数码雷管高精度延时对爆破振动影响试验研究

以国家重点推广数码雷管为契机,在和尚桥铁矿开展了不同高精度延时的现场爆破试验,对比分析了延时间隔对爆破振动的影响规律,并分析了爆破块度分布特征.研究表明:①微差时间对近区爆破振动的影响大于远区,且测点与爆区的距离越近,微差时间影响越显著.②在近区,随着微差时间增加,测点振动速度呈现"先增大,后减小,再增大"的较大幅度波...

Test Study on the Effect of Digital Detonator High Precision Delay Time on Blasting Vibration

Taking the national key promotion of digital detonators as an opportunity， field blasting tests with different high-precision delays were carried out in Heshangqiao Iron Mine. The influence of delay intervals on blasting vibration was compared and analyzed， and the distribution characteristics of blasting fragmentation were analyzed. The results showed that :①the influence of the millisecond time on blasting vibration in the near zone was greater than that on the far zone， and the closer the distance between the measuring point and the explosion zone， the more significant the influence of the millisecond time. ②In the near zone， as the millisecond time increases， the vibration velocity presents a fluctuating change law of "first increase， then decrease， then increase". In the far area， the amplitude of vibration fluctuations was significantly reduced. ③In order to weaken the impact of blasting vibration on the building， different millisecond times should be selected according to the distance between the building and the explosion zone. The suitable millisecond time in the near zone is 16 ms， and it is 40 ms in the far zone.④ The millisecond time has little effect on the distribution of blasting fragmentation，the overall blasting fragmentation presented a positive skew distribution，50% of the blasting fragmentation could be controlled within 70 mm， and 80% of the fragmentation could be controlled within 130 mm.