CAJ | 학술논문

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。
기우모로천광구체공황，운용LS-DYNA현식비선성동력분석유한원정서분별건립미차시간0ms，25ms，42ms화65ms유한원모형，결합수학연건Matlab진행능량분석，획득료4충공황하모의측점봉치진속화능량쇠감규률，분석결과표명：미차시간42ms시총능량쇠감솔최대，병결합봉치진속쇠감규률득출불시미차시간월장월호적결론。종진속화능량각도탐색료괄합해로천광적공간미차시간，체도강진적목적。
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 for the open-pit mine is found from points of the peak particle velocity and the energy, and then reduce the blasting vibration.