Akademik Veri Yönetim Sistemi
APPLIED SCIENCES, cilt.2025, sa.15, ss.1-20, 2025 (SCI-Expanded, Scopus)
Rock’s response time to blasting (Tmin)
refers to the critical time elapsed between thedetonation of the explosive to
the fragmentation and displacement of the rock, and it isa fundamental
parameter that directly impacts blast-induced fragmentation. Although existing
studies acknowledge the importance of this parameter, there are uncertainties regarding
the factors determining Tmin. Furthermore, existing models use complex
parameters, fail to demonstrate sufficient performance in different engineering
scenarios, or are not suitable for use as a practical engineering tool. To
address these uncertainties and to reveal the relationship between Tmin and
fragmentation performance with an integrated model, a comprehensive dataset was
obtained from 27 blasts conducted in 12 different quarries in Türkiye. The
study followed a systematic methodology including geomechanical characterization,
Tmin measurement via high-speed videography, and pre- and post-blast photogrammetric
fragment size analysis. The findings enabled the development of a model that
predicts Tmin with high accuracy (R2 = 0.789, MAPE: %16.56) using parameters
easily measurable in practice. More importantly, this estimation of Tmin was
used in an integrated model where the mean fragment size (P50) could be
predicted directly and successfully (R2 = 0.837, MAPE: %8.37), providing a
significant contribution to the literature. In light of these results, the
primary engineering contribution of the study is that it has developed a
practical and reliable tool applicable in the field, which treats Tmin as an
optimizable design variable and provides a seamless prediction framework from
blasting design to the rock fragmentation.