Akademik Veri Yönetim Sistemi
Biltek Congress - XIV, Bangkok, Tayland, 18 - 21 Şubat 2026, ss.82-97, (Tam Metin Bildiri)
Rock fragmentation by blasting is a
critical process in the production of aggregate, which is the primary raw
material for the construction and infrastructure sectors. The efficiency and
control of blasting performance are of great importance in terms of resource
use sustainability, cost-effectiveness, and environmental impacts. In this
context, the optimization of blasting design plays a vital role in the
sustainable development of the sector.
This study
examines the performance and results of two consecutive blasting operations
carried out in a medium-strength rock environment, classified according to
uniaxial compressive strength. In the first blasting application, due to the
insufficient inter-row delay time for the rock mass to complete its movement
towards the free face, the rear row holes were initiated before the mass in the
front row had adequately displaced. This situation caused a significant portion
of the explosive energy to be expended on the formation of back-break.
Consequently, this prevented the fragmented rocks from detaching from the main
mass and being displaced, leading to failure in achieving the desired material
distribution.
In the second
blasting, carried out on the rock mass weakened by the aforementioned initial
blasting, both the fragmentation energy efficiency decreased and a homogeneous
muck pile could not be obtained. Within the scope of the study, the hole design
and charging parameters applied in the field were recorded. Additionally, the
in-situ block size distribution on the bench face before blasting and the muck
pile fragment size distribution after blasting were determined using digital image
processing methods, and the rock size reduction ratio was calculated.
Furthermore, the back-break distance resulting from the first blasting was
measured.
The findings
reveal that, especially in medium-strength rock conditions, the problem of
back-break and lack of displacement caused by incorrect planning of the
inter-row delay time not only reduces the efficiency of the relevant blasting
but also seriously and negatively affects subsequent production blasts and the
continuity of the overall production cycle.