摘要
为研究边坡深孔爆破载荷作用下高程差与水平距离2项参数对振动速度影响程度,运用LS-DYNA建立工程相似模型进行模拟,并基于萨道夫斯基公式与高程差修正公式分别对测点振速进行单、多元回归分析。结果表明,经典萨道夫斯基公式对台阶平整地形下的振动速度拟合度较高;边坡面上随高程的改变出现明显的振速放大效应,沿边坡面的爆破振动速度与高程差的相关系数比水平距离与其相关系数高约12%;采用两种速度公式对坡面不同高程差位置的爆破振动速度回归分析,结果显示高程差修正公式的拟合度明显高于萨道夫斯基公式的拟合度。
In order to study the effect of two parameters of elevation difference and horizontal distance on the vibration velocity under the effect of the deep hole blasting on the slope.The engineering similarity model for simulation was established by LS-DYNA.The single and multiple regression analysis was performed on the vibration velocity of the measuring points.The results show that the classical Sadowski formula has a higher fitting degree of the vibration velocity on the stepped terrain of the rock mass.On the slope surface,the apparent vibration velocity amplification effect occurs with the change of elevation.The correlation coefficient between the blasting vibration velocity and the height deviation along the slope surface is higher than the horizontal distance and its correlation coefficient at^12%.The blasting vibration velocity regression analysis of different height deviation positions on the slope is calculated by using two different velocity formulas.And the fitting degree of the height deviation correction formula is significantly higher than the Sadowski formula’s fitting degree.
作者
梁瑞
王树江
周文海
杜超飞
邓克飞
何学良
LIANG Rui;WANG Shujiang;ZHOU Wenhai;DU Chaofei;DENG Kefei;HE Xueliang(School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China;China University of Geosciences(Wuhan)Engineering College,Wuhan 430074,China;Petro China Beijing Natural Gas Pipeline Co.,Ltd.,Beijing 100101,China)
出处
《有色金属工程》
CAS
北大核心
2020年第2期107-115,共9页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51566010)
甘肃省自然科学基金(B061709)~~
关键词
爆破振动
回归拟合
高程差
显著性
数值模拟
blasting vibration
regression fitting
height deviation
significance
numerical simulation
