Akademik Veri Yönetim Sistemi
14th International Symposium on Rock Fragmentation by Blasting (FRAGBLAST), Antalya, Türkiye, 7 - 10 Nisan 2025, ss.904-910, (Tam Metin Bildiri)
As it is known, blast excavation works are often needed in
both mining and construction projects in our country. Considering their
contribution to the country's economy, it is important that such projects are
carried out effectively and without harming the environment. In this context,
vibration control of blasting has become inevitable. Most of the blast
excavations are carried out with Non-Electric (Nonel) Systems. During the
control of ground vibrations caused by blast excavation works with large
diameters and high production speeds, the sensitivity rates of Nonel Systems
are low due to the possibility of deviation in the delay values and the
inability to go beyond certain standard delay values during production. In this
study, the results of vibration velocity measurements were evaluated at three
different distances in the same direction during experimental blasts with single,
2, 3, and 4 holes, using eight different delay alternatives. By employing
electronic capsule technology with higher sensitivity, the delay intervals have
been precisely determined as 13 ms, 17 ms, 21 ms, 24 ms, 28 ms, 32 ms, 36 ms,
and 40 ms. In conclusion, the effect of delay intervals on vibration levels has
been determined. Another outcome of this study is that the number of holes and
rows in the blast groups may have an effect on vibration levels, as much as the
delay intervals.