摘要
采用有限元方法对某硐室开挖爆破振动进行了数值模拟,并与爆破振动现场测试结果进行了对比分析,测试与数值模拟PPV峰值振动速度结果基本吻合。根据单元峰值有效应力进行回归分析,得出衰减规律基本遵循负幂指数规律衰减。数值计算结果表明,数值模拟能够揭示岩石内部的爆破情况,反应岩石内部爆破应力分布的规律,研究结果对爆破施工有一定的指导意义。
Numerical simulation of vibration of chamber blasting has been taken. A contrastive analysis of the simulation data and the field test results has been made. The test results mostly tally with the vibration speed of PPV peak value of numerical simulation. Regression analysis has been made according to the effective stress of element peak value, finding that the attenuating rule follows the negative-power exponent attenuation rule basically. The results of numerical calcu- lation indicate that numerical simulation can open out the blasting condition in rock, reflect the distributing rule of blas- ting stress in the rock. The results are useful in guiding blasting construction.
出处
《矿冶工程》
CAS
CSCD
北大核心
2007年第4期14-16,共3页
Mining and Metallurgical Engineering
基金
教育部新世纪优秀人才资助项目(NCET-05-0559)
教育部科学技术研究重点资助项目(205069)
安徽省自然科学基金重点资助项目(KJ2007A060)
安徽高校省级自然科学研究项目(070414167)
南阳师范学院科研基金资助课题
关键词
硐室爆破
震动测试
震动强度
质点峰值震动速度
数值模拟
chamber blasting
vibration test
vibration intensity
peak particle velocity
numerical simulation
