Two types of charge patterns of blasting. (a) Normal blasting. (b ...
This paper discusses the effect of water-decked blasting on fragmentation energy based on theory and numerical simulation, and three blasting tests were performed to measure the actual ...
One way of reducing blasting side effects is to use deck charges instead of continuous ones. The location of the deck(s) is still considered an unanswered question for many researchers. In this study, an investigation was carried out to find an appropriate air deck position(s) within the …
Charge structure comparison. a Continuous charge b Distributed charge …
Figure 20 shows the blasting diagram of on-site blasting practice. The double triangle method is applied to arrange the cut holes in the construction due to the large cross-sectional area...
Research on the influence of axial deck media on damage and …
This study investigates conditions with continuous charges and different deck medium charges to analyze the distribution characteristics of explosion cracks in various regions, including the blocked, charged, deck medium, and bottom uncharged sections.
Study on explosion impact pressure and damage distribution law …
Sep 1, 2024 · During the blasting excavation process in open-pit mines, the traditional continuous columnar charge structure presents issues such as excessive detonation pressure and short action time. These problems can result in over-crushing of rocks near the blasthole and the formation of large rock blocks at the top of the blasthole, thereby increasing ...
Many model experiments and mine practice have proved that the axial air deck charge can be used to achieve the ideal blasting effect,compared with the continuous columnar charge.
Schematic diagrams of (a) small-scale blasting model, and (b) charge …
Download scientific diagram | Schematic diagrams of (a) small-scale blasting model, and (b) charge structure and arrangement 139 of strain gauges. 140 from publication: Experimental study...
Rock fracture mechanism of air-deck charge blasting considering …
Dec 1, 2023 · This paper primarily focuses on examining the impact of blasting gas, studying the rock fracture mechanism of air-deck charge blasting, and analyzing the evolutionary characteristics of blasting stress, the law of damage distribution, and the fracture characteristics in rock specimens.
When blast engineers design the pattern to pull the toe with AN/FO as the total charge, things get a bit more complex. Operators can use bulked out AN/FO mixtures to achieve similar energy reduction in the collar zone, but the added time and effort often make this impractical.
Design method of blasthole charge structure based on lithology ...
Dec 20, 2021 · Calculate the charge volume and charge length of the blasthole charge and determine the charge position and size parameters of the blasthole segment charge, including the hard rock charge depth H h and the filling length H mid of intermediate air. The calculation formulas are as follows: