Applied Sciences, Год журнала: 2024, Номер 14(24), С. 11626 - 11626
Опубликована: Дек. 12, 2024
In order to address the issue of limited excavation footage in drilling and blasting a water diversion tunnel with cross-section approximately 10 m2, which is unable meet demands rapid construction, method combining long short straight-hole cutting was proposed based on theories elastic mechanics, craters, explosive gas stress waves. A mechanical model established elucidate parameter design cavity formation principle combined cutting. Numerical simulation field tests were employed analyze rock-breaking process cutting, view comparing effect differences between traditional inclined method. The research results indicate that during uncharged portion deep hole can serve as an empty subsequent shallow hole. concentration at wall superposition reflected incident waves enhance hole, enhancement being influenced by diameter distance it preferential detonation provide smaller resistance line free surface for detonation, creating favorable conditions rock fragmentation blasting, making easier area be thrown out increasing utilization rate blast holes. shape formed strip-shaped cube, its volume spacing each group mass damage most severe vertical direction, while center upper lower edges relatively weaker. optimize energy, essential select appropriate comparison cuts, implementation holes has been observed result greater extent consumption. These findings reference point efficient construction small-section engineering, well cut reduced
Язык: Английский