论文部分内容阅读
为了研究预裂缝长度对爆破效果的影响,运用大型动力显式软件LS-DYNA对长度分别为5 m和7 m的预裂缝与贯通裂隙对爆破效果的影响进行了模拟,从峰值振速衰减的角度结合数值模拟结果得出结论:针对3种工况,预裂缝越长,减震效果越好,预裂缝对峰值振速存在的屏蔽区也受预裂缝长度的影响.结论对预裂爆破的研究及爆破参数的设置有一定的借鉴作用.
In order to study the effect of pre-crack length on the blasting effect, the effect of pre-cracking and through-crack on the blasting effect with length of 5 m and 7 m was simulated by the large dynamic explicit software LS-DYNA. From the perspective of numerical simulation, it is concluded that for the three conditions, the longer the pre-cracking, the better the damping effect, and the pre-cracking peak area of the shielding zone affected by the pre-crack length.Conclusion For pre-cracking blasting Research and setting of blasting parameters have certain reference value.