某露天矿生产爆破合理微差时间探讨  

Study on Reasonable Millisecond Delay Time in Open-pit Mine

作　　者：张袁娟[1] 黄金香[2] 农冬灵[3] 王凤凰 

机构地区：[1]河南工程学院安全工程学院,郑州451191 [2]北京理工大学机电学院,北京100081 [3]北京市地质矿产勘查开发总公司,北京100050 [4]湖北宜化集团矿业有限责任公司,湖北宜昌443000

出　　处：《煤炭技术》2013年第12期202-203,共2页Coal Technology

基　　金：河南省教育厅自然科学研究项目(12B440001)

摘　　要：基于某露天矿具体工况,运用LS-DYNA显式非线性动力分析有限元程序分别建立微差时间0ms,25ms,42ms和65ms有限元模型,结合数学软件Matlab进行能量分析,获得了4种工况下模拟测点峰值振速和能量衰减规律,分析结果表明:微差时间42ms时总能量衰减率最大,并结合峰值振速衰减规律得出不是微差时间越长越好的结论。从振速和能量角度探索了适合该露天矿的孔间微差时间,达到降振的目的。Based on a certain open-pit mine, the peak particle velocitys of each simulated points in the situations of four millisecond delay times and energy attenuation law are obtained, by using LS-DYNA to establish finite model with the millisecond delay times 0ms, 25ms, 42ms, 60ms, combined with using Matlab to do the energy analysis. The analyzed results show that the energy attenuation rate is the biggest when the millisecond time is 42ms, and combined with attenuation law of the peak particle velocity, it is concluded that not the millisecond time more longer, the effect better. The reasonable millisecond time tbr the open-pit mine is found from points of the peak particle velocity and the energy, and then reduce the blasting vibration.

关 键 词：微差爆破 衰减率 数值模拟 能量分析 

分 类 号：TD235[矿业工程—矿井建设]