摘要
运用LS DYNA非线性动力分析软件建立了有限元模型,分别对石灰岩和花岗岩2种工况的爆破振动进行了数值模拟分析;然后结合MATLAB小波分析程序对2种工况爆破振动的峰值振速和能量衰减进行了分析。现场试验结果表明,爆破振动衰减虽然均发生在爆破近区,但2种工况下由于岩石波阻抗不同,爆破振速能量衰减规律均不相同,论证了岩性对爆破效果及爆破衰减有较大影响,这为现场的爆破振动控制和安全管理提供了理论依据。
A finite element model was established by using nonlinear dynamic analysis software of LS DYNA,which was used to perform a numerical simulation analysis for blasting vibration of limestone and granite.Then,the peak vibration velocity and energy attenuation were analyzed for these two types of working conditions by using MATLAB wavelet analysis program.The field test results show that,although the attenuation of blasting vibration occurs in the vicinity of the blasting operation,the regulation of energy attenuation for blasting vibration velocity varies due to the different rock wave impedance under two working conditions.It is demonstrated that the lithology has brought greater effect to blasting effect and blasting attenuation,which can provide a theoretical basis for blasting vibration control and safety management on mine.
作者
张袁娟
孔德增
ZHANG Yuan juan;KONG De zeng(School of Safety Engineering,Henan Institute of Engineering,Zhengzhou 451191,Henan,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2019年第5期6-8,共3页
Mining and Metallurgical Engineering
基金
河南工程学院博士基金(D2013022)
河南省教育厅科学技术研究重点项目(14B440005)
国家自然科学基金(51104111)
郑州市科技攻关项目(141PPTGG375)
关键词
岩土爆破
爆破振动
数值模拟
LS
DYNA
小波分析
rock blasting
blasting vibration
numerical simulation
LS DYNA
wavelet analysis
