;WANG Xuguang;CUI Xinnan;LI Shaolin;LIU Jiamin(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;BGRIMM Technology Group,Beijing 100160,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《中国矿业》
北大核心
2020年第3期124-129,共6页
China Mining Magazine
基金
国家自然科学基金项目资助（编号：51208036）
中国工程院咨询研究项目资助（编号：2016-XZ-09）
关键词
爆破振动
高程效应
模型试验
台阶边坡
blasting vibration
elevation effect
model test
step slope
